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[课题组] 清华大学材料学院李敬锋

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发表于 2017-3-11 15:17:17 | 只看该作者 |只看大图 回帖奖励 |倒序浏览 |阅读模式
李敬锋,清华大学材料学院教授。1984年毕业于华中科技大学,1991年获日本东北大学博士学位,1992-2002年任日本东北大学助理教授、副教授,2002年回国任清华大学教授,2003年获国家杰出青年基金,2008年入选教育部长江学者特聘教授。目前任Journal of Materiomics主编、《硅酸盐学报》副主编、中国材料研究学会热电材料与应用分会主任、中国硅酸盐学会微纳技术分会副理事长、中国硅酸盐学会薄膜与涂层分会副理事长。



李敬锋,清华大学材料学院教授,博士生导师,副院长
教育部长江学者特聘教授,国家杰出青年基金获得者
【联系方式】
电子邮件:jingfeng@mail.tsinghua.edu.cn
实验室:技科楼2402,2404,2406,2408,2410,2432,2429
联系电话:62784845,62789408
个人主页:MSE/lijingfeng

教育背景
1980.9-1984.7 华中科技大学机械工程2系金属材料及热处理专业学士学位
1985.10-1991.3 日本东北大学(Tohoku University)工学部材料系,工学硕士(1988.3), 工学博士(1991.3)

工作履历
1991.3-1992.2 日本陶瓷技术株式会社特别研究人员(博士后)
1992.3-2002.9 日本东北大学工学部材料系助手(1992-1997);副教授(1997-2002)
2002.2- 清华大学材料科学与工程系教授,博士生导师,系副主任
2013.1- 清华大学材料学院教授,博士生导师,副院长

学术兼职
《Journal of Materiomics》主编,《硅酸盐学报》副主编,《NPG Asia Materials》顾问编委,《Journal of Advanced Ceramics》、《Journal of Asia Ceramic Societies》、《Rare Metals》、《粉末冶金技术》编委、2008年至2013年曾担任《Journal of Materials Processing Technology》副主编(Subject Editor);国际梯度功能材料顾问委员会理事,IEEE-TUFFC ferroelectric committee 委员,中国硅酸盐学会理事,中国硅酸盐学会薄膜与涂层分会副理事长,中国微米纳米技术学会理事,中国材料研究学会理事,中国材料研究学会热电材料与应用分会副主任委员,中国金属学会粉末冶金分会第六届委员会委员

研究领域
压电陶瓷与器件,热电材料与器件,MEMS材料技术,陶瓷复合材料及其力学性能
[研究兴趣]:无铅压电陶瓷,压电陶瓷薄膜与MEMS微结构,压电复合材料,高性能热电半导体及其MEMS微型热电器件,功能梯度材料,复合陶瓷的强韧性,压电陶瓷的力学性能

奖励与荣誉
1995年获日本金属学会青年研究者奖
1998年获日本原田研究奖
2003年获国家杰出青年科学基金
2008年入选教育部长江学者特聘教授
2012年获2010年度北京市科学技术奖三等奖(高性能铌酸钾钠基无铅压电陶瓷的研发)
2012年获2011年度北京市科学技术奖三等奖(高性能纳米复合结构热电材料与微器件技术)
2014年获Journal of the American Ceramic Society Author Loyalty Recognition Award

学术成果
【论著与专利】
主编:新材料概论(冶金工业出版社,2004),新能源材料及其应用技术(清华大学出版社,2005)
参加编写:先进复合材料(机械工业出版社,2003),热电变换材料(日文,日刊工业新闻社,2005)

【代表性论文】
[1]T.-R. Wei, G. Tan, X. Zhang, C.-F. Wu, J.-F. Li, V. P. Dravid, G. G. Snyder, M. G. Kanatzidis, Distinct Impact of Alkali-Ion Doping on Electrical Transport Properties of Thermoelectric p-type Polycrystalline SnSe, Journal of the American Chemical Society, 2016, DOI: 10.102 1/jacs.6b04181.
[2]F.-Z. Yao, K. Wang, W. Jo, K. G. Webber, T. P. Comyn, J.-X. Ding, B. Xu, L.-Q. Cheng, M.-P. Zheng, Y.-D. Hou, J.-F. Li, Diffused phase transition boosts thermal stability of high-performance lead-free piezoelectrics, Advanced Functional Materials, 26(2016)1217-1224.
[3]Y. Pan, J.-F. Li, Thermoelectric performance enhancement in n-type Bi2(TeSe)3 alloys owing to nanoscale inhomogeneity combined with a spark plasma textured-microstructure, NPG Asia Materials, 8(2016)e275
[4]Y. W. Li, F. Li, J. F. Dong, Z. H. Ge, F. Y. Kang, J. Q. He, H. D. Du, B. Li, J.-F. Li, Enhanced Mid-temperature Thermoelectric Performance in Textured SnSe Polycrystals Made of Solvothermally Synthesized Powders, Journal of Materials Chemistry C, 4(2016)2047-2055.
[5]Z.-H. Ge, L-D. Zhao, D. Wu, X. Y. Liu, B.-P. Zhang, J.-F. Li, J. Q. He, Low-cost, abundant binary sulfides as promising thermoelectric materials, Materials Today, 19(2016)227-239.
[6]Li-Qian Cheng, Jing-Feng Li, A review on one dimensional perovskite nanocrystals for piezoelectric applications, Journal of Materiomics, 2(2016)
[7]Chao-Feng Wu, Tian-Ran Wei, Jing-Feng Li, Enhancing average ZT in pristine PbSe by over-stoichiometric Pb addition, APL Materials, 4(2016)104801.
[8]J. Wu, F. Li, T.-R. Wei, Z. H. Ge, F. Kang, J. Q. He, J.-F. Li, Mechanical Alloying and Spark Plasma Sintering of BiCuSeO Oxyselenide: Synthesis Process and Thermoelectric Properties, Journal of The American Ceramic Society, 99(2016)507-514.
[9]Qing Tan, Chao-Feng Wu, Wei Sun and Jing-Feng Li, Solvothermally synthesized SnS nanorods with high carrier mobility leading to thermoelectric enhancement, RSC Advances, 6(2016)43985-43988.
[10]W. Sun, Z. Zhou, J.-F. Li, Sol-gel-processed (001)-textured BiFeO3 thin films on Pt(111)/Ti/SiO2/Si substrates with PbO seeding nanocrystals, RSC Advances, 6(2016)489-494.
[11]W. Sun, J.-F. Li, Q. Yu, L.-Q. Cheng, Phase transition and piezoelectricity of sol-gel-processed Sm-doped BiFeO3 thin films on Pt(111)/Ti/SiO2/Si substrates, Journal of Materials Chemistry C, 3 (2015)2115-212.
[12]J.-S. Zhou, K. Wang, F.-Z. Yao, T. Zheng, J. G. Wu, D. Q. Xiao, J. G. Zhu, J.-F. Li,  Multi-scale thermal stability of niobate-based lead-free piezoceramics with large piezoelectricity, Journal of Materials Chemistry C, 3 (2015) 8780-8787.
[13]Y. Pan, T.-R. Wei,C.-F. Wu, J.-F. Li, Electrical and thermal transport properties of spark plasma sintered n-type Bi2Te3-xSex alloys: combined effect of point defect and Se content, Journal of Materials Chemistry C, 2(2015)17302-17306.
[14]F. Y. Zhu, M. B. Ward, J.-F. Li, S. J. Milne, Core-shell grain structures and dielectric properties of Na0.5K0.5NbO3-LiTaO3-BiScO3 piezoelectric ceramics, Acta Materialia, 90(2015)204-212.
[15]W. Sun, Q. Yu, J. Li, J.-F. Li, Shifted Morphotropic Phase Boundary in [111]-Oriented Nb-Doped Pb(ZrxTi1-x)O3 Epitaxial Films: Insights into Piezoelectricity and Domain Variation, Journal of Physical Chemistry C, 119(2015)19891-19896
[16]C.-F. Wu, T.-R. Wei, J.-F. Li, Electrical and thermal transport properties of Pb1-xSnxSe solid solution thermoelectric materials, Phys. Chem. Chem. Phys., 17(2015), 13006-13012.
[17]T.-R. Wei, C.-F. Wu, X. Z. Zhang, Q. Tan, L. Sun, Y. Pan, J.-F. Li, Thermoelectric transport properties of pristine and Na-doped SnSe1-xTex polycrystals, Phys. Chem. Chem. Phys., 17(2015) 30102-30109.
[18]W. Sun, J.-F. Li, F. Y. Zhu, Q. Yu, L.-Q. Cheng, Z. Zhou, Thickness-dependent phase boundary in Sm-doped BiFeO3 piezoelectric thin films on Pt/Ti/SiO2/Si substrates, Phys. Chem. Chem. Phys., 17( 2015) 19759-19765.
[19]T.-R. Wei, C.-F. Wu, W. Sun, Y. Pan, J.-F. Li, Is Cu3SbSe3 a promising thermoelectric material? RSC Advances, 5(2015) 42848-42854.
[20]F.-Z. Yao, K. Wang, Y. Shen, J.-F. Li, Robust CaZrO3-modified (K, Na)NbO3-based lead-free piezoceramics: High fatigue resistance insensitive to temperature and electric field, Journal of Applied Physics, 118(2015)134102.
[21]F.-Z. Yao, K. Wang, L.-Q. Cheng, X. D. Zhang, W. Zhang, F. Y. Zhu, J.-F. Li, Nanodomain Engineering (K,Na)NbO3 Lead-Free Piezoceramics: Enhanced Thermal and Cycling Reliabilities, Journal of the American Ceramic Society, 98, (2015)448-454.
[22]Y. Pan, T.-R. Wei, Q. Cao, J.-F. Li, Mechanically enhanced p- and n-type Bi2Te3-based thermoelectric materials reprocessed from commercial ingots by ball milling and spark plasma sintering, Materials Science and Engineering B, 197(2015)75-81
[23]Z.-Y. Li and J.-F. Li, Fine-Grained and Nanostructured AgPbmSbTem+2 Alloys with High Thermoelectric Figure of Merit at Medium Temperature, Advanced Energy Materials, 4(2014)1300937.
[24]Q. Tan, L-D. Zhao, J.-F. Li, C.-F. Wu, T.-R. Wei, Z.-B. Xing, M. G. Kanatzidis, Thermoelectrics with earth abundant elements: low thermal conductivity and high thermopower in doped SnS, Journal of Materials Chemistry A, 2(2014)17302-17306.
[25]T.-R. Wei, H. Wang, Z. M. Gibbs, C.-F. Wu, G. J. Snyder, J.-F. Li, Thermoelectric properties of Sn-doped p-type Cu3SbSe4: a compound with large effective mass and small band gap, Journal of Materials Chemistry A, 2(2014)13527-13533
[26]L.-Q. Cheng, K. Wang, J.-F. Li, Y. M. Liu, J. Y. Li, Piezoelectricity of lead-free (K, Na)NbO3 nanoscale single crystals, Journal of Materials Chemistry C, 2(2014)9091-9098. (Front cover article).
[27]L.-Q. Cheng, K. Wang, Q. Yu and J.-F. Li, Structure and composition characterization of lead-free (K, Na)NbO3 piezoelectric nanorods synthesized by molten-salt reaction, Journal of Materials Chemistry C, 2(2014)1519-1524.
[28]Q. Yu, J.-F. Li, F.-Y. Zhu, J.-Y. Li, Domain evolution of tetragonal Pb(ZrxTi1-x) O-3 piezoelectric thin films on SrTiO3 (100) surfaces: combined effects of misfit strain and Zr/Ti ratio, Journal of Materials Chemistry C, 2(2014)5836-5841.
[29]F.-Z. Yao, E. A. Patterson, K. Wang, W. Jo, J. Rodel, J.-F. Li, Enhanced bipolar fatigue resistance in CaZrO3-modified (K,Na) NbO3 lead-free piezoceramics, Applied Physics Letters, 104(2014)242912.
[30]Q. Yu, J.-F. Li, W. Sun, F.-Y. Zhu, Y. M. Liu, Y. Chen, Z. J. Wang and J. Li, Orientation-dependent piezoelectricity and domain characteristics of tetragonal Pb(Zr0.3,Ti0.7)0.98Nb0.02O3 thin films on Nb:SrTiO3 substrates, Applied Physics Letters, 104(2014)012908.
[31]Q. Yu, F.-Y. Zhu, L.-Q. Cheng, K. Wang, J.-F. Li, Determination of crystallographic orientation of lead-free piezoelectric (K, Na)NbO3 epitaxial thin films grown on SrTiO3 (100) surfaces, Applied Physics Letters, 104(2014)102902.
[32]Z.-Y. Li, J.-F. Li, W.-Y. Zhao, Q. Tan, W.-T. Wei, C.-F. Wu, Z.-B. Xing, PbTe-based thermoelectric nanocomposites with reduced thermal conductivity by SiC nanodispersion, Applied Physics Letters, 104(2014)113905.
[33]F.-Z. Yao, Q. Yu, K. Wang, Q. Li, J.-F. Li, Ferroelectric domain morphology and temperature-dependent piezoelectricity of (K,Na,Li)(Nb,Ta,Sb)O3 lead-free piezoceramics, RSC Advances, 4(2014)20062-20068.
[34]F.-Z. Yao, K. Wang, W. Jo, J.-S. Lee, J.-F. Li, Effect of poling temperature on piezoelectricity of CaZrO3-modified (K, Na)NbO3-based lead-free ceramics, Journal of Applied Physics,116, (2014). 114102
[35]Q. Yu, J.-F. Li, Y. Chen, Q.-C. Li, W. Sun, Z. Zhou, Z. J Wang, Effect of Pyrolysis Temperature on Sol-gel Synthesis of Lead-free Piezoelectric (K,Na)NbO3 Films on Nb:SrTiO3 Substrates, Journal of the American Ceramic Society, 97(2014)107-113.
[36]K. Wang, F.-Z. Yao, W. Jo, D. Gobeljic, V. V. Shvartsman, D. C. Lupascu, J.-F. Li, J. Rodel, Temperature-Insensitive (K, Na)NbO3-Based Lead-free Piezoactuator Ceramics, Advanced Functional Materials, 23, 4079-4086 (2013).
[37]J. H. Li, Q. Tan, J.-F. Li, D.-W. Liu, Z.-Y. Li, M. M. Zou, K. Wang, BiSbTe-Based Nanocomposites with High ZT: The SiC Nanodispersion on Thermoelectric Properties, Advanced Functional Materials, 23, 4317-4323(2013).
[38]Y.-L. Pei, J. Q. He, J.-F. Li, F. Li, Q. J. Liu, W. Pan, C. Barreteau, D. Berardan, N. Dragoe, L.-D. Zhao, High thermoelectric performance of oxyselenides: intrinsically low thermal conductivity of Ca-doped BiCuSeO, NPG Asia Materials, 5 (2013)e47.
[39]F. Li, T.-R. Wei, F. Y. Kang, J.-F. Li, Enhanced thermoelectric performance of Ca-doped BiCuSeO in a wide temperature range, Journal of Materials Chemistry A, , 1(2013)11942-11949
[40]L.-Q. Cheng, K. Wang, J.-F. Li, Synthesis of Highly Piezoelectric Lead-Free (K, Na)NbO3 One-dimensional Perovskite Nanostructures, Chemical Communication, 49 (2013) 4003-4005
[41]F.-Z. Yao, J. Glaum, K. Wang, W. Jo, J. Roedel, J.-F. Li, Fatigue-free unipolar strain behavior in CaZrO3 and MnO2 co-modified (K,Na)NbO3-based lead-free piezoceramics, Applied Physics Letters, 103 (2013) 192907
[42]Q. Yu, J.-F. Li, W. Sun, Z. Zhou, Y. Xu, Z.-K. Xie, F.-P. Lai, Q.-M. Wang, Electrical properties of K0.5Na0.5NbO3 thin films grown on Nb:SrTiO3 single-crystalline substrates with different crystallographic orientations, Journal of Applied Physics, 113 (2013) 024101.
[43]F.-Z. Yao, K. Wang, J.-F. Li, Comprehensive Investigation of Elastic and Electrical Properties of Li/Ta-modified (K,Na)NbO3 lead-free Piezoceramics, Journal of Applied Physics, 113 (2013)174105.
[44]J.-J. Zhou, K. Wang, F. Li, J.-F. Li, X.-W. Zhang, and Q.-M. Wang, High and frequency-insensitive converse piezoelectric coefficient obtained in AgSbO3-modified (Li, K, Na)(Nb,Ta)O3 lead-free piezoceramics, Journal of the American Ceramic Society, 96[2] (2013)519-523.
[45]J. H. Li, Q. Tan, J.-F. Li, Synthesis and Property Evaluation of CuFeS2-x as Earth-Abundant and Environmentally-Friendly Thermoelectric Materials, Journal of Alloys and Compounds, 551(2013)143-149.
[46]M. M. Zou, J.-F. Li, T. Kita, Thermoelectric Properties of Fine-Grained FeVSb half-Heusler Alloys Tuned to p-Type By Substituting Vanadium with Titanium, J. Solid State Chem., 198(2013)125-130.
[47]F. Li, J.-F. Li, L.-D. Zhao, K. Xiang, Y. Liu, B.-P. Zhang, Y.-H. Lin, C.-W. Nan, H.-M. Zhu, Polycrystalline BiCuSeO oxide as a potential thermoelectric material, Energy & Environmental Science, 5 (2012) 7188-7195.
[48]F. Li, J.-F. Li, J.-H. Li, F.-Z. Yao, Effect of Cu substitution on microstructure and thermoelectric properties of LaCoO3 ceramics, Physical Chemistry Chemical Physics, 14(2012)12213.
[49]Z.-H. Ge, B.-P. Zhang, J.-F. Li, Microstructure composite-like Bi2S3 polycrystals with enhanced thermoelectric properties, Journal of Materials Chemistry, 22(2012)17589-17594.
[50]Z.-H. Ge, B.-P. Zhang, Y. Liu, J.-F. Li, Nanostructured Bi2-xCuxS3 bulk materials with enhanced thermoelectric performance, Physical Chemistry Chemical Physics, 14 (2012) 4475-4481.
[51]F. Li, J.-F. Li, Enhanced Thermoelectric Performance of Separately Ni-Doped and Ni/Sr-codoped LaCoO3 Nanocomposites, Journal of the American Ceramic Society, 95(2012)3562-3568
[52]Y. Xu, Q. Yu, J.-F. Li, A facile method to fabricate vertically aligned (K, Na)NbO3 lead-free piezoelectric nanorods, Journal of Materials Chemistry, 22(2012)23221.
[53]Q. Yu, J.-F. Li, Z.-X. Zhu, Y. Xu, Q.-M. Wang, Shift of morphotropic phase boundary in high-performance [111]-oriented epitaxial Pb(Zr, Ti)O3 thin films, Journal of Applied Physics, 112 (2012) 014102
[54]J.-J. Zhou, J.-F. Li, X.-W. Zhang, Orthorhombic to tetragonal phase transition due to stress release in (Li,Ta)-doped (K,Na)NbO3 lead-free piezoceramics, Journal of the European Ceramic Society, 32 (2012)267-270.
[55]Q. Yu, J.-F. Li, Z.-X. Zhu, Y. Xu, Q.-M. Wang, Shift of morphotropic phase boundary in high-performance [111]-oriented epitaxial Pb(Zr, Ti)O3 thin films, Journal of Applied Physics, 112 (2012)014102.
[56]Y. Xu, J.-F. Li, J. Ma and C.-W. Nan, Microscale 1-3-type lead-free piezoelectric/ferrite composites fabricated by a modified dice-and-fill method, Journal of Physics D: Applied Physics, 45 (2012) 315306
[57]D.-W. Liu, J.-F. Li, Microfabrication of thermoelectric modules by patterned electrodeposition using a multi-channel glass template, Journal of Solid State Electrochemistry, 15 (2011)479-484.
[58]Z.-H. Ge, B.-P. Zhang, Y.-X. Chen, Z.-X. Yu, Y. Liu, J.-F. Li, Synthesis and transport property of Cu1.8S as a promising thermoelectric compound, Chemical Communication, 47 (2011) 12697–12699.
[59]Z.-H. Ge, B.-P. Zhang, P.-P. Shang, J.-F. Li, Control of anisotropic electrical transport property of Bi2S3 thermoelectric polycrystals. Journal of Materials Chemistry, 21 (2011) 9194-9200.
[60]Y. Liu, L.-D. Zhao, Y. Liu, J. Lan, W. Xu, F. Li, B.-P. Zhang, D. Berardan, N. Dragoe, Y.-H. Lin, C.-W. Nan, J.-F. Li, and H. Zhu, Remarkable Enhancement in Thermoelectric Performance of BiCuSeO by Cu Deficiencies, Journal of the American Chemical Society, 133 (2011)20112-20115.
[61]K. Wang, J.-F. Li, Domain Engineering of Lead-Free Li-Modified (K,Na)NbO3 Polycrystals with Highly Enhanced Piezoelectricity, Advanced Functional Materials, 20 (2010) 1924–1929.
[62]J.-F. Li, Z.-X. Zhu, and F.-P. Lai, Thickness-Dependent Phase Transition and Piezoelectric Response in Textured Nb-Doped Pb(Zr0.52Ti0.48)O3 Thin Films, J. Phys. Chem. C, 114, 41, (2010)17796-17801.
[63]Z.-Y. Shen, J.-F. Li, R. M. Chen, Q. Zhou, K. K. Shung, Microscale 1-3-Type (Na,K)NbO3-Based Pb-Free Piezocomposites for High-Frequency Ultrasonic Transducer Applications, Journal of the American Ceramic Society, 94 (2011) 1346-1349.
[64]S. Y. Xu and J.-F. Li, Synthesis and Piezoelectricity of Single-Crystalline (K,Na)NbO3 Nanobars, Journal of the American Ceramic Society, 94 (2011) 3812-3818.
[65]T. F. Yin, D. W. Liu, Y. Ou, F. Y Ma, S. H. Xie, J.-F. Li, J. Y. Li, Nanocrystalline Thermoelectric Ca3Co4O9 Ceramics by Sol-Gel Based Electrospinning and Spark Plasma Sintering, J. Phys. Chem. C, 114(2010)10061-10065.   
[66]F.Y. Ma, Y. Ou, Y. Yang, Y. M. Liu, S. H. Xie, J.-F. Li, G. Z. Cao, R. Proksch, J. Y. Li,  Nanocrystalline Structure and Thermoelectric Properties of Electrospun NaCo2O4 Nanofibers, J. Phys. Chem. C, 114 (2010) 22038–22043.
[67]M. M. Zou, Jing-Feng Li, Peijun Guo and Takuji Kita, Synthesis and thermoelectric properties of fine-grained FeVSb system half-Heusler compound polycrystals with high phase purity, J. Phys. D: Appl. Phys. 43 (2010) 415403.
[68]D.-W. Liu, J.-F. Li, C. Chen, B.-P. Zhang, L.L.Li, Fabrication and evaluation of microscale thermoelectric modules of Bi2Te3-based alloys, J. Micromech. Microeng. 20 (2010) 125031.
[69]Z.-X. Zhu, J.-F. Li, Y. Y.Liu, J. Y. Li, Shifting of morphotropic phase boundary and superior piezoelectric response in Nb-doped Pb(Zr,Ti)O3 epitaxial thin films, Acta Materialla, 57 (2009) 4288–4295
[70]F. P. Lai, J.-F. Li, Z.-X. Zhu and Y. Xu, Influence of Li content on electrical properties of highly piezoelectric (Li, K, Na)NbO3 thin films prepared by sol-gel processing, Journal of Applied Physics, 106 (2009) 064101.
[71]Z.-Y. Shen, Y. Xu, and J.-F. Li, Fabrication and electromechanical properties of microscale 1-3-type piezoelectric composites using (Na,K)NbO3-based Pb-free piezoceramics, Journal of Applied Physics, 105(2009)104103.
[72]L.D. Zhao, B.-P. Zhang, W.S. Liu, J.-F. Li, Effect of mixed grain sizes on thermoelectric performance of Bi2Te3 compound, Journal of Applied Physics, 105 (2009) 023704.
[73]M. Zhou, J.-F. Li, T. Kita, Nanostructured AgPbmSbTem+2 system bulk materials with enhanced thermoelectric performance, Journal of the American Chemical Society, 130, 4527-4532 (2008).
[74]W. S. Liu, B.-P. Zhang, L.-D. Zhao and J.-F. Li, Improvement of thermoelectric performance of CoSb3-xTex skutterudite compounds by additional substitution of IVB-group elements for Sb, Chemistry of Materials, 20, 7526-7531 (2008).
[75]H. Wang, J.-F. Li, M. M. Zou, T. Sui, Synthesis and transport property of AgSbTe2 as a promising thermoelectric compound, Applied Physics Letters, 93, 202106 (2008)
[76]W-S. Liu, L-D. Zhao, B.-P. Zhang, H.-L. Zhang, J.-F. Li, Enhanced thermoelectric property originating from additional carrier pocket in skutterudite compounds, Applied Physics Letters, 93, 042109 (2008).
[77]D. W. Liu, J.-F. Li, Electro-crystallization process during deposition of Bi-Te films, Journal of The Electrochemical Society, 155(7), D493-D498 (2008).
[78]L.-D. Zhao, B.-P. Zhang, J.-F. Li, M. Zhou, W.-S. Liu and J. Liu, Thermoelectric and mechanical properties of nano-SiC-dispersed Bi2Te3 fabricated by mechanical alloying and spark plasma sintering, Journal of Alloys and Compounds, 455, 259-264, (2008).
[79]L.D. Zhao, B.-P. Zhang, J.-F. Li, H. L. Zhang, W.S. Li, Enhanced thermoelectric and mechanical properties in textured n-type Bi2Te3 prepared by spark plasma sintering, Solid State Science, 10, 651-658, (2008).
[80]K. Wang, J.-F. Li and N. Liu, Piezoelectric properties of low-temperature sintered Li-modified (Na, K)NbO3 lead-free ceramics, Applied Physics Letters, 93 (2008)092904.
[81]Y-R Zhang, J.-F. Li, B.-P. Zhang, C-E Peng, Piezoelectric and Ferroelectric Properties of Bi-Compensated (Bi1/2Na1/2)TiO3-(Bi1/2K1/2)TiO3 Lead-Free Piezoelectric Ceramics, Journal of Applied Physics, 103 (2008) 074109.
[82]Z.-X. Zhu, C. Ruangchalermwong, and J.-F. Li, Thickness and Nb-doping effects on ferro- and piezoelectric properties of highly a-axis-oriented Nb-doped Pb(Zr0.3Ti0.7)O3 films, Journal of Applied Physics, 104 (2008) 054107.
[83]Y. H. Zhen, J.-F. Li, Preparation and Electrical Properties of Fine-Scale 1-3 PZT/Epoxy Composite Thick Films for High-Frequency Ultrasonic Transducers, Journal of Applied Physics, 103, 084119 (2008).
[84]W. S. Liu, B. P. Zhang, J.-F. Li, H.-L. Zhang, L. D. Zhao, Enhanced thermoelectric properties in CoSb3-xTex alloys prepared by mechanical alloying and spark plasma sintering, Journal of Applied Physics, 102, 103717 (2007).
[85]H. L. Zhang, J.-F. Li, B.-P. Zhang, K. F. Yao, W.S. Liu, and H. Wang, Electrical and thermal properties of carbon nanotube bulk materials: Experimental studies for the 328–958 K temperature range, Physical Review B, 75,205407 (2007).
[86]M. Zhou, L. D. Chen, C. D. Feng, D. L. Wang, J.-F. Li, Moderate-temperature thermoelectric properties of TiCoSb-based half-Heusler compounds Ti1-xTaxCoSb, Journal of Applied Physics, 101, 113714, (2007).
[87]K. Wang, J.-F. Li, Analysis of crystallographic evolution in (Na,K)NbO3-based lead-free piezoceramics by x-ray diffraction, Applied Physics Letters, 91(2007) 262902.
[88]Z.-X. Zhu, J.-F. Li, F.-P. Lai, Y. Zhen, Y.-H. Lin, C.-W. Nan, L. T. Li, J. Y. Li, Phase structure of epitaxial Pb(Zr,Ti)O3 thin films on Nb-doped SrTiO3 substrates, Applied Physics Letters, 91, (2007)222910.
[89]Y. H. Zhen and J.-F. Li, Abnormal Grain Growth and New Core–Shell Structure in (K,Na)NbO3-Based Lead-Free Piezoelectric Ceramics, Journal of the American Ceramic Society, 90 [11] 3496-3502 (2007).
[90]P. Zhao, B.-P. Zhang, J.-F. Li, Enhancing piezoelectric d33 coefficient in Li/Ta–codoped lead–free (Na, K)NbO3 ceramics by compensating Na and K at a fixed ratio, Applied Physics Letters, 91, (2007)172901.
[91]P. Zhao, B.-P. Zhang, and J.-F. Li, High piezoelectric d33 coefficient in Li-modified lead-free (Na,K)NbO3 ceramics sintered at optimal temperature, Applied Physics Letters, 90 (2007) 242909.
[92]H. L. Zhang, J.-F. Li, B. P. Zhang, Microstructure and electrical properties of porous PZT ceramics derived from different pore-forming agents, Acta Materialla 55 (2007) 171-181.
[93]W. S. Liu, B. P. Zhang, J.-F. Li, L. D. Zhao, Thermoelectric property of fine-grained CoSb3 skutterudite compound fabricated by mechanical alloying and spark plasma sintering, Journal of Physics D- Applied Physics 40 (2): 566-572 (2007)
[94]H. Wang, J.-F. Li, C.-W. Nan, M. Zhou, W.S. Liu, B.-P. Zhang and T. Kita, High-Performance Ag0.8Pb18+xSbTe20 thermoelectric bulk materials fabricated by mechanical alloying and spark plasma sintering, Applied Physics Letters, 88 (9) 092104 (2006).
[95]J.-F. Li and J. Liu, Effect of nano-SiC dispersion on thermoelectric properties of Bi2Te3 polycrystals, phys. stat. sol. (a) 203, No. 15, 3768–3773 (2006)
[96]H. L. Zhang, J.-F. Li, K. F. Yao, L. D. Chen, Spark plasma sintering and thermal conductivity of carbon nanotube bulk materials, Journal of Applied Physics, 97, 114310 (2005).
[97]J.-F. Li, K. Wang, B. P. Zhang, L. M. Zhang, Ferroelectric and piezoelectric properties of fine-grained Na0.5K0.5NbO3 lead-free piezoelectric ceramics prepared by spark plasma sintering, Journal of the American Ceramic Society 89 (2006) 706-709.
[98]Y. H. Zhen, J.-F. Li, Normal sintering of (K,Na)NbO3-based ceramics: Influence of sintering temperature on densification, microstructure, and electrical properties, Journal of the American Ceramic Society, 89 (2006)3669-3675.
[99]H. L. Zhang, J.-F. Li and B.-P. Zhang, Sintering and Piezoelectric Properties of Co-Fired PZT/Ag Composites, Journal of the American Ceramic Society, 89 (2006)1300-1307
[100]B.-P. Zhang, J.-F. Li, K. Wang, H. L. Zhang , Compositional Dependence of Piezoelectric Properties in NaxK1-xNbO3 Lead-Free Ceramics Prepared by Spark Plasma Sintering, Journal of the American Ceramic Society, 89 (2006)1605-1609
[101]W. Gong, J.-F. Li, C.-E Peng, Z. Gui and L. Li, In-Plane Aligned Pb(Zr, Ti)O3 Microbelts Fabricated by Near Migration and Restricted Growth, Advanced Materials, 17 (2005) 1952+.
[102]C. Peng, J.-F. Li, W. Gong, Preparation and properties of (Bi1/2Na1/2)TiO3-Ba(Ti,Zr)O3 lead-free piezoelectric ceramics, Materials Letters 59 (2005) 1576-1580.
[103]W. Gong, J.-F. Li, X. C. Chu, Z. L. Gui, and L. T. Li, Preparation and characterization of sol-gel derived Pb(Zr,Ti)O3 thin films: PbO seeding effect on the formation of (001) preferential orientation, Acta Materialia., 52 (2004) 2787-2793.
[104]W. Gong, J.-F. Li, X. C. Chu, Z. L. Gui and L. T. Li , Combined effect of preferential orientation and Zr/Ti atomic ratio on electrical properties of Pb(ZrxTi1-x)O3 thin films, Journal of Applied Physics, 96 (2004) 590-595.
[105]W. Gong, J.-F. Li, X. C. Chu, Z. L. Gui and L. T. Li , Single-crystal Nb-doped Pb(Zr,Ti)O3 thin films on Nb-doped SrTiO3 wafers with different orientations, Applied Physics Letters,85 (2004)3818-3820.
[106]W. Gong, J.-F. Li, X. Chu and L. Li, Effect of Pyrolysis Temperature on Preferential Orientation and Electrical Properties of Sol-gel Derived Lead Zirconate Titanate Films, Journal of the European Ceramic Society, 24 (2004) 2977-2982.
[107]J.-F. Li, S. Tanaka, T. Umeki, S. Sugimoto, M. Esashi, R. Watanabe, Microfabrication of Thermoelectric Microdevices by Silicon Molding Process, SENSORS AND ACTUATORS A-PHYSICAL 108 (2003)97-102.
[108]J.-F. Li, K. Takagi, N. Terakubo, R. Watanabe, Electrical and mechanical properties of piezoelectric ceramic/metal composites in the Pb(Zr,Ti)O3/Pt system, Applied Physics Letters, 79, (2001)2441-2443.
[109]J.-F. Li, W. Pan, F. Sato, R. Watanabe, Mechanical Properties of Polycrystalline Ti3SiC2 at Ambient and Elevated Temperatures, Acta Materialia, 49,937-945 (2001).
[110]S. Wang, J.-F. Li, K. Wakabayashi, M. Esashi, R. Watanabe, Lost Silicon Mold Process for PZT Microstructures, Advanced Materials 11 (1999)873-876
[授权专利]
[1]铌酸钾钠基无铅压电陶瓷及其制备方法, ZL2013 1 0237035.2
[2]具有微米级热电臂的微型热电元件的微加工方法, ZL200410038297.7
[3]一种氮化硅陶瓷部件的微加工方法,ZL200510011255.9
[4]钛酸铋钠-锆钛酸钡无铅压电陶瓷及其制备方法,ZL200410088425.9
[5]铌酸钾钠系无铅压电陶瓷及其制备方法,ZL200410068962.7
[6]一种压电陶瓷膜的制备方法, ZL200510063084.4
[7]一种纳米SiC/Bi2Te3基热电材料的制备方法, ZL200510130794.4
[8]Ag-Pb-Sb-Te热电材料及其制备方法, ZL200510114218.0
[9]金属材料和陶瓷材料对称梯度复合材料的制备方法, ZL200610089765.2
[10]一种多孔压电陶瓷及其制备方法,ZL200610114599.7
[11]纳米SiC颗粒复合CoSb3基热电材料及其制备方法,ZL200610144006.1
[12]一种细晶择优取向 Bi2Te3 热电材料的制备方法,ZL200710175308.X
[13]一种提高Ag-Pb-Sb-Te热电材料性能的方法,ZL200810103887.1
[14]一种TiNiSn基热电化合物的制备方法,ZL200810119192.2
[15]一种四元方钴矿结构的热电材料及其制备方法,ZL200810119808.6
[16]一种提高Bi-S二元体系热电材料性能的方法,ZL200810211660.9
[17]一种制备具有高纵横比热电臂的微型热电器件的方法,ZL200810239624.3
[18]一种超微细压电陶瓷阵列结构复合材料及其制备方法,ZL200910076528.6
[19]一种Ag纳米颗粒复合CoSb3基热电材料的制备方法,ZL200810119809.0
[20]无铅压电陶瓷/聚合物1-3结构复合材料及其加工方法,ZL200810103886.7
[21]化合物熱電材料およびその製造方法,日本专利特许第4291842号
[22]太陽光熱複合発電システムにおける太陽熱集熱体および該太陽熱集熱体を利用した太陽光熱発電モジュール,2011年授权,日本专利特许第4878382号
[23]太阳热集热体以及太阳光热发电模块, ZL201010108115.4
[24]一种Sn-S基热电化合物及其制备方法, ZL201210265582.7
[25]铌酸钾钠基无铅压电陶瓷及其制备方法, ZL2013 1 0237035.2


【研究组主要成员】
职员:
王轲(副教授),王馡丽(秘书),赵磊(博士后),李志亮(博士后),罗进(博士后)
学生:
孙伟(D5),魏天然(D5),吴超峰(D4),潘瑜(D4),周朕(D3),刘庆(D3),Asfandiyar(D3),Huan-Young Lee(D3),董金峰(D2),孙富华(D2),高静(D1),唐怀超(D1),裴俊(D1,北科大),李琦(M3),门天路(M2), 张茂华(M1)


【工作或学习过的成员及其研究课题】
职员:
金松哲(访问学者,长春工业大学副教授,2003.10-2005.2,现长春工业大学教授):热电器件用梯度电极材料
桑红毅(访问学者,中国农业大学理学院物理系,2008.9-2009.7):氧化物材料热电性质的研究
张海龙(博士后,2003.9-2005.9,现北京科技大学):陶瓷/金属功能梯度压电驱动器的研究
周敏(博士后, 2005.10-2007.9,现中科院理化技术研究所):高性能热电化合物材料
沈宗洋(博士后,2008.2-2010.3,现景德镇陶瓷学院):铌酸钠钾基无铅压电陶瓷及其1-3复合材料制备及性能研究
李建辉(博士后,2010.9-2012.12):热管理材料与高性能纳米复合热电材料
朱方圆(博士后,2013.5-2015.7):BiScO3与BaZrO3掺杂的(Li,K,Na)(Nb,Ta)O3无铅压电陶瓷结构与性能研究
张瑜(实验员+秘书,2007-2008),
焦阳(实验员+秘书,2007.12-2009.5)
王琳(秘书,2009.7-2011.12)
赵金涛(实验员,2010.10-2011.2)
博士生:
龚文(博士,2002.9-2006.2):压电薄膜材料制备与性能研究
甄玉花(博士,2004.9-2008.2): 铌酸钾钠基无铅压电陶瓷及其1-3型压电复合材料的研究
刘炜书(博士,BUST,2004-2008.10):CoSb3基材料的合成机理、微观结构与热电输运性能的研究
赵立东(博士,BUST,2005-2008.10):碲化铋和硫化铋热电材料的制备与性能研究
王轲(博士,2005.9-2010.2):铌酸钾钠基无铅压电陶瓷材料(获清华大学优秀博士论文)
赖风平(博士,2005.9-2010.2):铌酸钾钠基无铅压电薄膜的制备与性能研究
祝志祥(博士,2006.9-2010.2):织构及外延压电薄膜的化学法制备与性能研究
刘大为(博士,2006.9-2011.6):热电模块的微型化及Bi2Te3基热电材料的相关制备技术
徐莹(博士,2008.9-2012.6):无铅压电陶瓷有序复合微结构的制备和性能研究
邹敏敏(博士,2008.9-2012.6):TiNiSn和FeVSb基半哈斯勒合金的制备与热电性能
李甫(博士,2009.9-2013.1):低热导氧化物陶瓷的微结构调控及其热电性能研究
周佳骏(博士,2010.9-2013.1):铌酸钾钠基无铅压电陶瓷的相结构和性能调控
李宗岳(博士,2009.9-2014.6):银铅锑碲化合物热电材料的制备工艺与性能优化的研究
郁琦(博士,2010.9-2015.1):溶胶凝胶法制备外延压电薄膜的相结构及电学性能
程丽乾(博士,2010.9-2015.1):铌酸钾钠基一维无铅压电纳米材料研究
谭晴(博士,2011.9-2016.6) :Sn?S基化合物热电材料的制备及其性能
姚方周(博士,2011.9-2016.6):铌酸钾钠基无铅陶瓷的压电及其稳定性研究
刑志波(博士,2011.9-2016.6):SnTe基无铅热电材料的制备工艺与性能优化研究
硕士生:
刘静(硕士,2002.9-2005.7):碲化铋热电材料的制备及其微成型技术研究
康妮(硕士,2003.9-2005.7):锆钛酸铅陶瓷厚膜电泳沉积技术研究
程达明(硕士,2003.9-2005.7):PLZT光致伸缩陶瓷的制备及其性能与组分关系研究
彭春娥(硕士,2004.9-2006.7):钛酸铋钠基无铅压电陶瓷的制备和性能
王衡(硕士,2005.9-2008.7)AgPb18+xSbTe20高性能热电化合物的制备,结构表征及工艺优化(硕士论文,同时参加清华大学-东京工业大学双硕士学位培养项目)
张怀全(硕士,2004.9-2006.7):金属/陶瓷梯度复合热电器件电极材料的制备
隋涛(硕士,长春工大,2007.1-2008.7):金属与陶瓷梯度复合热电电极的制备
及其与热电材料连接的研究
张雅茹(硕士,北科大,2006.9-2007.12)NBT-KBT无铅压电陶瓷的制备和性能研究
刘楠(M2,陕西师范大学, 2007.9-2009.6): 铌酸钾钠无铅压电陶瓷的水热制备和放电等离子烧结
马宁(M2,北科大,2008.9-2010.6): ZnO基热电材料的制备及其性能研究
陈晨(硕士,北科大,2009.9-2010.12):(Bi,Sb)2Te3基热电材料的制备及其性能研究
于昭新(硕士,北科大,2010.9-2011.12):Ag0.8Pb22.5SbTe20基块体材料热电性能研究
曹玉超(硕士,北科大,2012.9-2014.12):Y2O3涂层和块体材料的等离子体刻蚀行为及机理的研究
张瑞(硕士,北科大,2012.9-2014.12):LaCoO3与Bi2Mo2O9的低热导特性研究与调控
本科生:
康妮(本科,2003.2-2003.7):PZT粉末电泳沉积微成型技术研究(综合论文训练)
程达明(本科,2003.2-2003.7):改性锆钛酸铅陶瓷的光致伸缩效应研究(综合论文训练)
赖风平(本科,2004.2-2004.7):铌酸盐体系无铅压电陶瓷薄膜的溶胶凝胶法制备(综合论文训练)
彭春娥(本科,2004.2-2004.7):(Bi,Na)TiO3-BaTiO3体系压电陶瓷的制备与性能研究(综合论文训练)
王衡(本科,2005.2-2005.7); Ag-Pb-Sb-Te系化合物的制备与热电性能评价(综合论文训练)
刘大为(本科,2006.2-2006.7):利用MEMS及电化学工艺制作热电微结构(综合论文训练)
霍沫霖(本科,2006.2-2006.7):Se掺杂Bi2Te3的MA-SPS制备及其热电性能研究(综合论文训练)
何庆(本科,2006.2-2006.7):锆钛酸铅厚膜的电泳沉积制备及电学性能表征(综合论文训练)
徐莹(本科,2007.2-2007.7):铌酸钾钠无铅压电陶瓷薄膜及其陈列的溶胶-凝胶法制备(综合论文训练)
邹敏敏(本科,2007.2-2007.7):TiNiSn基half-Heusler化合物的制备及其热电性能的研究(综合论文训练)
徐钰丰(本科,2007.2-2007.7):压电陶瓷厚膜的电泳沉积制备及性能研究(综合论文训练)
杜冰(本科,2008.2-2008.7):利用机械合金化和放电等离子体烧结工艺制备单相TiNiSn热电材料(综合论文训练)
郭沛君(本科,2009.2-2009.7):VFeSb基Half-Heusler化合物的制备及其热电性能(综合论文训练)
胡永杰(本科,2010.2-2010.7):热导率温度相关性可控复合材料的设计与制备(综合论文训练)
李天天(本科,2010.2-2010.7):硅片的纳米球光刻工艺研究(综合论文训练)
徐思杨(本科,2010.2-2010.7):KNN基无铅压电氧化物纳米线的合成(综合论文训练)
向凯(本科,2011.2-2011.7):BiCuSeO化合物的合成和热电性能研究(综合论文训练)
谭晴(本科,2011.2-2011.7):SnS化合物的MA+SPS法合成及其热电性能的研究(综合论文训练)
姚方周(本科,2011.2-2011.7):Li掺杂铌酸钾钠基无铅压电陶瓷结构与性能的调控(综合论文训练)
孙伟(本科,2012.2-2012.7):硅片上择优取向BiFeO3薄膜的溶胶凝胶法制备(综合论文训练)
许子豪(本科,2012.2-2012.7):铌酸钾钠无铅压电陶瓷的水热合成(综合论文训练)
魏天然(本科,2012.2-2012.7):Sb2Se3和Cu3SbSe4热电材料制备与性能评价(综合论文训练)
吴超峰(本科,2013.2-2013.7):PbSe热电材料制备及改性研究(综合论文训练)
周朕(本科,2014.2-2014.7):溶胶凝胶法制备钛酸铋钠-钛酸钡无铅压电薄膜
赵文洋(本科,2014.2-2014.7):LAST基热电材料的性能增强及其电极材料研究
董金峰(本科,2015.2-2015.7):锰硅体系热电材料的制备与性能研究
丁子轩(本科,2016.2-2016.7):晶粒尺寸对AgSbO3改性(Li,K,Na)(Nb,Ta)O3压电陶瓷电学性能的影响
短期留学生:
2007.8-2008.7,Charnwit Ruangchalermwong,(博三,泰国Prince of Songkla University)
2007.5-2007.8,Christy Hydrean & Fang Li,University of Pittsburgh
2015.1-2015.6,Muhammad Saleem Mirza(巴基斯坦政府派遣短期留学生)
博士后招聘信息
随时招收博士若干名,从事压电陶瓷﹑热电材料﹑MEMS材料技术等方面的研究。

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发表于 2017-3-11 19:52:44 | 只看该作者
清华大学材料学院李敬锋教授在高性能无铅压电陶瓷研究方面取得进展

          压电陶瓷能够实现机械能和电能的相互转化,广泛应用于传感器、换能器和驱动器等。以锆钛酸铅(简称PZT)为代表的传统铅基陶瓷虽然性能优异,但铅的毒性对环境和健康提出了严重的挑战。铌酸钠钾(KNN)基陶瓷由于其较高的压电系数和居里温度被认为是最具潜力的无铅压电陶瓷体系之一。
          清华大学材料学院李敬锋教授、王轲副教授及其团队一直从事无铅压电材料研究,最近在提高KNN基无铅材料温度稳定性方面取得重要进展。该课题组最近的研究发现,通过在KNN基陶瓷中掺杂适量MnO2可获得高达470 pm/V的室温压电应变常数d33*,此性能与PZT陶瓷性能相当。并且,该无铅压电陶瓷表现出优异的温度稳定性,在100 oC时仍然能够输出430 pm/V的压电应变,明显优于其它已报道的无铅陶瓷组分。论文发表于Journal of the American Chemical Society, DOI: 10.1021/jacs.7b00520,材料学院2016级硕士研究生张茂华为第一作者,王轲副教授为通讯作者。
          该课题组与四川大学和新加坡国立大学合作,近期在关于KNN基陶瓷的压电响应机理研究方面也取得进展,通过使用PFM压电原子力显微术对压电陶瓷表面进行纳米尺度表征,揭示了KNN基材料的高压电活性与纳米铁电畴的关联性,在著名期刊Energy & Environmental Science上报道了关于KNN基陶瓷的高压电性起源研究成果(Energy Environ. Sci., DOI: 10.1039/c6ee03597c)。王轲副教授为该论文的共同通讯作者。
           上述工作得到了国家自然科学基金委重点基金、清华大学自主科研基金等项目的支持。

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板凳
发表于 2018-4-5 09:45:26 | 只看该作者
Enhanced thermoelectric performance of Cu12Sb4S13−δ tetrahedrite via nickel doping
孙富华, 董金峰, Shaugath Dey, Asfandiyar, 吴超峰, 潘瑜, 唐怀超, 李敬锋*
Ni掺杂提高Cu12Sb4S13−δ黝铜矿热电性能

摘要: Cu12Sb4S13是一种储量丰富、环境友好的天然矿物, 被热电领域普遍关注. 本研究旨在揭示Ni掺杂提高黝铜矿材料热电性能的机理. 采用机械合金化(MA)结合放电等离子体烧结(SPS)的方法制备出Cu12−xNixSb4S13−δ(x = 0.5, 0.7, 1.0, 1.5, 2.0)样品. 实验结果表明, 在测量温度范围内(323–723 K), 随着Ni含量的增加, 样品的热导率急剧下降(< 0.9 W m−1 K−1), 同时热电功率因子逐渐增加. 理论模型计算表明, 晶格热导率的降低主要来源于Ni掺杂引起的析出相及位错对中频声子的强散射作用. 由于较低的热导率和较高的功率因子, Cu11NiSb4S13−δ样品在723 K时获得最高ZT值0.95, 相对于未掺杂样品, 其热电性能提高了46%. 同时, 热循环测试表明, 通过Ni掺杂提高了黝铜矿热电材料的化学稳定性.


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地板
发表于 2018-7-24 09:25:14 | 只看该作者
本帖最后由 bangongshi 于 2018-7-24 09:29 编辑

李敬锋课题组在热电材料制备工艺与微纳结构调控研究方面取得进展

  热电材料与器件是近年来能源材料领域的研究热点,其中具有较高热电优值的BiSbTe材料在固态电子制冷和低中温废热发电等领域有着几乎不可替代的应用,如何进一步提升其热电性能一直备受关注。李敬锋教授课题组与美国西北大学材料系Jeffrey Snyder教授课题组合作开发了一种固液相共存熔融离心工艺,成功在BiSbTe热电材料中引入了大量位错阵列和微孔。微孔和位错显著降低了热电材料的热导率,相比传统区熔铸锭,晶格热导率降低60%,从而显著提高了热电性能。系统的Debye模型分析表明微孔和位错对热导率降低的贡献各占50%。

   
此次论文第一作者为材料学院2013级博士生潘瑜,通讯作者为清华大学材料学院李敬锋教授,美国西北大学材料学院Jeffrey Snyder教授以及西北大学博士后Umut Aydemir。该工作得到了国家自然科学基金委科学中心项目、973项目和国家留学基金委等项目的支持。李敬锋教授课题组一直关注碲化铋等商用热电材料的结构调控和性能提升机理研究,在点缺陷、纳米复合结构调控以及织构化工艺等方面发表了一系列论文(AFM2013、JMCC2015、NPG Asia Mater 2016、Adv Sci 2017)。



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5#
发表于 2018-9-19 17:02:28 | 只看该作者
  第15届日本热电学会2018年度学术会议于2018年9月13-15日在日本仙台市召开。材料学院李敬锋教授受邀作了题为“纳米复合提高热电性能(Enhancing Thermoelectric Performance by Creating Nanocomposites)”的唯一特邀报告(Plenary Talk),重点介绍了其课题组在高性能热电材料研发与纳米复合增强热电性能机理研究的最新进展。报告赢得与会者的广泛关注,并得到日本热电学会前会长Kunihito Koumoto教授、亚洲热电学会会长Takao Mori教授等专家的高度赞赏。
       这次会议由日本热电学会主办,日本物理学会、日本应用物理学会、日本金属学会、日本粉体粉末冶金协会等协办,共约250人参会。

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发表于 2019-1-22 09:01:06 | 只看该作者
清华李敬锋Nano Energy : 基于Cu12Sb4S13四面体的热电纳米复合材料及其热电性能增强



四面体Cu12Sb4S13(缩写为CAS)是一种天然矿物,由于其廉价的组成元素和复杂的Sb[CuS3]Sb结构而引起了人们的极大关注。尽管CAS具有超低的晶格热导率,但由于其相对较低的功率因数(S2σ),其TE性能仍然低于其他高性能TE材料。功率因数依赖于材料结构。因此,通过引入纳米级结构可优化电传输性能,从而将简单的制造过程结合到基底中,同时保持低导热性,能够进一步实现CAS可调的TE性能。虽然引入纳米结构是提高材料热电性能的有效方法之一,但其在CAS四面体中尚未得到应用。

近日,清华大学李敬锋教授等采用机械合金化(MA)和放电等离子烧结(SPS)相结合的简便方法合成了Nb2O5纳米颗粒分散的Cu11.5Ni0.5Sb4S13-δ复合材料,并在Nano Energy上发表了题为“Enhanced performance of thermoelectric nanocomposites based on Cu12Sb4S13 tetrahedrite”的研究论文。通过重复的MA和SPS工艺得到的细粒纳米结构提高了整个温度范围内的电导率和功率因数。由于强烈的低中频声子散射,均匀分布的Nb2O5纳米颗粒和纳米孔将晶格热导率有效降低至0.6 W·m-1·K-1。少量的Nb2O5添加(0.3 vol %)使得723K时ZT值高达1.2,与基底样品相比增加~50%。上述纳米复合材料还具有高平均ZT值、热电转换效率和断裂韧性。

综上所述,作者通过简单的机械合金化和放电等离子烧结工艺合成了Cu11.5Ni0.5Sb4S13-δ-x vol % Nb2O5热电四面体,其中Nb2O5纳米颗粒和纳米孔在晶界中均匀分布。反复研磨和SPS工艺改善了导电性,有助于细粒纳米结构和增强的合金化过程。由于Nb2O5纳米颗粒引入纳米缺陷诱导的声子散射,导热率在整个温度范围内显著降低。少量的Nb2O5添加(0.3 vol %)使得723K时ZT值高达1.2。此外,CNAS-0.3NP具有高ηmax、ZTave和KIC值,表明纳米结构能够有效提高四面体材料的高热电转换效率和器件可靠性。

文献链接:Enhanced performance of thermoelectric nanocomposites based on Cu12Sb4S13tetrahedrite (Nano Energy, 2019, DOI: 10.1016/j.nanoen.2018.12.090)



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发表于 2020-6-10 14:53:41 | 只看该作者
   2020年6月9日获悉,近日,美国陶瓷学会(The American Ceramic Society)公布新增会士(Fellow),以表彰他们在陶瓷科学研究与陶瓷工程化应用方面的突出贡献,材料学院李敬锋教授当选。
        美国陶瓷学会成立于1898年,是国际材料领域最有影响力的学会之一,现有会员12000多人。今年增选会士23名,李敬锋教授是唯一一位来自中国研究机构的学者。
        李敬锋简介:清华大学材料学院教授。1984年毕业于华中科技大学,1991年获日本东北大学博士学位,1992-2002年任日本东北大学助理教授、副教授,2002年回国任清华大学教授,2003年获国家杰出青年基金,2008年入选教育部长江学者特聘教授。目前任Journal of Materiomics主编、《硅酸盐学报》副主编、中国材料研究学会热电材料与应用分会主任、中国硅酸盐学会微纳技术分会副理事长、中国硅酸盐学会薄膜与涂层分会副理事长。

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发表于 2022-2-18 16:34:10 | 只看该作者
2月8日,日本工程院第41次理事会通过,清华大学材料学院李敬锋教授当选为日本工程院外籍院士。
        日本工程院(The Engineering Academy of Japan)成立于1987年,由大学、产业界以及国家机关中在工程及科学技术相关领域做出卓越贡献,并具有重要领导和指导地位的人士组成,目前有院士828名,外籍院士47名。日本工程院于1990年加盟国际工程院联盟(CAETS),在国际上具有重要影响力。
         李敬锋于1991年获日本东北大学博士学位,1992年至2002年任该校助理教授、副教授,2002年回国任清华大学教授至今,长期从事材料科学与技术研究工作,特别在无铅铁电压电陶瓷与热电材料及其微器件技术等研究方向取得一系列原创成果,发表论文500余篇,被引23000余次(H因子79),多次在重要国际会议上做大会邀请报告,出版专著《Lead-free Piezoelectric Materials》(Wiley出版社)等三部。曾获国家杰出青年基金和“长江学者奖励计划”资助,现任《Journal of Materiomics》主编、《硅酸盐学报》副主编,国际热电学会理事,美国陶瓷学会会士、IEEE(电气与电子工程师协会)国际铁电委员会委员与研讨会主席(Symposium Chair)。


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