兩院院士
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李龍土
教授

中國工程院院士
電話:62772849
傳真:68772849
電子郵箱:llt-dms@mail.tsinghua.edu.cn
辦公地址:辦公室:逸夫技術科學樓B317
清華大學材料科學與工程系教授,博士生導師,中國工程院院士。1935年生,福建南安人。1958年畢業于清華大學。曾任國防科工委軍用新材料應用研究專家組成員,國家"863"計劃新材料領域先進功能陶瓷專題組長。第四屆國家自然科學獎評審委員,現任新型陶瓷與精細工藝國家重點實驗室學術委員會主任,中國矽酸鹽學會理事,中國材料研究學會理事,《功能材料》雜志編委,IEEE高級會員。長期從事功能陶瓷領域的教學與研究工作。
主要研究領域為鐵電、壓電、介電和半導體陶瓷材料及應用。曾主持"863"計劃"高性低能燒多層陶瓷電容器"重大項目,對發展高技術産業作出重大貢獻。在獨石壓電變壓器、弛豫鐵電陶瓷、高性能壓電陶瓷、複合特性熱敏電阻、鐵電壓電材料與器件的疲勞機制以及壓電超聲馬達等方面進行開創性研究。曾獲國家技術發明二等獎、三等獎,教委科技進步一等獎、二等獎,中國航空工業總公司科技進步一等獎,電子工業部科技進步二等獎等獎勵。獲授權專利19項,發表論文二百餘篇。

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1958年 清華大學土木工程系畢業

1958-1970 清華大學土木系建材教研組任助教,講師

1970-1983 清華大學化工系無機非金屬材料教研組任講師,副教授

1983-1988 清華大學化工系,任副教授,教授

1988-至今 beat365教授

1997年 當選為 中國工程院院士


鐵電、壓電、介電、鐵磁及半導體等功能陶瓷材料及應用研究。


主要研究課題: 


·高性能片式電子元件及材料

·壓電陶瓷驅動器及超聲馬達

·多層複合壓電陶瓷變壓器及應用研究

·高性能低溫燒結壓電陶瓷材料組成與制備

·多層多相複合功能陶瓷共燒行為與界面

·複合特性熱敏陶瓷

·片式電子元件電鍍性能劣化與失效機理

·鐵電、壓電陶瓷材料疲勞、老化與偏壓特性及機理

·微波介質陶瓷材料

·新型功能陶瓷材料與器件應用


研究方向 : 新型陶瓷與精細工藝國家重點實驗室的鐵電、壓電功能陶瓷方向。


1.H. Wen, X.H. Wang, C.F. Zhong, L.K. Shu, and L.T. Li, Epitaxial growth of sol-gel derived BiScO3-PbTiO3 thin film on Nb-doped SrTiO3 single crystal substrate, Appl. Phys. Lett. 90 (2007) 202902.

2.H. Wen, X.H. Wang, X.Y. Deng, T.Y. Sun, and L.T. Li, Effect of crystallization process on the ferroelectric properties of sol-gel derived BiScO3-PbTiO3 thin films, J. Appl. Phys. 101 (2007) 016103.

3.F. Zhao, Z.X. Yue, J. Pei, Z.L. Gui, and L.T. Li, Effects of octahedral thickness variance on the temperature coefficient of resonant frequency of the B-site deficient hexagonal perovskites, Appl. Phys. Lett. 90 (2007) 142908.

4.F. Zhao, Z.X. Yue, J. Pei, H. Zhuang, Z.L. Gui, and L.T. Li, Improvement on the temperature coefficient of resonant frequency of hexagonal perovskites through intergrowth structures, Appl. Phys. Lett. 89 (2006) 202901.

5.X.H. Wang, X.Y. Deng, H. Wen, and L.T. Li,Phase transition and high dielectric constant of bulk dense nanograin barium titanate ceramics, Appl. Phys. Lett. 89 (2006) 162902.

6.X.Y. Deng, X.H. Wang, L.L. Chen, H. Wen, and L.T. Li, Observation of ferroelectric domain patterns in nanocrystalline BaTiO3 ceramics, Appl. Phys. Lett. 89 (2006) 152901.

7.X.Y. Deng, X.H. Wang, H. Wen, L.L. Chen, L. Chen, and L.T. Li, Ferroelectric properties of nanocrystalline barium titanate ceramics, Appl. Phys. Lett. 88 (2006) 252905.

8.H. Wen, X.H. Wang, X.Y. Deng, and L.T. Li, Characterization of (100)-oriented BiScO3-PbTiO3 thin films synthesized by a modified sol-gel method, Appl. Phys. Lett. 88 (2006) 222904.

9.F. Zhao, Z.X. Yue, Z.L. Gui, and L.T. Li, Preparation, characterization and microwave dielectric properties of A2BWO6 (A = Sr, Ba; B=Co, Ni, Zn) double perovskite ceramics, Jpn. J. Appl. Phys. Part 1 - Regul. Pap. Brief Commun. Rev. Pap. 44 (2005) 8066-8070.

10.B. Li, J. Zhou, L.T. Li et al., Temperature-tuned photonic bandgap in polymer synthetic opals, J. Mater. Sci. 40 (2005) 2611-2613.

11.D. Guo, L.T. Li, K. Cai et al., Rapid prototyping of piezoelectric ceramics via selective laser sintering and gelcasting, J. Am. Ceram. Soc. 87 (2004) 17-22.

12.L.T. Li, J.C. Zhao and Z.L. Gui, The thermal sensitivity and dielectric properties of SrTiO3-based ceramics, Ceram. Int. 30 (2004) 1073-1078.

13.B.R. Li, L.T Li, and X.H. Wang, Preparation and sintering behaviour of nanostructured SrBi2Ta2O9 ceramics, Br. Ceram. Trans. 102 (2003) 34-37.

14.J.L. Cao, Z.L. Gui, and L.T. Li, Effect of interactions at the cofired interface of electrode/ceramics on the reliability of lead-based multilayer ceramic capacitors, J. Electroceram. 10 (2003) 57-61.

15.C.S. Wang, L.T. Li, J. Zhou et al., Microstructures and high-frequency magnetic properties of low-temperature sintered Co-Ti substituted barium ferrites, J. Magn. Magn. Mater. 257 (2003) 100-106.

16.Y.C. Zhang, L.T. Li, Z.X. Yue et al., Effects of additives on microstructures and microwave dielectric properties of ZnNb2O6 ceramics, Mater. Sci. Eng. B-Solid State Mater. Adv. Technol. 99 (2003) 282-285.

17.X.B. Hu, L.T. Li, X.C. Chu et al., The resonance vibration properties of a bimorph flexural piezoelectric ultrasonic transducer for distance measurement, Mater. Sci. Eng. B-Solid State Mater. Adv. Technol. 99 (2003) 316-320.

18.D. Guo, L.T. Li, Z.L. Gui, Anti-crack machining of PZT ceramics for fabricating piezocomposites by using gelcasting technique, Mater. Sci. Eng. B-Solid State Mater. Adv. Technol. 99 (2003) 25-28.

19.H.G. Zhang, L.T. Li, Y.L. Wang et al., Dielectric Behavior of Co2Z Hexagonal Ferrites with Multiple Modifications, J. Appl. Phys. (2002) 91(8): 5230-5233.

20.R.Z. Zuo, L.T. Li, Z.L. Gui et al., Effects of additives on the interfacial microstructure of cofired electrode-ceramic multilayer systems, J. Am. Ceram. Soc. 85 (2002) 787-793.

21.N.X. Zhang, L.T. Li, B.R. Li, et al., Improvement of electric fatigue properties in PLZT ferroelectric ceramics due to SrBi2Ta2O9 incorporation, Mater. Sci. Eng. B-Solid State Mater. Adv. Technol. 90 (2002) 185-190.

22.Y.L. Wang, L.T. Li, J.Q. Qi et al., Ferroelectric characteristics of ytterbium-doped barium zirconium titanate ceramics, Ceram. Int. 28 (2002) 657-661.

23.J.C. Zhao, L.T. Li, and Z.L. Gui, A study on the properties of (Y, Mn) co-doped Sr0.5Pb0.5TiO3 thermistors, Mater. Sci. Eng. B-Solid State Mater. Adv. Technol. 94 (2002) 202-206.

24.L.T. Li, Z.L. Gui, Fabrication of low Firing Piezoelectric Ceramics and Their Applications, Ferroelectrics 262 (2001) 3-10.

25.J.L. Cao, L.T. Li, and Z.L. Gui, An XPS study on the degradation of lead magnesium niobate-based relaxor ferroelectrics during nickel electroplating, J. Mater. Chem. 11 (2001) 1198-1200.

26.H.G. Zhang, L.T. Li, J. Zhou et al., Low-temperature sintering, densification, and properties of Z-type hexaferrite with Bi2O3 additives, J. Am. Ceram. Soc. 84 (2001) 2889-2894.

27.J.C. Zhao, L.T. Li, and Z.L. Gui, Influence of lithium modification on the properties of Y-doped Sr0.5Pb0.5TiO3 thermistors, Sens.Actuator A-Phys. 95 (2001) 46-50.

28.N.X. Zhang, L.T. Li, and Z.L. Gui, Improvement of electric fatigue in PLZT ferroelectric capacitors due to zirconia incorporation, Mater. Chem. Phys. 72 (2001) 5-10.

29.L.T. Li, R.Z. Zuo, Z.L. Gui, Interface Cofiring behavior of Multilayer devices between ferroelectric and Ag/PdElectrode, Ferroelectrics, 263 (1-4) (2001) 1555-1560.

30.L.J. Ruan, L.T. Li, and Z.L. Gui, X7R type lead complex perovskite ferroelectric ceramics with high dielectric constant, J. Mater. Res. 13 (1998) 253-256.

31.R.Z. Zuo, L.T. Li, R.Z. Chen et al., Sintering characteristics and dielectric properties of silver-doped PMN-PZN-PT relaxor ferroelectric ceramics, J. Mater. Sci. 35 (2000) 5433-5436.

32.L.T. Li, W.P. Chen, Z.L. Gui, A New Mechanism for the Influence of Electroplating and Electroless Plating on ferroelectric Components, Ferroelectrics (1999) 231: 209-210.

33.Z.L. Gui, L.T. Li, S.H. Gao et al., Low-Temperature Sintering of lead-Based Piezoelectric Ceramics, J. Am. Ceram. Soc. (1989) 72(3): 486-491.

34.W.P. Chen, L.T. Li, J.Q. Qi et al., Influence of electroless nickel plating on multilayer ceramic capacitors and the implications for reliability in multilayer ceramic capacitors, J. Am. Ceram. Soc. 81 (1998) 2751-2752.

35.L.J. Ruan, L.T. Li, and Z.L. Gui, Temperature stable dielectric properties for Pb(Mg1/3Nb2/3)O3-BaTiO3-PbTiO3 system ceramics, J. Mater. Sci. Lett. 16 (1997) 1020-1022.

36.L.T. Li, S. Wan, S.P. Zhou et. al., Study on V-type PTC Ceramics,J. Mater. Res. (1994) 1: 145-152.

37.L.T. Li, S.X. Dong, Zhilun Gui, Study on Characteristics of Standing Wave Motor, In Proc. of ISAF-94, pp.713-716.

38.L.T. Li, W.T. Deng, J.H. Chai et. al., Lead Zirconate Titanate Ceramics and Monolithic Piezoelectric Transformer of Low Firing Temperature, Ferroelectrics (1990) 101: 193-200.

39.Y.Wang, Z.L.Gui, L.T. Li et.al., Dielectric-Constant versu Aging time for the Doped PMN-PZN-PT Ferroelectric Relaxor Ceramic of Z5U MLCs, J. Mater. Sci. Lett. 14(10) (1995) 695-696.

40.D.J. Wang, Z.L. Gui, L.T.Li, Preparation and Electrical Properties of Semiconducting Strontium-Lead Titanate PTCR Ceramics, J. Mater. Sci. Lett. 8(4) (1997) 271-276.


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