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李龙土

        清华大学材料科学与工程系教授,博士生导师,中国工程院院士。1935年生,福建南安人。1958年毕业于清华大学。曾任国防科工委军用新材料应用研究专家组成员,国家"863"计划新材料领域先进功能陶瓷专题组长。第四届国家自然科学奖评审委员,现任新型陶瓷与精细工艺国家重点实验室学术委员会主任,中国硅酸盐学会理事,中国材料研究学会理事,《功能材料》杂志编委,IEEE高级会员。长期从事功能陶瓷领域的教学与研究工作。
  主要研究领域为铁电、压电、介电和半导体陶瓷材料及应用。曾主持"863"计划"高性低能烧多层陶瓷电容器"重大项目,对发展高技术产业作出重大贡献。在独石压电变压器、弛豫铁电陶瓷、高性能压电陶瓷、复合特性热敏电阻、铁电压电材料与器件的疲劳机制以及压电超声马达等方面进行开创性研究。曾获国家技术发明二等奖、三等奖,教委科技进步一等奖、二等奖,中国航空工业总公司科技进步一等奖,电子工业部科技进步二等奖等奖励。获授权专利19项,发表论文二百余篇。

【联系方式】

办公室:逸夫技术科学楼B317

联系电话:62772849

传真:(8610)-68772849

E-mail:llt-dms@mail.tsinghua.edu.cn

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1958年 清华大学土木工程系毕业

1958-1970 清华大学土木系建材教研组任助教,讲师

1970-1983 清华大学化工系无机非金属材料教研组任讲师,副教授

1983-1988 清华大学化工系,任副教授,教授

1988-至今 大阳城集团官方网站教授

1997年 当选为 中国工程院院士

铁电、压电、介电、铁磁及半导体等功能陶瓷材料及应用研究。

主要研究课题: 科学研究

·高性能片式电子元件及材料

·压电陶瓷驱动器及超声马达

·多层复合压电陶瓷变压器及应用研究

·高性能低温烧结压电陶瓷材料组成与制备

·多层多相复合功能陶瓷共烧行为与界面

·复合特性热敏陶瓷

·片式电子元件电镀性能劣化与失效机理

·铁电、压电陶瓷材料疲劳、老化与偏压特性及机理

·微波介质陶瓷材料

·新型功能陶瓷材料与器件应用

研究方向 : 新型陶瓷与精细工艺国家重点实验室的铁电、压电功能陶瓷方向。

【论文与专利】

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.

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.

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.

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.

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.

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.

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.

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.

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.

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

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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

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

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.

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.

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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