Faculty
Location:Faculty&Staff > Faculty
LI Longtu

Professor

Member of Chinese Academy of Engineering

Mailing Address:School of Materials Science & Engineering, Tsinghua University, Beijing 100084, P. R. China

Phone:8610-62784326(H); 8610-62772849(O)

Fax:8610-62792115(H); 8610-62772849(O)

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


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Research Field

Graduate Lecture Course: “Fundamental and Applications of Functional Ceramics Materials”

Intrests in functional ceramic materials including:

   High performance multilayer chip devices (MLCC, MLCI, ...) and related materials

   Piezoelectric ceramic actuators and ultrasonic motors

   Multilayer piezoelectric devices and their applications

   Low-temperature sintering piezoelectric ceramics with high performance

   Multiphase and multilayer composite functional ceramics

   Mechanism of aging and fatigue of ferroelectric and piezoelectric ceramics

   Microwave dielectric ceramic materials

   Fabrication and structure-properties of functional nano-powders and nano-crystal ceramics

   Fabrication of functional ceramic think and thin film, multi-functional membranes

   New functional ceramic materials, devices and their applications


Awards And Honors

Prof. Li got many awards including two 2nd class and one 3rd class award of National Invention Prizes, three 1st class and five 2nd class awards of Science and Technology progress prize conferring by the related ministries and province.

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1985 National Awards of Science and Technology for Tackling Key Problems. (By National Sci. & Tech. Commission, Ministry of Finance et al.)

1986 2nd class Award of Science and Technology Progress (By Ministry of Electronics)

1987 2nd class Award of Science and Technology Progress By National Educatioin Commission)

1987 2nd class Award of Science and Technology Progress (By Ministry of Electronics)

1987 3rd class Award of National Invention Prize By National Sci. & Tech. Commission)

1991 1st class Award of Science and Technology Progress (By National Aviation Industry Cooperation)

1995 2nd class Award of Science and Technology Progress (By National Educatioin Commission)

1996 1st class Award of Science and Technology Progress (By National Educatioin Commission)

1996 2rd class Award of National Invention Prize (By National Sci. & Tech. Commission)

1996 1st class Award of National High-tech Developing Prize (By National Sci. & Tech. Commission et al.)

1998 2nd class Award of Science and Technology Progress (By Ministry of Electronics)

1998 Yilida Science and Technology Prize

2003 Nominated Award of Science and Technology (1st class Technology Inovation) (By Ministry of Education)

2005 2rd class Award of National Invention Prize (By Ministry of Sci. & Tech.)


Academic Achievements

Selected Publications

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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