Defect State in Grain Boundary of Ba0.92Ca0.08Ti1.02O3 Ceramics with Low Room Temperature Resistivity

Journal of Inorganic Materials

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Defect State in Grain Boundary of Ba_0.92Ca_0.08Ti_1.02O₃ Ceramics with Low Room Temperature Resistivity

CAO Ming-He¹; YUAN Jun¹; ZHOU Dong-Xiang²; GONG Shu-Ping²

1.Department of Materials Science and Engineering; Tsinghua University; Beijing 100084; China; 2.Department of electrical Science and Technology; Huazhong University of Science and Technology; Wuhan 430074; China

Received:2002-10-08 Revised:2002-11-26 Published:2003-11-20 Online:2003-11-20

Abstract

Abstract: The distribution of elements on the grain boundaries of Ba_0.92Ca_0.08Ti_1.02O₃ ceramics with low room temperature resistivity was studied by TEM combined with EDS. The point defects in the grain boundaries were also analyzed. The results show that the point defects in the grain boudaries of Ba_0.92Ca_0.08Ti_1.02O₃ ceramics with low room temperature resistivity mainly include Mn"_Ti, Mn'_Ti or Al'_Ti, and V"_Ba.

Key words: low room temperature resistivity, PTCR ceramics, grain boundary, defect structure

CLC Number:

TQ174

CAO Ming-He,YUAN Jun,ZHOU Dong-Xiang,GONG Shu-Ping. Defect State in Grain Boundary of Ba_0.92Ca_0.08Ti_1.02O₃ Ceramics with Low Room Temperature Resistivity[J]. Journal of Inorganic Materials.

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Defect State in Grain Boundary of Ba_0.92Ca_0.08Ti_1.02O₃ Ceramics with Low Room Temperature Resistivity

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