Conduction properties of CaCu3Ti4O12

Author

Li, S.T. ; Yang, Y.

Author_Institution

State Key Lab. of Electr. Insulation & Power Equip., Xian Jiaotong Univ., Xianning

fYear

2008

fDate

7-11 Sept. 2008

Firstpage

388

Lastpage

391

Abstract

CaCu₃Ti₄O₁₂ were prepared using conventional solid state reaction processing techniques. The structure of CaCu₃Ti₄O₁₂ was confirmed by X-ray diffraction. The microstructure with various grain sizes was characterized by scanning electron microscopy. Different element distributing between grain and grain boundary was detected by energy dispersive X-ray spectrometer. The dielectric spectrum was measured at room temperature. The I-V characteristics of CaCu₃Ti₄O₁₂ were measured in a wide temperature range from 93 K to 373 K. It is found that the nonlinear coefficient varies with temperature and the total conductance can be separated into three parts at various current. The nonlinear coefficient corresponding to each part can be deduced from the conductance-current curve, and then the temperature dependence of the nonlinear coefficient can be explained.

Keywords

X-ray diffraction; X-ray spectroscopy; calcium compounds; ceramics; electrical conductivity; grain boundaries; permittivity; scanning electron microscopy; CaCu₃Ti₄O₁₂; X-ray diffraction; conductance-current curve; conduction property; dielectric spectrum; energy dispersive X-ray spectrometer; grain boundary; grain size; room temperature; scanning electron microscopy; solid state reaction processing; Dielectric measurements; Grain boundaries; Grain size; Microstructure; Scanning electron microscopy; Solid state circuits; Temperature distribution; Temperature measurement; X-ray detection; X-ray diffraction;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulating Materials, 2008. (ISEIM 2008). International Symposium on

Conference_Location

Mie

Print_ISBN

978-4-88686-005-7

Electronic_ISBN

978-4-88686-006-4

Type

conf

DOI

10.1109/ISEIM.2008.4664595

Filename

4664595