Title :
Conduction properties of CaCu3Ti4O12
Author :
Li, S.T. ; Yang, Y.
Author_Institution :
State Key Lab. of Electr. Insulation & Power Equip., Xian Jiaotong Univ., Xianning
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;
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
DOI :
10.1109/ISEIM.2008.4664595
