Premium
Dielectric and Varistor Behavior of CaCu 3 Ti 4 O 12 –MgTiO 3 Composite Ceramics
Author(s) -
Yuan Jiancong,
Lin YuanHua,
Lu Huafei,
Cheng Bo,
Nan CeWen
Publication year - 2011
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2011.04533.x
Subject(s) - varistor , materials science , composite number , dielectric , microstructure , composite material , permittivity , ceramic , dielectric spectroscopy , dielectric loss , grain size , relative permittivity , electrical impedance , analytical chemistry (journal) , voltage , electrical engineering , electrode , chemistry , optoelectronics , chromatography , electrochemistry , engineering
The dielectric and varistor properties of MgTiO 3 –CaCu 3 Ti 4 O 12 composite were investigated in term of a new composite with high dielectric permittivity and breakdown voltage. The MgTiO 3 –CaCu 3 Ti 4 O 12 composite ceramics were prepared by a traditional solid‐state method. Analysis of microstructure indicated that MgTiO 3 addition can refine the grain size. Impedance spectroscopy results showed that the dielectric constant and loss of the composites were stable with the frequency and temperature. The activation energy calculated by the variation of electrical modulus was almost same (0.12 eV) as previously reported one. Especially, the breakdown voltage of the composite ceramics can by adjusted from 200 to 1200 V/mm by controlling the ratio of the amount of CCTO and MgTiO 3 composites.