Authors: Juanjuan Wang Lajun Feng Ali Lei Kang Zhao Aijun Yan
Publish Date: 2014/06/06
Volume: 23, Issue: 9, Pages: 3133-3140
Abstract
Li2CO3 MgCO3 BaCO3 and Bi2O3 dopants were introduced into CaCu3Ti4O12 CCTO ceramics in order to improve the dielectric properties The CCTO ceramics were prepared by conventional solidstate reaction method The phase structure microstructure and dielectric behavior were carefully investigated The pure structure without any impurity phases can be confirmed by the xray diffraction patterns Scanning Electron Microscopy SEM analysis illuminated that the grains of Ca090Li020Cu3Ti4O12 ceramics were greater than that of pure CCTO It was important for the properties of the CCTO ceramics to study the additives in complex impedance spectroscopy It was found that the Ca090Li020Cu3Ti4O12 ceramics had the higher permittivity 45000 the lower dielectric loss 0025 than those of CCTO at 1 kHz at room temperature and good temperature stability from −30 to 75 °C
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