INFLUENCE OF EUROPIUM ADDITION ON MICROSTRUCTURE AND ELECTRICAL PROPERTIES OF CCTO CERAMICS
CaCu3Ti4Oi2 (CCTO) ceramics with different proportions of Eu2O3 dopant (mol％, x=0.00, 0.40 ％, 0.80 ％, 0.12 ％, 0.18 ％) were prepared by solid state conventional technique. SEM and XRD were used in the microstructural studies of the specimens; at the same time, the electrical properties and V-l characteristics of the varistor ceramics samples were investigated for varistors. Electric properties of the material were related to the internal grain which was invariable with Eu2C>3 concentration altered. Rich copper disappeared in internal boundary of the Eu-doped CCTO samples. The highest density is acquired at 1060 C, with the maximum value reaching to 95 ％. The maximum nonlinear coefficient reaches to 4.1 with the Eu2O3 dopant content up to 1.8 mol％. The results from the measurements showed that the dielectric constant and dielectric loss of the samples varied according to the proportion of Eu2O3 dopant and sintering temperature.
CaCu3Ti4Oi2 Rare earth Dielectric properties Varistor Microstructure
YanZHAO Dongmei Tang SongBAI YuanlingLiu DongXU
School of Material Science and Engineering, Jiangsu University, Zhenjiang 212013 School of Material Science and Engineering, Jiangsu University, Zhenjiang 212013 State Key Laborator
国际会议
深圳
英文
274-278
2011-12-09（万方平台首次上网日期，不代表论文的发表时间）