烧结
材料科学
陶瓷
电介质
晶界
压电
铁电性
固相反应路线
粒度
单斜晶系
复合材料
四方晶系
分析化学(期刊)
微观结构
矿物学
相(物质)
相界
晶体结构
结晶学
化学
光电子学
有机化学
色谱法
作者
Partha Narayan Mishra,. Sonia,P. Kumar
标识
DOI:10.1016/j.jallcom.2012.08.017
摘要
Lead free 0.5[Ba(Zr0.2Ti0.8)O3]-0.5[(Ba0.7Ca0.3)TiO3]/[BZT–BCT 50/50] ceramics were synthesized by conventional solid state reaction route. The effect of sintering temperature on structural and electrical properties of BZT–BCT 50/50 ceramics were studied in detail. The coexistence of tetragonal-monoclinic structures confirmed the MPB nature of BZT–BCT 50/50 ceramics. Grain size, density and dielectric constant at room temperature of BZT–BCT 50/50 ceramics increased with the increase of sintering temperature. Increase of Tc with sintering temperature confirmed the effect of relieving of internal stress by grain-boundary sliding. Increase of diffuse phase transition indicated that with the increase in sintering temperature the competition between Ti and Zr ions increased to occupy the same crystallographic site B, which leads to increase in composition fluctuations of different polar micro-regions. A max. strain as high as ∼0.36% has been obtained in BZT–BCT 50/50 ceramic samples sintered at 1300 °C.
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