四方晶系
材料科学
压电
陶瓷
铁电性
结晶学
分析化学(期刊)
相变
相(物质)
衍射
X射线晶体学
拉伤
晶体结构
电介质
矿物学
钙钛矿(结构)
复合材料
凝聚态物理
化学
光学
物理
光电子学
内科学
有机化学
医学
色谱法
作者
E. Chandrakala,J. Paul Praveen,Ajeet Kumar,A. R. James,Dibakar Das
摘要
A strain‐induced structural phase transition and its subsequent effect on the piezoelectric properties of BZT ‐ BCT – x CeO 2 ( x = 0–0.1 wt%) ceramics have been reported in this manuscript. BZT ‐ BCT – x wt% CeO 2 lead‐free piezoceramics were successfully been prepared using sol–gel method. X‐ray diffraction spectra of BZT ‐ BCT – x wt% CeO 2 ( x = 0–0.10 wt%) ceramics showed a purely single‐phase perovskite structure and a change in crystal structure between tetragonal and rhombohedral phases with increasing CeO 2 content. The strain‐induced structural phase transition has resulted in excellent piezoelectric properties, d 33 = 673 pC /N, k p ~ 56%, and T c = 110°C for BZT ‐ BCT –0.08 wt% CeO 2 ceramics. Greatly improved temperature stability of the piezoelectric properties has been observed over a temperature range between 20°C and 90°C. The ferroelectric–paraelectric transition temperature, T c obtained in this study is 17°C higher than those reported earlier.
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