Investigation of enhanced performance in BF-xPT-0.05BZ ternary ceramics for high temperature applications
Investigation of enhanced performance in BF-xPT-0.05BZ ternary ceramics for high temperature applications
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研究用于高温应用的 BF-xPT-0.05BZ 三元陶瓷的增强性能
DOI：
10.1016/j.ceramint.2019.03.154
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发表时间：
2019
影响因子：
5.2
通讯作者：
Chen Jianguo
中科院分区：
文献类型：
--
作者：
Jian Jie;Peng Rui;Luo Feng;Cheng Jinrong;Chen Jianguo
采用固相法合成了（0.95-x）BiFeO3-xPbTiO3-0.05BaZrO3（BF-xPT-0.05BZ）三元陶瓷，其结构为钙钛矿结构，无第二相。BF-0.32PT-0.05BZ陶瓷以菱形面体结构为主，含有少量的四方相，表现出嗜形相边界（morphotropic phase boundary， MPB）特征。不同PT含量的致密陶瓷的平均晶粒尺寸为8 ~ 15 μm。BF-xPT-0.05BZ陶瓷的铁电-准电相变表现为一阶相变特征，发生在550 ℃左右。值得注意的是，BF-0.32PT-0.05BZ陶瓷在175 kV/cm的电场下表现出60 μC/cm2的巨大残余极化。此外，BF-0.32PT-0.05BZ陶瓷的最高压电常数d33为105 pC/N， qmof为501。BF-xPT-0.05BZ陶瓷的退极化温度非常接近其居里温度，证明了高温压电陶瓷的广泛应用前景。
(0.95-x)BiFeO3-xPbTiO3-0.05BaZrO3(BF-xPT-0.05BZ) ternary ceramics were synthesized by the solid-state reaction method, which present a perovskite structure without detectable second phase. BF-0.32PT-0.05BZ ceramics display the dominant rhombohedral structure with a small amount of tetragonal phase, revealing the characteristics of morphotropic phase boundary (MPB). The well-densified ceramics possess the average grain size of 8–15 μm with different PT contents. The ferroelectric-paraelectric phase transition of BF-xPT-0.05BZ ceramics shows the characteristic of the first-order transition, which occurs at around 550 °C. It is noticeable that BF-0.32PT-0.05BZ ceramics exhibit the giant remnant polarization of 60 μC/cm2under the field of 175 kV/cm. Moreover, BF-0.32PT-0.05BZ ceramics show the highest piezoelectric constantd33of 105 pC/N andQmof 501. The depolarization temperatures of BF-xPT-0.05BZ ceramics are much close to their Curie temperatureTC, proving the extensive prospect for high temperature piezoelectric applications.