Enhanced dielectric and piezoelectric properties in BaZrO3 modified BiFeO3-PbTiO3 high temperature ceramics
Enhanced dielectric and piezoelectric properties in BaZrO3 modified BiFeO3-PbTiO3 high temperature ceramics
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BaZrO3 改性 BiFeO3-PbTiO3 高温陶瓷增强介电和压电性能
DOI：
10.1007/s10854-016-4671-6
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发表时间：
2016-07-01
影响因子：
2.8
通讯作者：
Chen, Jianguo
中科院分区：
文献类型：
--
作者：
Li, Qiang;Dong, Yingjie;Chen, Jianguo
采用常规固相反应方法制备了(0.67-x)BiFeO3-0.33PbTiO(3)-xBaZrO(3)(BF-PT-BZ)陶瓷。 X射线衍射分析表明，随着BZ含量的增加，发生了从四方晶系(T)到菱形晶系(R)的相变，并且在0.08至0.12的组成范围附近观察到两相共存。 BZ的引入降低了c/a比，减小了晶粒尺寸，并明显改善了介电和压电性能。 x = 0.08 的 BF-PT-BZ 固溶体既具有高居里温度，又具有良好的电性能。居里温度T(℃)、介电常数ε(r)、介电损耗tanδ、压电常数d(33)、机电耦合系数k(p)分别为540A℃、640、0.02、117pC/N、0.34。去极化温度T(d)为470 A°C，比商业化PZT陶瓷高约320 A°C，表现出更好的电热稳定性。
(0.67-x)BiFeO3-0.33PbTiO(3)-xBaZrO(3) (BF-PT-BZ) ceramics were prepared by conventional solid state reaction method. X-ray diffraction analysis indicated that a phase transformation from tetragonal (T) to rhombohedral (R) took place with increasing the BZ content, and the coexistence of two phases were observed near the composition range from 0.08 to 0.12. Introduction of BZ reduced the c/a ratio, decreased the grain size, and improved the dielectric as well as piezoelectric properties obviously. Both high Curie temperature and good electrical properties were obtained in the BF-PT-BZ solid solutions with x = 0.08. The Curie temperature T (C), dielectric constant epsilon (r), dielectric loss tan delta, piezoelectric constant d (33), electromechanical coupling factor k (p) were 540 A degrees C, 640, 0.02, 117 pC/N, 0.34, respectively. The depolarization temperature T (d) was 470 A degrees C, about 320 A degrees C higher than that of commercialized PZT ceramics, showing better electrical thermal stability.