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The influence of electrical field on (K,Na)NbO3-based ceramics over polymorphic phase transition composition region

文献类型： 外文期刊

作者： Zhao, Yongjie 1 ; Liu, Jialin 1 ; Yan, Dong 2 ; Zhou, Heping 3 ; Zhang, Xiaowen 3 ;

作者机构： 1.Beijing Inst Technol, Beijing Key Lab Construct Tailorable Adv Funct Ma, Sch Mat Sci & Engn, Beijing 100081, Peoples R China

2.Beijing Acad Agr & Forestry Sci, Inst Plant & Environm Protect, Beijing 100097, Peoples R China

3.Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China

关键词： Variation of TO-T; Enhancement of piezoelectricity d(33); Remnant polarization P-r; Thermodynamic equilibrium

期刊名称：CERAMICS INTERNATIONAL （ 影响因子：4.527； 五年影响因子：4.049 ）

ISSN： 0272-8842

年卷期： 2019 年 45 卷 16 期

页码：

收录情况： SCI

摘要： By investigating the responding behavior of Li modified (K,Na)NbO3 ceramics under external electrical field, a coincidence phenomenon had been observed. It was found that the amplitude of piezoelectricity enhancement for these ceramics with pure orthorhombic, coexistence and tetragonal phase were consistent with the variation amplitude for the transition temperature from orthorhombic to tetragonal (TO-T). The interpretation of the remnant polarization (P-r) had rationally demonstrated the enhancement of piezoelectricity for these three kinds of ceramics. The residual polarization energy induced by remnant polarization (P-r) was about to affect the thermodynamic equilibrium state of these ceramics and accordingly Delta TO-T. varied with these poled ceramics.

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