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(K0.5Na0.5)NbO3 lead-free ceramics with improved piezoelectricity and field-induced strain

文献类型： 外文期刊

作者： Huang, Rongxia 1 ; Zhao, Yongjie 2 ; Yan, Dong 3 ;

作者机构： 1.Guangdong Univ Technol, Sch Electromech Engn, Guangzhou 510006, Guangdong, Peoples R China

2.Beijing Inst Technol, Sch Mat Sci & Engn, Beijing Key Lab Construct Tailorable Adv Funct Ma, Beijing 100081, Peoples R China

3.Beijing Acad Agr & Forestry Sci, Inst Plant & Environm Protect, Beijing 10009Z, Peoples R China

关键词： Sintering behavior; Ferroelectric property; Piezoelectric property; Strain property

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 1 期

页码：

收录情况： SCI

摘要： The sintering additive 0.4ZnO-0.6B(2)O(3) (abbreviated as ZnB) was proposed to improve the sintering behavior of (K,Na)NbO3 ceramics. The influence of ZnB on the microstructure and electrical properties of (K,Na)NbO3 ceramics was carefully investigated in detail. Results demonstrated that during the sintering process a liquid phase can form at a relative low temperature, which could favor and accelerate the densification of (K,Na)NbO3 ceramics. Moreover, it was found that (K,Na)NbO3 ceramics with 1.2 wt% ZnB exhibited excellent properties with the piezoelectric constant of d(33) = 134 pC/N and planar electromechanical coupling coefficient of k(p) = 40%. Moreover, the field induced strain of 0.135@5 kV/mm was also achieved with this composition. Meanwhile, the mechanism for this enhancement of property was discussed.

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