Effects of Na Excess on the Preparation and Characterization of (K0.5Na0.5)NbO3 Ceramics

被引：2
|
作者：
Tian, Aifen [1 ]
Li, Ce [1 ]
Fan, Jinyu [1 ]
Li, Lei [1 ]
Xu, Zhipeng [1 ]
Du, Huiling [1 ]
机构：
[1] Xian Univ Sci & Technol, Sch Mat Sci & Engn, Xian, Shaanxi, Peoples R China
来源：
FERROELECTRICS | 2016年 / 491卷 / 01期
关键词：
Lead free ceramics; potassium sodium niobate; sodium excess; electrical properties; PIEZOELECTRIC PROPERTIES; ELECTRICAL-PROPERTIES; BEHAVIOR; PHASE;
D O I：
10.1080/00150193.2015.1072008
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Lead free ceramics (K-0.5 Na0.5+x)NbO3 (0 <= x <= 0.3, KNN-x) were prepared by a novel method mixing perovskite structure of NaNbO3 and KNbO3 powders. Effects of Na excess and sintering temperatures on phase structure, microstructure and electrical properties of KNN ceramics were investigated. Result showed that the single phase perovskite structure was obtained in the KNN-0.1 ceramic sintered at 1070 degrees C, which also showed optimized ferroelectric property with P-r = 7.16 mC/cm(2) and E-c = 7.95 kV/cm. The KNN-x ceramic with x = 0.2 showed optimized piezoelectric property with d(33) = 116 pC/N because of the homogeneous dense microstructure.
引用
收藏
页码：87 / 94
页数：8
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