Phase transitions and electrical properties of (Na0.5K0.5)NbO3-Bi(Sc0.5Fe0.5)O3 lead-free piezoelectric ceramics

被引：0

作者：

Ding, Ailing ^{[2
]}

Wang, Hongfu ^{[1
]}

机构：

[1] Wuhan Univ Technol, Sch Mat Sci & Engn, Wuhan 430070, Peoples R China

[2] N Univ China, Sch Mech Engn & Automat, Taiyuan 030051, Shanxi, Peoples R China

来源：

JOURNAL OF CERAMIC PROCESSING RESEARCH | 2010年 / 11卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Piezoelectric materials; Electrical Properties; Ferroelectrics; Ceramics; CRYSTAL;

D O I：

暂无

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Lead-free ceramics (1-x)(Na0.5K0.5)NbO3-xBi(Sc0.5Fe0.5)O-3 (KNN-BSF, x = 0-0.08) were synthesized by conventional solid-state sintering. A morphotropic phase boundary (MPB) is formed in the ceramics near x = 0.01-0.02 at room temperature by X-ray analysis. Dielectric temperature spectra indicate the existence of two dielectric anomalous peal's, which correspond to orthorhombic-tetragonal (T-OT) and tetragonal-cubic (T-C) transitions. The cerarnic with x = 0.0125 near the MPB exhibits the following optinial electrical properties: P-r = 33.9 mu C/cm(2), E-c = 18.1 kV/cm, d(33) = 255 pC/N, k(p) = 0.44, and T-c = 372 degrees C.

引用

页码：44 / 46

页数：3

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