Microstructure, density, and dielectric properties of lead-free (K0.44Na0.52Li0.04)(Nb0.96-xTaxSb0.04)O3 piezoelectric ceramics

被引：65

作者：

Chang, Yunfei ^{[1
]}

Yang, Zupei ^{[1
]}

Wei, Lingling ^{[1
]}

机构：

[1] Shaanxi Normal Univ, Sch Chem & Mat Sci, Key Lab Macromol Sci Shaanxi Province, Xian 710062, Peoples R China

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2007年 / 90卷 / 05期

关键词：

Density (specific gravity) - Dielectric properties - Electromechanical devices - Lead - Microstructure - Niobium compounds - Potassium compounds - Sintering;

D O I：

10.1111/j.1551-2916.2007.01631.x

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 (K0.44Na0.52Li0.04) (Nb0.96-xTaxSb0.04)O-3 piezoelectric ceramics were prepared by the conventional solid-state sintering method. The grain growth of the ceramics was inhibited and the relative density was improved with Ta substituting for Nb. Increasing x led to different variations of dielectric properties before and after poling, and prevented the occurrence of orthorhombic-tetragonal phase transition (at To-t). All the ceramics show an intermediate relaxor-like behavior between normal and ideal relaxor ferroelectrics. Significantly enhanced dielectric and piezoelectric properties were obtained in the ceramics with x = 0.20. The ceramics are very promising lead-free materials for electromechanical device applications.

引用

页码：1656 / 1658

页数：3

共 12 条

[1]

AHN ZS, 1987, J AM CERAM SOC, V70, pC18

[2]

COBLE RL, 1985, J APPL PHYS, V56, P131

[3] Dielectric and piezoelectric properties of lead-free (Na0.5K0.5)NbO3-SrTiO3 ceramics [J].