Enhanced dielectric and piezoelectric performance of (1-x) Bi0.5(Na0.78K0.22)0.5TiO3-xBaTiO3 ceramics

被引：14

作者：

Kang, Wenshuo ^{[1
]}

Li, Yuanliang ^{[1
]}

Zheng, Zhanshen ^{[1
]}

Zhao, Rujie ^{[1
]}

机构：

[1] North China Univ Sci & Technol, Coll Mat Sci & Engn, Hebei Prov Key Lab Inorgan Nonmetall Mat, Key Lab Environm Funct Mat Tangshan City, Tangshan 063210, Hebei, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2020年 / 46卷 / 11期

基金：

中国国家自然科学基金;

关键词：

Doping modification; Solid solution modification; MPB; BNKT-BT ceramics; PHASE-TRANSITIONS; EVOLUTION;

D O I：

10.1016/j.ceramint.2020.04.128

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：

High-performance (1-x)Bi-0.5(Na0.78K0.22)(0.5)TiO3-xBaTiO(3) lead free ceramics were synthesized by traditional solid-state technology. Combined with K+ doping and BaTiO3 solid solution modification, morphotropic phase boundary was constructed and the electrical performance of NBT-based ceramics were significantly improved. The sample (x = 0.06) has maximum dielectric constant of 2054, minimum dielectric loss of 0.034, piezoelectric constant increased from 140pC/N to 184pC/N, and planar electromechanical coupling coefficient increased from 30% to 49%. The modified samples improve the depolarization temperature and the stability of piezoelectric constant at high temperature. The obtained electrical parameters are compared with the results in other references. Lattice theory and domain theory were used to explain the origin of excellent piezoelectric performance.

引用

页码：18089 / 18095

页数：7

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