Enhanced ferroelectric and piezoelectric properties of BiFeO3-BaTiO3 lead-free ceramics by simultaneous optimization of Bi compensation and sintering conditions

被引：50

作者：

Yang, Li ^{[1
]}

Chen, Chao ^{[1
]}

Jiang, Xiangping ^{[1
]}

Huang, Xiaokun ^{[1
]}

Nie, Xin ^{[1
]}

Chang, Saisai ^{[1
]}

机构：

[1] Jingdezhen Ceram Inst, Adv Ceram Mat Res Inst, Sch Mat Sci & Engn, Jiangxi Key Lab Adv Ceram Mat, Jingdezhen 333403, Jiangxi, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2022年 / 48卷 / 09期

基金：

中国国家自然科学基金;

关键词：

BiFeO3-BaTiO3; Quenching process; Sintering conditions; Oxygen vacancies; HIGH-TEMPERATURE SENSITIVITY; ELECTRICAL-PROPERTIES; PHASE; ORIGIN; EXCESS;

D O I：

10.1016/j.ceramint.2022.01.158

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 piezoelectric ceramics 0.7Bi(1+x)FeO(3)-0.3BaTiO(3) (B1+xF-BT, 0 <= x <= 0.04) with excellent piezoelectric performance were synthesized with conventional sintering methods. The impacts of Bi compensation and sintering conditions on the structure and electrical properties of the piezoelectric ceramics were studied. The results showed that the samples (x <= 0.02) exhibited pure perovskite structures, and a Bi25FeO40 impurity phase appeared in the samples (x >= 0.03). Appropriate compensation with Bi had an important effect on microstructures and electrical properties. Optimal piezoelectric and ferroelectric properties and the highest relative density were achieved with the x = 0.02 sample. In addition, various dwell times (t(s)) were used during quenching for the sample with x = 0.02. Excellent piezoelectric and ferroelectric properties (d(33) = 192 pC/N, P-r = 41.71 mu C/cm(2), T-c = 493 degrees C) were achieved with the sample at t(s) = 3 hQ, which was ascribed to the decreased concentration of oxygen vacancies and enhanced lattice distortion. The present research on simultaneous optimization of Bi compensation and sintering conditions will provide guidelines for designing BF-BT ceramics used in several device applications.

引用

页码：12866 / 12874

页数：9

共 41 条

[1] Enhanced Electromechanical Properties of 0.65Bi1.05FeO3-0.35BaTiO3 Ceramics through Optimizing Sintering Conditions [J].