Effects of ball milling on microstructure and electrical properties of sol-gel derived (Bi0.5Na0.5)0.94Ba0.06TiO3 piezoelectric ceramics

被引：28

作者：

Wang, Hongqiang ^{[1
]}

Zuo, Ruzhong ^{[1
]}

Ji, Xun ^{[1
]}

Xu, Zhengkui ^{[2
]}

机构：

[1] Hefei Univ Technol, Sch Mat Sci & Engn, Inst Electro Ceram & Devices, Hefei 230009, Peoples R China

[2] City Univ Hong Kong, Dept Phys & Mat Sci, Hong Kong, Hong Kong, Peoples R China

来源：

MATERIALS & DESIGN | 2010年 / 31卷 / 09期

基金：

中国国家自然科学基金;

关键词：

SYSTEM;

D O I：

10.1016/j.matdes.2010.04.041

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A citrate sol-gel method was investigated for synthesizing lead-free piezoelectric compositions of (Bi0.5Na0.5)(0.94)Ba0.06TiO3 (BNT) and the effect of ball milling on the sintering, microstructure and electrical properties of BNT ceramics was emphasized. The thermal analysis and X-ray diffraction results show that crystalline powders with a single perovskite structure can be obtained when calcined at 600 degrees C for 3 h. The average particle size of as-calcined powder and electrical properties of sintered samples were obviously dependent on an additional ball milling. Because of well-dispersed superfine powders (similar to 100 nm), the BNT ceramics can be well densified at temperature 50 degrees C lower than that by mixed-oxide method and conventional sol-gel method and as a result exhibit enhanced electrical properties of a piezoelectric constant d(33) similar to 180 pC/N and a planar electromechanical coupling factor k(p) similar to 0.29. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：4403 / 4407

页数：5

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