Densification behavior, microstructure, and electrical properties of sol-gel-derived niobium-doped (Bi0.5Na0.5)0.94Ba0.06TiO3 ceramics

被引：19
|
作者：
Wang, Hongqiang [1 ]
Zuo, Ruzhong [1 ]
Liu, Yi [1 ]
Fu, Jian [1 ]
机构：
[1] Hefei Univ Technol, Sch Mat Sci & Engn, Inst Electro Ceram & Devices, Hefei 230009, Peoples R China
来源：
JOURNAL OF MATERIALS SCIENCE | 2010年 / 45卷 / 13期
基金：
中国国家自然科学基金;
关键词：
LEAD-FREE CERAMICS; PIEZOELECTRIC PROPERTIES; ADDITIVES; CEO2;
D O I：
10.1007/s10853-010-4413-8
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Superfine powders (similar to 100 nm) with compositions of (1 - x)(Bi0.5Na0.5)(0.94)Ba0.06TiO3 + xNb(5+) (BNTBT6 + xNb) with x from 0 to 0.02 were synthesized by an improved citrate sol-gel method using Nb2O5 as Nb5+ source. The sintering behavior, microstructure, and various electrical properties of BNTBT6 + xNb ceramics were investigated. The results indicated that the addition of a small amount of Nb5+ has no remarkable effect on the crystal structure and grain morphology, but the electrical properties of the ceramics are obviously influenced. The BNTBT6 + 0.005Nb compositions exhibit enhanced densification behavior and improved electrical properties of a piezoelectric constant d (33) similar to 205 pC/N and a planar electromechanical coupling factor k (p) similar to 33%.
引用
收藏
页码：3677 / 3682
页数：6
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