采用常规固相反应两步烧结法制备的钛酸钡陶瓷具有高压电性能

Y. Tan, Jialiang Zhang, Zong Zhang, Chun-lei Wang
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引用次数: 0

摘要

以BaCO3和TiO2粉末为起始原料,采用常规固相反应途径,尝试采用两步烧结技术制备结构致密、晶粒小的BaTO3陶瓷。结果表明,两步烧结技术对于制备亚微米级的BaTiO3粉体也是有效的。成功制备出相对密度高达98.2%、晶粒尺寸约为1.7µm的BaTiO3陶瓷。研究了其介电和压电性能,并在优化的烧结条件下与普通烧结BaTiO3陶瓷进行了比较。新工艺制备的陶瓷具有d33 = 390 pC/N、kp = 0.40的高压电性能,大大优于普通烧结的d33 = 300 pC/N、kp = 0.32的陶瓷。结果表明,以低成本制备具有理想微观结构和高压电性能的BaTiO3陶瓷是可能的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
High piezoelectric properties of batio3 ceramics prepared by two-step sintering technique through conventional solid-state reaction route
A two-step sintering technique was attempted to acquire BaTO3 ceramics with dense and small-grained microstructure through conventional solid-state reaction route, in which BaCO3 and TiO2 powders are adopted as the starting raw materials. It has been found that the two-step sintering technique is effective even for the synthesized BaTiO3 powder of submicron-sized particles. A BaTiO3 ceramic with relative density as high as 98.2% and small grain size of about 1.7 µm was successfully obtained. Its dielectric and piezoelectric properties were investigated and compared with those of the ordinarily-sintered BaTiO3 ceramic under an optimized sintering condition. The ceramic prepared by the new technique shows high piezoelectric properties of d33 = 390 pC/N and kp = 0.40 and is thus much superior to the ordinarily-sintered one, which displays only d33 = 300 pC/N and kp = 0.32. The results demonstrate that fabricating BaTiO3 ceramics with ideal microstructure and high piezoelectric properties at low cost is possible.
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