Effect of Grain Size of BaTiO3 Ceramics on Dielectric Properties
Effect of Grain Size of BaTiO3 Ceramics on Dielectric Properties
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DOI：
10.1080/00150191003697377
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发表时间：
2010-01-01
期刊：
影响因子：
0.8
通讯作者：
Luo Guanghua
中科院分区：
文献类型：
--
作者：
Ding Shihua;Song Tianxiu;Luo Guanghua
以溶胶-凝胶法制备的超细BaTiO 3粉体为原料，采用常规固相烧结和两段烧结法制备了粒径为0.56 ~ 120 μ m的BaTiO 3陶瓷。研究了不同晶粒尺寸的BaTiO 3陶瓷的介电、铁电和压电性能。BaTiO_3陶瓷的介电性能表现出明显的晶粒尺寸效应。矫顽场在晶粒尺寸为1.1 μ m时显示出最大值7.14 kV/cm，压电常数d33在8.9 μ m时显示出最大值204 pC/N。BaTiO_3陶瓷的回复极化随晶粒尺寸的增大而增大。
BaTiO3 ceramics with different grain size from 0.56 to 120 m were prepared by the conventional solid state processing and two-stage sintering method using ultrafine BaTiO3 powders prepared by a sol-gel method. Dielectric, ferroelectric and piezoelectric properties of BaTiO3 ceramics with different grain size were investigated. The grain size effect of BaTiO3 ceramics on dielectric appeared clearly. The coercive field showed a maximum value of 7.14 kV/cm at the grain size of 1.1 m and piezoelectric constant d33 showed a maximum value of 204 pC/N at 8.9 m. The remanent polarization of BaTiO3 ceramics increased with the increasing of the grain size.