Grain size effects on piezoelectric properties of BaTiO3 ceramics prepared by spark plasma sintering
Grain size effects on piezoelectric properties of BaTiO3 ceramics prepared by spark plasma sintering
复制标题
晶粒尺寸对放电等离子烧结BaTiO3陶瓷压电性能的影响
DOI：
10.1007/s10854-016-4518-1
复制
发表时间：
2016-06-01
影响因子：
2.8
通讯作者：
Chen, R. R.
中科院分区：
文献类型：
--
作者：
Guo, F. Q.;Zhang, B. H.;Chen, R. R.
摘要 系统研究了晶粒尺寸对放电等离子烧结BaTiO3陶瓷介电常数、压电常数d33和电场应变的影响。结果发现，在我们研究的晶粒尺寸范围内，它们都表现出明显的晶粒尺寸效应，而它们随晶粒尺寸的变化却明显不同。随着晶粒尺寸的增加，介电常数由于畴壁密度的减小而单调减小，压电常数d33由于晶畴排列的增加而不断增加，这与180°晶域的增加有关，并且晶界对90°晶域切换的钳位效应降低，电场引起的应变在中间晶粒尺寸处最大化，这是由于可逆90°晶域切换的最大化。
AbstractGrain size effects on permittivity, piezoelectric constant d33 and electric field-induced strain of BaTiO3 ceramics prepared by spark plasma sintering were studied systematically in this study. It was found that in our studied grain size range they all showed clear grain size effects, while their variations with grain size were distinctly different. With increasing grain size, the permittivity decreases monotonically due to decreased domain wall density, the piezoelectric constant d33 keeps increasing because of the increased domain alignment which is related to the increase of 180° domain and decreased clamping effect on 90° domain switching by grain boundaries, the electric field-induced strain maximize at intermediate grain size which is due to the maximization of reversible 90° domain switching.