Grain size effect on piezoelectric properties of BaTiO3 ceramics
Grain size effect on piezoelectric properties of BaTiO3 ceramics
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DOI：
10.7567/jjap.57.0902bb
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发表时间：
2018-07
影响因子：
1.5
通讯作者：
T. Hoshina;S. Hatta;H. Takeda;T. Tsurumi
中科院分区：
文献类型：
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作者：
T. Hoshina;S. Hatta;H. Takeda;T. Tsurumi
研究了晶粒度对纯BaTiO_3陶瓷压电性能的影响。采用常规烧结法和两步烧结法制备了不同晶粒度的BaTiO3陶瓷。当晶粒度大于1.2µm时，压电应变常数d33随晶粒度的减小而增大，当晶粒度小于1.2µm时，d33随晶粒度的减小而减小，最大值为460pC/N，约为粗晶BaTiO3陶瓷的3倍。D33的增加可以很好地解释为磁畴壁的贡献，而D33的减少可以理解为晶界效应。另一方面，随着晶粒度的减小，BaTiO_3陶瓷的压电常数G33逐渐增大，压电常数d_(33)、g_(33)和机械品质因数Q_m均随晶粒度的减小而增大。
We demonstrated the grain size effect on piezoelectric properties of pure BaTiO3 ceramics. BaTiO3 ceramics with various grain sizes were prepared by conventional and two-step sintering methods. The piezoelectric strain constant d33 increased with decreasing grain size when the grain size was more than 1.2 µm, whereas it decreased when the grain size was below 1.2 µm. The maximum d33 was 460 pC/N, which is approximately three times larger than that of coarse BaTiO3 ceramics. The increase in d33 was well explained by the domain-wall contribution, while the decrease in d33 was understood as the grain boundary effect. On the other hand, the piezoelectric voltage constant g33 increased with decreasing grain size down to 0.6 µm. The piezoelectric constants d33 and g33, and the mechanical quality factor Qm can be controlled by the grain size of BaTiO3 ceramics.