压电
材料科学
钛酸钙
钛酸铅
钛酸酯
正交晶系
铁电性
衍射
压电系数
复合材料
烧结
电场
晶体结构
电介质
结晶学
陶瓷
光电子学
光学
物理
化学
量子力学
作者
Abdullah Riaz,Kerstin Witte,Wiktor Bodnar,E. Burkel
标识
DOI:10.1016/j.scriptamat.2020.07.043
摘要
Calcium titanate has an orthorhombic crystal structure and should not exhibit piezoelectric behavior. However, in the present study such behavior is observed in nanostructured calcium titanate prepared by sol–gel synthesis and field assisted sintering. This behavior is referred to as pseudo-piezoelectricity since it is generated by distorted structure. In-situ high-energy X-ray diffraction studies have been performed to investigate this behavior. Strain and defects in the nanostructured bulk material led to its piezoelectric response with non-180° domains reorientation and domains switching under external electric field. The piezoelectric constant is comparable with the piezoelectric constants of natural bone.
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