Dielectric, elastic and piezoelectric properties of SrLaGa3O7 and BaLaGa3O7 crystals with Melilite structure
Dielectric, elastic and piezoelectric properties of SrLaGa3O7 and BaLaGa3O7 crystals with Melilite structure
复制标题
DOI：
10.1016/j.jallcom.2015.05.219
复制
发表时间：
2015-10
影响因子：
6.2
通讯作者：
Chuanying Shen;Yuanyuan Zhang;Haohai Yu;Shujun Zhang;W. Cao;Ji-yang Wang;Huaijin Zhang
中科院分区：
文献类型：
--
作者：
Chuanying Shen;Yuanyuan Zhang;Haohai Yu;Shujun Zhang;W. Cao;Ji-yang Wang;Huaijin Zhang
采用阻抗法对黄长石SrLaGa 3 O 7和BaLaGa 3 O 7晶体的机电性能进行了全矩阵测试，结果表明两种晶体的机电性能变化很小。ε 11 T/ε 0、d14和k14分别为13.6、9.4-9.5 pC/N和17.1- 17.4%。建立了机电性能与微观结构之间的关系，解释了弹性关系和压电起源。在双旋转坐标系下研究了优化的机电性能。在25-500° C温度范围内，SrLaGa 3 O 7具有高电阻率（10.8Ohm· cm）、高弹性常数热稳定性（变化< 10%）和压电性能（变化最小为8%），使其成为高温传感应用的一个有吸引力的候选者。
A full matrix of electromechanical properties of Melilite SrLaGa 3 O 7 and BaLaGa 3 O 7 crystals was evaluated by the impedance method, with minimal variations being observed for the two crystals. The ε 11 T/ε 0, d 14 and k 14 were determined to be 13.6, 9.4–9.5 pC/N and 17.1–17.4%, respectively. The relationship between electromechanical properties and microstructures was established to explain the elastic relationship, and piezoelectric origin. The optimized electromechanical properties were investigated in double rotated coordinate. The high resistivity (∼ 10 8 Ohm· cm), high thermal stability of elastic constants (with variations of< 10%) and piezoelectric properties (with minimal variation of 8%) over the temperature range of 25–500° C, making SrLaGa 3 O 7 an attractive candidate for sensing applications at elevated temperatures.