TY - JOUR
T1 - Dielectric, elastic and piezoelectric properties of SrLaGa3O7 and BaLaGa3O7 crystals with Melilite structure
AU - Shen, Chuanying
AU - Zhang, Yuanyuan
AU - Yu, Haohai
AU - Zhang, Shujun
AU - Cao, Wenwu
AU - Wang, Jiyang
AU - Zhang, Huaijin
N1 - Funding Information:
The authors would like to thank Professor Thomas R. Shrout for his helpful discussion. The authors from Shandong University acknowledged the National Natural Science Foundation of China (Grant No. 51372139 ). The author Y. Zhang acknowledged the National Natural Science Foundation of China (Grant No. 51302158 ).
Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2015/7/8
Y1 - 2015/7/8
N2 - Abstract A full matrix of electromechanical properties of Melilite SrLaGa3O7 and BaLaGa3O7 crystals was evaluated by the impedance method, with minimal variations being observed for the two crystals. The ε11T/ε0, d14 and k14 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 (∼108 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 SrLaGa3O7 an attractive candidate for sensing applications at elevated temperatures.
AB - Abstract A full matrix of electromechanical properties of Melilite SrLaGa3O7 and BaLaGa3O7 crystals was evaluated by the impedance method, with minimal variations being observed for the two crystals. The ε11T/ε0, d14 and k14 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 (∼108 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 SrLaGa3O7 an attractive candidate for sensing applications at elevated temperatures.
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U2 - 10.1016/j.jallcom.2015.05.219
DO - 10.1016/j.jallcom.2015.05.219
M3 - Article
AN - SCOPUS:84936818137
SN - 0925-8388
VL - 647
SP - 1069
EP - 1074
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
M1 - 34403
ER -