Title

Dielectric, elastic and piezoelectric properties of SrLaGa3O7 and BaLaGa3O7 crystals with Melilite structure

RIS ID

117888

Publication Details

Shen, C., Zhang, Y., Yu, H., Zhang, S., Cao, W., Wang, J. & Zhang, H. (2015). Dielectric, elastic and piezoelectric properties of SrLaGa3O7 and BaLaGa3O7 crystals with Melilite structure. Journal Of Alloys And Compounds, 647 1069-1074.

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 , 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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Link to publisher version (DOI)

http://dx.doi.org/10.1016/j.jallcom.2015.05.219