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Growth and characterization of piezoelectric Sr3Ga2Ge4O14 crystals
Anhua Wu1, Jiayue Xu, Juan Zhou
1Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, People's Republic of China.
Abstract:
Langasite (La3Ga5SiO14, LGS) and its isomorphs, have attracted much attention for their potential for surface acoustic wave (SAW) and bulk acoustic wave (BAW) applications. Among these homologous compounds, Sr3Ga2Ge4O14 (SGG) attracted our attention due to its superior piezoelectric properties and lower growth temperature. In this work, SGG single crystal has been grown successfully by the vertical Bridgman method with crucible-sealing technique. SGG wafers of 2 in. have been fabricated. The basic physical properties of SGG crystals were measured. The results demonstrate that piezoelectric and mechanical properties of SGG crystals are better than that of LGS crystal and it is expected to be a potential substrate material for SAW and BAW applications.
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