Properties of piezoelectric single crystals Ca3TaGa3Si2O14 at high temperature and high vacuum conditions

Author

Hongfei Zu ; Huiyan Wu ; Yizhong Wang ; Wang, Q.-M. ; Shujun Zhang ; Shrout, Thomas R.

Author_Institution

Dept. of Mech. Eng. & Mater. Sci., Univ. of Pittsburgh, Pittsburgh, PA, USA

fYear

2013

fDate

21-25 July 2013

Firstpage

988

Lastpage

991

Abstract

In this paper, a kind of fully ordered langasite family crystals Ca₃TaGa₃Si₂O₁₄ (CTGS) were grown by the Czochralski pulling method and cut into lateral mode. The dielectric, elastic and piezoelectric properties of them were investigated as functions of temperature (up to 1073.15 K) and pressure (up to E-7 torr). It was found that all the crystals exhibited pressure stability properties and temperature dependent characteristics. According to the calculation, the dielectric permittivity, elastic coefficient and piezoelectric coefficient were about 17.66, 9.06 pm²/N and 3.77 pC/N, respectively. The good properties make CTGS promising candidates for sensing applications at high temperature and high vacuum conditions.

Keywords

calcium compounds; crystal growth from melt; elasticity; gallium compounds; permittivity; piezoelectric materials; piezoelectricity; tantalum compounds; Ca₃TaGa₃Si₂O₁₄; Czochralski pulling method; dielectric permittivity; dielectric properties; elastic coefficient; elastic properties; fully ordered langasite family crystals; high temperature conditions; high vacuum conditions; lateral mode; piezoelectric coefficient; piezoelectric properties; piezoelectric single crystals; pressure stability properties; temperature dependent characteristics; Crystals; Dielectrics; Permittivity; Resonant frequency; Temperature; Temperature sensors; Thermal stability; high temperature; high vacuum; langasite;

fLanguage

English

Publisher

ieee

Conference_Titel

European Frequency and Time Forum & International Frequency Control Symposium (EFTF/IFC), 2013 Joint

Conference_Location

Prague

Type

conf

DOI

10.1109/EFTF-IFC.2013.6702303

Filename

6702303