Title :
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
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;
Conference_Titel :
European Frequency and Time Forum & International Frequency Control Symposium (EFTF/IFC), 2013 Joint
Conference_Location :
Prague
DOI :
10.1109/EFTF-IFC.2013.6702303
