Characterization of elastic constants of Ca 3 TaGa 3 Si 2 O 14 at high temperatures by Antenna Transmission Acoustic Resonance

In this work, the elastic constants of Ca 3 TaGa 3 Si 2 O 14 (CTGS) crystals are characterized in a wide temperature range up to 800°C according to a recently proposed method: Antenna Transmission Acoustic Resonance (ATAR) method. In the ATAR measurement, the electrodes and the wires clamp are not required, which could help to avoid the influences of the mass and force loadings. More importantly, by the ATAR method, all the elastic constants could be obtained through a single frequency sweep of a single randomly cut sample, which makes the measurement time-saving. The system and procedures for the ATAR measurement are presented. And the elastic constants and their temperature dependence are all obtained and compared with the results determined by the IEEE dynamic method.