抄録
Piezoelectric crystals are used as actuator, sensors and transducers in a great number of devices. In specially, high temperature applications are very important to use for pressure, force, acceleration and vibration sensors. Many kind of piezoelectric crystals, such as Lithium Niobate, Lithium Tantalate, Quartz and so on, have been applied for high temperature devices. But the most fundamental limitations are phase transitions and twinning occurrence with elevated temperature. A3BC3D2O14-type crystals, unlike above crystals, did not undergo a phase transition up to the melting temperature. They do not appear a phase transition and twinning with increasing temperature up to melting point. Thus, it is expected that A3BC3D2O14 -type crystals will be proposed possible solution to solve a problems for high temperature applications. A3BC3D2O14 -type crystals were investigated and grown for high temperature piezoelectric properties.
