铁电材料研究进展及其在飞行器上的应用

 铁电材料是具有驱动和传感 2种功能的机敏材料,可以块材、膜材 (薄膜和厚膜 )和复合材料等多种形式应用,在微电子机械和智能材料与结构系统中具有广阔的潜在应用市场。近年来铁电陶瓷材料获得很大发展,例如弛豫型铁电陶瓷,反铁电 -铁电相变型铁电陶瓷都取得了实际应用。铁电材料中大应变弛豫型铁电单晶材料研制成功,是近 50年来取得的突破性进展。主要介绍了智能材料与结构相关的铁电材料特点及其在飞行器上的应用前景

RECENT ADVANCES IN SENSOR AND ACTUATOR MATERIALS AND THEIR APPLICATION IN AIRCRAFT

Ferroelectric material is one of the smart materials with both sense and actuation functions. In recent years, the advances in these materials are very fast. Especially, new single crystals of relaxor ferroelectric compositions have been developed by Park and Shrout. This is an exciting breakthrough, because strain of materials has been improved by a factor of 10. The strain up to 1.7% with excellent 1inearity and negligible hysteresis has been demonstrated in PZN-PT ceramics systems. Elastic energy density of more than 66 000 J/m 3 and blocking force of 35 MPa have been recorded. Other parameters are also higher than those of common ferroceramics. Ferroelectric polymer is reviewed too. A new treatment for Poly(VDF/TrFE) which converts the ferroelectric to a relaxor ferroelectric has been developed. It is presented that ferroelectric materials could find application in aircraft to solve the issues of aircraft.