基于相变换能机理的反铁电陶瓷水声换能器初探  

Preliminary study on antiferroelectric ceramics underwater acoustic transducer based on transduction mechanism of phase transition

作　　者：吕可佳[1,2] 李俊宝[1] 尹义龙[1,2] 冯玉军[3] 

机构地区：[1]中国科学院声学研究所,北京100190 [2]中国科学院研究生院,北京100049 [3]西安交通大学,西安710049

出　　处：《应用声学》2010年第2期93-99,共7页Journal of Applied Acoustics

摘　　要：阐述了改性锆锡钛酸铅Pb（Zr，Sn，Ti）O3（PZST）反铁电陶瓷作为一种基于相变换能机理的大应变电致伸缩材料的性能特征以及作为水声换能器新型有源材料的优势。采用掺镧改性锆锡钛酸铅PbLa（Zr，Sn，Ti）O3（PLZST）反铁电陶瓷材料首次设计制作了纵振式反铁电陶瓷水声换能器。试验结果表明，PLZST反铁电陶瓷用于水声换能器研制在技术上是可行的，与压电陶瓷换能器比较，目前反铁电换能器样品的等效发射电压灵敏度提高3～5dB以上。根据实验情况，认为在发射电压灵敏度和声源级方面具有进一步提升的潜力。This paper discusses several properties based on the transduction mechanism of phase transformation of the lead zirconate titanate stannate antiferroelectric ceramic （Pb（Zr, Sn,Ti）O3, i.e., PZST）, for its advantages as an active transducer material. A longitudinal antiferroelectric ceramics underwater acoustic transducer is then for the first time designed and developed, which utilizes modified PbLa（Zr, Sn,Ti）O3（i.e., PLZST） antiferroelectric ceramics as active element. Experimental results indicate that the ceramic is technically feasible for underwater acoustic transducer applications. Compared with the piezoelectric ceramic transducer, antiferroelectric ceramic transducer shows better acoustic performance, presently up to 3-SdB enhancement in the equivalent transmitting voltage response. It can be expected that PLZST antiferroelectric ceramic may further improve the transducer performance in the transmitting voltage response and the acoustic source level, when some technical bottlenecks are overcome.

关 键 词：反铁电 相变陶瓷 水声换能器 

分 类 号：TB565.1[交通运输工程—水声工程]