复合相变陶瓷材料的F_(RL)-F_(RH)相变研究

Study on FRL-FRH Phase Transition in Composite Ceramic Material

制备了低温铁电菱方相（FRL）-高温铁电菱方相（FRH）相交复合陶瓷材料，利用计算机模拟了复合陶瓷材料的相交行为，结果表明，在复相陶瓷材料中，存在着离子扩散，离子扩散对于宏观热释电效应的影响取决于相关材料的相变特性．计算机模拟的方法可以有效地用于分析复合材料的离子扩散情形，为新型功能材料的设计与研究提供帮助．

FRL-FRH phase transitional composite ceramics were prepared. The pyroelectric effect of theceramics was investigated. The output of pyroelectric current during the FRL-FRH phase transitionwas simulated by a computer. The results indicated that ion diffussion exists on the interfacebetween neighbour compositions. The influence of ion diffussion to the macroscopic pyroelectriceffect depends on the phase transitional property of relative compositions. The computer speculationmethod for pyroelectric current of multicomposition ceramics is an effective way to analyse thesituation of ion diffussion, and it is also helpful to design and study new functional materials.