PZT95/5铁电陶瓷的掺杂改性研究  

Study on Modified PZT95/5 Ferroelectric Ceramics

作　　者：杜辉[1] 孙大志[1] 钟妮[1] 瞿翠凤[1] 姚春华[1] 金绮华[1] 林盛卫[1] 

机构地区：[1]中国科学院上海硅酸盐研究所,上海200050

出　　处：《无机材料学报》2003年第2期320-324,共5页Journal of Inorganic Materials

基　　金：国家自然科学基金(50172055);上海市科技发展基金(015261048)

摘　　要：采用固相烧结法制备锆钛酸铅95/5(PZT95/5)材料,以“相同化合价,不同原子半径;相近原子半径,不同化合价”的原则,选择了碱金属族、碱土金属族元素的碳酸盐以及Fe2O3、SiO2、Nb2O5、WO3等作为掺杂物分别对其进行掺杂改性.研究了掺杂对材料介电性能、极化性能和低温-高温铁电相的相变温度的影响.发现受主掺杂使得材料的介电常数降低,施主掺杂使得材料的介电常数提高;剩余极化随着掺杂离子的化合价增大而增大;制备得到了低温-高温铁电相相变在15℃的铁电材料,在实际应用上有重要意义.PZT95/5 samples were prepared with the conventional ceramic process. Based on the principle of 'the same valance, different ionic radius; similar ionic radius, different vaJances', the additives such as alkali-metal carbonates, alkali-earth-metal carbonates, Fe2O3, SiO2, Nb2O5 and WO3 were doped into the PZT95/5 separately. The dielectric properties, polarization properties and F-RL-F-RH phase transition behavior were studied. The acceptor additives make dielectric constant of the material decrease, and the donor additives demonstrate the opposite effect; The remnant polarization in the material climes up with the increase of the cationic valances of additives; The pure PZT95/5 ferroelectric material obtained possesses F-RL-F-RH phase transition temperature at 15degreesC, this is significant for its application.

关 键 词：PZT95/5 FRL-FRH 热释电 铁电陶瓷 介电性能 

分 类 号：TM534[电气工程—电器]