压电陶瓷已被广泛应用于航空航天、舰艇声纳、高速列车、汽车、精密仪器控制、移动通讯、办公及家用电子产品等领域，在全球已经形成了每年近百亿美元的巨大市场。然而，目前压电产业主力产品为对人体及环境有害的锆钛酸铅（ PZT）陶瓷。随着国际上对电子产品中使用含铅等有害材料的限制愈来愈严格，拥有巨大市场的压电陶瓷的无铅化已成为摆在全球面前的紧迫任务。准同相界（ MPB）是获得高压电性能的关键所在，现已开展了大量的研究工作，旨在揭示MPB的物理本质并基于MPB原理获得具有大压电效应及电致应变的环境友好型压电陶瓷。综述了3类性能最优的无铅压电材料体系：钛酸钡基（ BT）、铌酸钾钠基（ KNN）和钛酸铋钠基（ BNT）陶瓷，包括近年来在压电理论及实验方面的代表性研究进展。
Piezoelectric ceramics is a functional material which can convert mechanical energy into electrical energy. It can find wide applications ranging from our daily life to high?tech techniques and dominates a billion?dollar market. For half a century, the working horse of the field is the polycrystalline PbZr1-xTixO3(PZT), which is now globally resisted for containing the toxic element lead. Thus, the research of lead-free piezoelectric ceramic with high performance has been a hot topic all over the world. It is believed that the morphotropic phase boundary ( MPB) in phase diagram is the key to a?chieve high piezoelectric performance; great efforts have been made to build the MPB in lead?free system and reveal the physical nature of MPB. In the present paper, we review the recent progress, both on the experimental and theoretical, of the most promising lead?free ceramic systems, i?e? BaTiO3 , ( KNa) NbO3 and ( BiNa) TiO3 systems.
参考文献
| [1] | Bell AJ.Factors influencing the piezoelectric behaviour of PZT and other "morphotropic phase boundary" ferroelectrics[J].Journal of Materials Science,20061(1):13-25. |
| [2] | Damjanovic, D..Comments on Origins of Enhanced Piezoelectric Properties in Ferroelectrics[J].IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control,20098(8):1574-1585. |
| [3] | Wook Jo;Jean-Baptiste Ollagnier;Jong-Lo Park.CuO as a sintering additive for (Bi_(1/2)Na_(1/2))TiO_3-BaTiO_3-(K_(0.5)Na_(0.5))NbO_3 lead-free piezoceramics[J].Journal of the European Ceramic Society,201112(12):2107-2117. |
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