PbLa(Zr,Sn,Ti)O_3反铁电陶瓷的静电场能存储特性  

Static Electric Field Energy-Storaging Characteristics of PbLa(Zr,Sn,Ti)O_3 Ceramics

作　　者：张崇辉[1] 朱长军[1] 王晓娟[1] 

机构地区：[1]西安工程大学理学院,陕西西安710048

出　　处：《高压物理学报》2016年第4期286-290,共5页Chinese Journal of High Pressure Physics

基　　金：陕西省教育厅科研项目(14JK1296);西安工程大学博士基金(BS1207)

摘　　要：为了研究微量掺镧的反铁电陶瓷锆锡钛酸铅(PbLa(Zr,Sn,Ti)O_3,PLZST)的静态存储电场能量的特性,采用传统的氧化物固态反应的陶瓷制备工艺,制备了4个锆锡比不同的PLZST陶瓷样品,样品组分均位于PLZST相图中铁电-反铁电相界附近。通过等静压压致放电的实验方法研究了PLZST陶瓷放电特性。结果表明,经过充分极化的PLZST处于亚稳态的铁电相,在压力作用下,PLZST发生铁电反铁电相变,把在直流电场下极化时储存于PLZST陶瓷的静电场能量瞬间释放出来,从而得到极高功率的电脉冲。最终,样品完全退极化,最大放电电流密度达到5.0nA/cm^2,样品的静电场储能密度最高可达9.45J/cm^3,因此PLZST陶瓷是爆电换能电源的理想材料。In order to find out about the static electric field energy-storaging characteristics of lead zirconate stannate titanate ceramics doped with lanthanum,PbLa（Zr,Sn,Ti）O3（PLZST）ceramics with different Sn/Zr ratios were fabricated using the conventional solid-state reaction of oxide method.The compositions of samples are all close to phase bound of ferroelectric（FE）and antiferroelectric（AFE）.The energy-storaging characteristics of PLZST ceramics were investigated experimentally through hydrostatic pressure induced discharging.The results show polarized PLZST ceramics in the DC field are in a meta-stable FE state.Phase transitions from FE to AFE occur under the influence of the pressure,and the static electric field energy stored via polarization is released instantly,which leads to high-power current pulses.PLZST ceramics are totally depolarized after the discharging.The largest discharge current density and the largest electric field density are 5.0nA/cm^2 and 9.45J/cm^3 respectively.PLZST ceramics are ideal materials for explosive energy converters power supply.

关 键 词：反铁电陶瓷 静电场能量 等静压 相变 

分 类 号：O487[理学—固体物理]