静水压下锆锡钛酸铅铁电陶瓷相变和介电性能研究  

Phase transformation and dielectric properties of lead zirconate stannate titanate ferroelectric ceramic under hydraulic compression

作　　者：蒋冬冬[1,2] 谷岩[1] 冯玉军[2] 杜金梅[1] 

机构地区：[1]中国工程物理研究院流体物理研究所冲击波物理与爆轰物理实验室,绵阳621900 [2]西安交通大学电子材料与器件研究所,西安710049

出　　处：《物理学报》2011年第10期662-667,共6页Acta Physica Sinica

基　　金：中国工程物理研究院"双百人才工程"人选自选课题(批准号:2008R0107);国家自然科学基金(批准号:10875095);国家重点基础研究发展计划(批准号:2009CB623306)资助的课题~~

摘　　要：研究了铌掺杂锆锡钛酸铅铁电陶瓷Pb0.99Nb0.02[(Zr0.90Sn0.10)0.96Ti0.04]0.98O3(PZST90/10-4-2Nb)在静水压(0—300MPa)下的电荷释放量和介电性能.对压力诱导的低温铁电三方(FR(LT))→反铁电正交(AO)相变进行了研究.PZST90/10-4-2Nb铁电陶瓷分为未极化、极化和压力去极化三种.极化PZST90/10-4-2Nb陶瓷FR(LT)→AO相变过程中,电荷释放量为29.3μC/cm2,相变压力为140MPa.介电性能表明:极化PZST90/10-4-2Nb陶瓷相变压力为136MPa,而未极化陶瓷相变压力为104MPa,压力去极化陶瓷未表现出明显的相变特征.Nb-doped lead zirconate stannate titanate ferroelectric ceramic with composition Pb0.99Nb0.02[（Zr0.90Sn0.10）0.96Ti0.04]0.98O3（PZST 90/10-4-2Nb） is studied in a hydraulic pressure range of 0—300 MPa by released charge and dielectric measurements.Pressure-induced low temperature phase transition from ferroelectric rhombohedral（FR（LT）） structure to antiferroelectric orthorhombic（AO） strueture is investigated.Unpoled,poled and pressure-depolarized PZST 90/10-4-2Nb ferroelectric ceramics are used.The released charge quantity is 29.3 μC/cm2 and the threshold pressure is 140 MPa during the phase transformation from FR（LT） structure to AO strueture.Dielectric properties show that the threshold pressure of the phase transformation from FR（LT） structure to AO structure is 136 MPa for poled ceramic and 104 MPa for unpoled ceramic.Obvious characteristic of phase transformation is not observed in pressure-depolarized ceramic.

关 键 词：静水压 铁电陶瓷 相变 介电 

分 类 号：TQ174.1[化学工程—陶瓷工业]