Aging Effect on Lanthanum Doped Ferroelectric Lead Titanate Ceramics
来源期刊：JOURNAL OF RARE EARTHS2006年增刊第2期
论文作者：Jin Xueqin Zhu Yudan Zhu Jie Sun Dazhi
Key words：aging effect; ferroelectric; reverse transformation temperature; (Pb,La)TiO3; rare earths;
Abstract: Ferroelectric devices are widely applied in many fields, such as energy conversion and communication. The aging effect in ferroelectric materials plays a central role in the reliability of the related equipments. But it is very difficult to understand the origin of aging effect in ferroelectrics because these materials possess different defects and exhibit various aging behavior. The reverse transition temperature in lead titanate doped with lanthanum increases during aging at ferroelectric phase was reported. It is well known that lattice defects, such as vacancies and solute atoms, are ubiquitous in crystalline solids. These point defects affect physical properties in ferroelectrics significantly. The abnormal increase of the reverse transition temperature was discussed in terms of diffusion of point defects during aging. Dielectric performance in the material after aging was measured and discussed as well.
Jin Xueqin1，Zhu Yudan1，Zhu Jie1，Sun Dazhi1
(1.Department of Chemistry, Shanghai Normal University, Shanghai 200234, China)
Abstract:Ferroelectric devices are widely applied in many fields, such as energy conversion and communication. The aging effect in ferroelectric materials plays a central role in the reliability of the related equipments. But it is very difficult to understand the origin of aging effect in ferroelectrics because these materials possess different defects and exhibit various aging behavior. The reverse transition temperature in lead titanate doped with lanthanum increases during aging at ferroelectric phase was reported. It is well known that lattice defects, such as vacancies and solute atoms, are ubiquitous in crystalline solids. These point defects affect physical properties in ferroelectrics significantly. The abnormal increase of the reverse transition temperature was discussed in terms of diffusion of point defects during aging. Dielectric performance in the material after aging was measured and discussed as well.
Key words:aging effect; ferroelectric; reverse transformation temperature; (Pb,La)TiO3; rare earths;
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