摘要
The variation of dielectric,ferroelectric and piezoelectric characteristics of BaZrO_(3)emodified(Ba_(0.85)Ca_(0.15))TiO_(3) ceramics,(1-x)(Ba_(0.85)Ca_(0.15))TiO_(3)-xBaZrO_(3),have been investigated together with the structure evolution.The crystal structure at room-temperature varies from tetragonal to metrically cubic through orthorhombic and rhombohedral,and the morphotropic phase boundary(MPB)is determined around x=0.12 where the significantly enhanced dielectric,ferroelectric and piezoelectric characteristics are achieved.With increasing x,the present ceramics indicate the crossover from normal to diffused and relaxor ferroelectric,and the evolution process is explored systematically.
基金
The present work was supported by National Natural Science Foundation of China under grant Nos.51790493 and 51961145105.
