Correlation between surface texture and chemical composition in undoped, hard, and soft piezoelectric PZT ceramics
Correlation between surface texture and chemical composition in undoped, hard, and soft piezoelectric PZT ceramics
复制标题
DOI：
10.1111/j.1151-2916.1998.tb02397.x
复制
发表时间：
1998-03-01
影响因子：
3.9
通讯作者：
Hoffmann, MJ
中科院分区：
文献类型：
--
作者：
Hammer, M;Monty, C;Hoffmann, MJ
压电锆钛酸铅（PZT）陶瓷的电性能和机械性能受到畴壁运动的强烈影响，畴壁运动可以通过在钙钛矿结构内的离子取代来定制。根据掺杂剂的化合价和离子半径，通过铅和/或氧空位实现不同的畴迁移率。（掺银），软（镧掺杂的）和未掺杂的PZT陶瓷。烧结后施加的机械应力导致表面附近的纹理化，因为90度畴的铁弹性行为，通过X射线衍射法（XRD）分析四重F-T（002）-和F-T（200）-峰强度，使用高斯分布函数的最小二乘精修，随后对样品进行退火以去除表面织构，并再次通过XRD测量进行表征。然而，退火的样品仍然显示出优选的畴取向，其只能通过对粉碎的样品进行第二次退火来去除，四方添加剂体系的比较清楚地揭示了镧掺杂PZT陶瓷的最大畴迁移率，而银掺杂和未掺杂的样品具有相似的铁弹行为。此外，所有组合物的表面纹理取决于所施加的机械应力，并且不能通过热处理完全去除。
The electrical and mechanical properties of piezoelectric lead zirconate titanate (PZT) ceramics are strongly influenced by domain-wall motion, which can be tailored via the substitution of ions within the perovskite structure, Different domain mobilities are achieved by lead and/or oxygen vacancies, according to the valency and ionic radius of the dopants, To quantify the surface near domain mobility, hard (silver-doped), soft (lanthanum-doped), and undoped PZT ceramics have been prepared, An applied mechanical stress after sintering causes texturing near the surface, because of the ferroelastic behavior of the 90 degrees domains, The texture is quantified via X-ray diffractometry (XRD) analysis of the tetragonal F-T(002)- and F-T(200)-peak intensities, using least-squares refinement with Gaussian profile functions, The samples are subsequently annealed to remove the surface texture and again characterized via XRD measurements, However, annealed samples still reveal a preferred domain orientation that can be removed only by a second annealing of the pulverized samples, A comparison of the tetragonal additive systems clearly reveals the greatest domain mobility for lanthanum-doped PZT ceramics, whereas the silver-doped and undoped samples have similar ferroelastic behavior, Furthermore, the surface texture of all the compositions is dependent on the applied mechanical stress and cannot be removed completely by heat treatment.