Abstract

The effect of modification (in the А and В sublattices) on the crystal structure parameters, microstructure, and dielectric and local piezoelectric properties of perovskite ceramics (1 – x)(K_0.5Na_0.5)NbO₃–xLa(Ag_0.5Sb_0.5)O₃ was studied. At increased concentration of the second component, the lattice volume and average grain diameter decreased, and the temperature of the polymorphic transition and Curie temperature lowered. The dielectric and effective piezoelectric properties of the samples were found to depend nonmonotonically on the composition, average grain diameter, and degree of texturing of the ceramics.

中文翻译：

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改性铌酸钾钠陶瓷的合成与性能

摘要

改性（在 A 和 B 亚晶格中）对钙钛矿陶瓷 (1 – x )(K _0.5 Na _0.5 )NbO ₃ – x La(Ag _0.5 Sb _0.5 ) 的晶体结构参数、微观结构、介电和局部压电性能的影响)O ₃进行了研究。随着第二组分浓度的增加，晶格体积和平均粒径减小，多晶型转变温度和居里温度降低。发现样品的介电和有效压电性能非单调地取决于陶瓷的组成、平均粒径和纹理化程度。