The Effect of Dopants on Sintering and Microstructure of Lead-free KNN Ceramics

Medžiagotyra

Oskars GRIGS¹  Ilze SMELTERE²  Anna KALVANE³  Maija ANTONOVA³  Maris LIVINSH³ 

[1] Riga Technical University;University of Latvia, Riga Technical University;University of Latvia;

关键词: potassium sodium niobate;    lead-free;    oxide additives;    piezoelectric ceramics;    sintering;   

DOI  :  10.5755/j01.ms.17.1.251

来源: DOAJ

【 摘 要 】

Lead-free potassium sodium niobate (K_0.5Na_0.5)NbO₃ (KNN) has been prepared via conventional ceramic processing method. The influence of 0.5 wt% - 1.5 wt% MnO₂ and WO₃ addition on the sintering, crystallographic structure, microstructure and dielectric properties of KNN has been investigated. Optimal sintering temperatures of KNN ceramics were observed to be in the narrow interval: 1090 °C - 1110 °C for MnO₂ doped KNN; 1150 °C - 1170 °C for pure KNN and doped with WO₃. XRD patterns showed that all the samples have single perovskite structure with monoclinic structure. Microstructure of ceramics was changed greatly by using dopants.

http://dx.doi.org/10.5755/j01.ms.17.1.251

【 授权许可】

Unknown