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

6533b824fe1ef96bd1280205

RESEARCH PRODUCT

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

Anna Kalvane Ilze Smeltere Oskars Grigs Maija Antonova M. Livinsh

subject

lead-free lcsh:TN1-997 sintering Materials science Dopant Doping Analytical chemistry Sintering Mineralogy Dielectric Crystal structure Microstructure potassium sodium niobate visual_art piezoelectric ceramics visual_art.visual_art_medium oxide additives General Materials Science Ceramic lcsh:Mining engineering. Metallurgy Monoclinic crystal system

description

Lead-free potassium sodium niobate (K0.5Na0.5)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

year	journal	country	edition	language
2011-03-01	Medžiagotyra

10.5755/j01.ms.17.1.251 http://matsc.ktu.lt/index.php/MatSc/article/view/251

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