학술논문
Electrical and microstructural properties of CaTiO-doped KNaNbO-lead free ceramics.
Document Type
Article
Author
Source
Subject
*TITANIUM oxides
*ELECTRIC properties of metals
*METAL microstructure
*CERAMIC materials
*SINTERING
*PERMITTIVITY
*PARTICLE size distribution
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Language
ISSN
0250-4707
Abstract
Microstructure, electrical properties and dielectric behaviour of KNaNbO (KNN) and CaTiO-modified KNaNbO (CTO-KNN) systems, were investigated. Discs doped with 0 to 0·55% mol of CaTiO (CTO) were sintered at 1125°C for 2 h. Although minority phases were found in doped samples, CaTiO was not detected. It was also observed that CTO changed the microstructure and grain size of KNN drastically. Also, the Curie temperature and permittivity values decreased. Addition of CTO between 0·15 and 0·45 mol% decreases the density and dielectric values. Samples prepared with higher content of CTO than 0·45 mol% showed better electrical properties. [ABSTRACT FROM AUTHOR]