Electrical and microstructural properties of CaTiO3-doped K1/2Na1/2NbO3-lead free ceramics

被引：0
作者：
L RAMAJO
R PARRA
M A RAMÍREZ
M S CASTRO
机构：
[1] Institute of Research in Materials Science and Technology (INTEMA),Faculdade de Engenharia de Guaratinguetá (FEG)
[2] (CONICET – Universidad Nacional de Mar del Plata),undefined
[3] Universidade Estadual Paulista (UNESP),undefined
[4] Av. Dr. Ariberto Pereira da Cunha,undefined
来源：
Bulletin of Materials Science | 2011年 / 34卷
关键词：
Na; K; NbO; CaTiO; lead-free ceramics; electrical properties;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Microstructure, electrical properties and dielectric behaviour of K1/2Na1/2NbO3 (KNN) and CaTiO3-modified K1/2Na1/2NbO3 (CTO-KNN) systems, were investigated. Discs doped with 0 to 0·55% mol of CaTiO3 (CTO) were sintered at 1125°C for 2 h. Although minority phases were found in doped samples, CaTiO3 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.
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页码：1213 / 1217
页数：4
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