Artículos de revistas
Electrical and microstructural properties of CaTiO3-doped K1/2Na1/2NbO3-lead free ceramics
Fecha
2011-10-01Registro en:
Bulletin of Materials Science. Bangalore: Indian Acad Sciences, v. 34, n. 6, p. 1213-1217, 2011.
0250-4707
10.1007/s12034-011-0241-y
WOS:000298618700009
WOS000298618700009.pdf
Autor
Univ Nacl Mar del Plata
Universidade Estadual Paulista (Unesp)
Institución
Resumen
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 degrees 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.