Title :
Lead-free high-temperature barium titanate-based PTCR ceramics and its electrical properties
Author :
Plutenko, T.A. ; V´yunov, O.I.
Author_Institution :
Vernadskii Institute of General & Inorganic Chemistry, Kyiv, Ukraine
Abstract :
The (1−x)BaTiO3-x{Na,K}0.5Bi0.5TiO3 solid solutions have been synthesized by solid-state reaction technique. The parameters of the crystal structure of the ceramic samples were determined by means of Rietveld full-profile X-ray analysis. With increasing x, the values of ρmax and ρmin increase due to the growth of potential barrier at grain boundaries. It has been found that in (1−x)BaTiO3-x{Na,K}0.5Bi0.5TiO3 system the grain boundary and the outer layer region make a contribution to the PTCR effect.
Keywords :
Barium; Ceramics; Grain boundaries; Lead; Solids; Titanium compounds; PTCR; complex impedance analysis; lead-free materials; perovskite;
Conference_Titel :
Oxide Materials for Electronic Engineering (OMEE), 2012 IEEE International Conference on
Conference_Location :
Lviv, Ukraine
Print_ISBN :
978-1-4673-4491-3
DOI :
10.1109/OMEE.2012.6464755
