Formation and electrophysical properties of Y-containing positive temperature coefficient of resistance ceramics doped by calcium, strontium, and manganese

Abstract

Formation, microstructure, and electrophysical properties of positive temperature coefficient of resistance ceramics of the systems (Ba 0.996Y 0.004)TiO 3 and (Ba 0.746Ca 0.1Sr 0.15Y 0.004)TiO 3 with manganese as acceptor dopant have been investigated. Is has been shown that manganese ions increase the potential barrier at grain boundaries and form a high-resistance outer layer in PTCR ceramics. The resistance of grains, outer layers and grain boundaries, and the value of the temperature coefficient of resistance as a function of the manganese content of positive temperature coefficient of resistance materials have been investigated.