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.
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