Abstract
The electrical properties and microstructure of (Ba,Y)TiO3 PTCR ceramics were studied. The results indicate that the Mn ions increase the intergranular barrier height and produce a high-resistance layer on the grain surface. The temperature-dependent resistances of the grain bulk, surface layer, and grain boundaries, the temperature coefficient of resistance, and the magnitude of the varistor effect were assessed as a function of Mn content.
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V'yunov, O.I., Kovalenko, L.L., Belous, A.G. et al. Effect of the Distribution of Manganese Ions on the Properties of Mn-Doped (Ba,Y)TiO3 PTCR Ceramics. Inorganic Materials 39, 190–197 (2003). https://doi.org/10.1023/A:1022159032378
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DOI: https://doi.org/10.1023/A:1022159032378