PTCR properties of Sb2O3-doped (Ba,Sr)TiO3 |
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| Affiliation: | 1. Departamento de Física, Universidad Nacional del Sur and Instituto de Física del Sur, CONICET, Av. L. N. Alem 1253, 8000 Bahía Blanca, Buenos Aires, Argentina;2. Centro Atómico Bariloche, Comisión Nacional de Energía Atómica, Av. Bustillo 9500, 8400, S. C. de Bariloche, Rio Negro, Argentina;3. CINSO-CITEDEF, UNIDEF-CONICET, J.B. de La Salle 4397, 1603 Villa Martelli, Buenos Aires, Argentina;4. Instituto de Investigación e Ingeniería Ambiental, 3iA – UNSAM, Campus Miguelete, 25 de Mayo y Francia. 1650, San Martín, Buenos Aires, Argentina |
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| Abstract: | Perovskite barium–strontium titanate, (Ba,Sr)TiO3 was prepared and effects of Sb2O3 additives on its PTCR properties were investigated. The (Ba,Sr)TiO3 with 0.05～0.25 mol% Sb2O3 showed semiconducting PTCR behavior and anomalous grain growth was also observed when sintered at 1360 °C. It was considered that charge compensation by doping Sb2O3 as well as anomalous grain growth by sintering leads to resistivity reduction from insulating to semiconducting transition. |
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