Abstract
The effect of Co3O4 content on the microstructure, structure, and electrical properties of SnO2–Cr2O3–Sb2O5 ceramic samples was investigated in the present work. The system under study was (99.9–X)% SnO2–X%Co3O4–0.05%Sb2O5–0.05% Cr2O3, where X=0, 0.5, 1, 2, or 4mol%. For a thorough study of this ceramic system, thermal analysis, X-ray diffraction (XRD) with Rietveld refinement, and scanning electron microscopy (SEM) characterization were carried out. It was found that the spinel phase content increases from 3% for the lowest Co3O4 dopant concentration up to 15% as the dopant content increases to 4%. As for the electrical properties of the studied system, the samples showed high values of breakdown electric field (from 2994.51 to 3218.38Vcm−1) and therefore the samples may be suitable for high-voltage applications.
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