Solid-phase sintering was used to make ceramic from a mixture of ZnO, SnO2, and TiO2 nanopowders used as precipitation-strengthening and arc-quenching components in silver-based electrocontact materials. The phase formation and microstructure of the resulting material were studied by electron microscopy, energy-dispersive microanalysis, and x-ray phase analysis. It was found that a dispersed structure of size 0.5 – 1.0 μm forms from the Zn2TiO4 and ZnO phases at sintering temperature 1123 K, and the samples have quite high porosity. Solid-phase reactions in the ZnO/TiO2 system at Tsint = 1123 K effect the formation of two-phase ZnO/Zn2TiO4 ceramic with zinc and tin oxide phases in residual amounts. At sintering temperature 1443 K grain growth occurs, Zn2SnO4 becomes the predominant phase, and a certain amount of zinc and tin oxide phases remains. There is no manifestations of titanium-containing phases (presumably TiO2 and Zn2TiO4), probably because of their low content.
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Translated from Steklo i Keramika, No. 12, pp. 35 – 40, December, 2022.
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Zeer, G.M., Zelenkova, E.G., Shubin, A.A. et al. Investigation of Phase Formation in Ceramic Based on Zn, Sn, and Ti Oxides. Glass Ceram 79, 507–511 (2023). https://doi.org/10.1007/s10717-023-00541-5
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DOI: https://doi.org/10.1007/s10717-023-00541-5