Reactions in the system PbO-Ta2O5

Subbarao, E. C. (1961) Reactions in the system PbO-Ta2O5 Journal of the American Ceramic Society, 44 (2). pp. 92-95. ISSN 0002-7820

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Subsolidus phase relations in the binary system PbO-Ta2O5 were investigated by the quenching method. The following compounds were identified by X-ray diffraction patterns: PbO -2Ta2O5, PbO Ta2O6, 3PbO 2Ta2P5, 2PbO Ta2O6, 5PbO -2Ta2O5, and 3PbOTa2O5 The 1:1 compound has rhombohedral symmetry when it is prepared below 1150° C. Above this temperature, it yields an orthorhombic phase. Compounds with the same ratio of lead oxide to pentoxide exist in the systems PbO-Ta2O6and PbO-Nb2O5.

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