Abstract
Physical and electrical properties of Pb(SnaSb1-a)O3 ceramics are described. Pb(Sr Sbt1-a)O3 compound has a cubic pyrochlore type structure represented by the formula Pb2Sn2aSb2-2aO7-a (1/8<a<2/3). The relative intensity of X-ray diffraction lines fitted well with the calculated one when the crystal structure of Pb(SnaSb1-a)O3 was assumed to have the pyrochlore type structure.The ceramics formed under the hot pressing condition had high density and its microstructure was composed of a mixture of fine grains (1-2μ) and coarse grains (-10μ).Electrical resistivity of a hot pressed sample (a= 1/2) greatly changed its original value after annealing in oxygen gas.
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