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The solubility of bismuth oxide in barium titanate was investigated by X‐ray diffraction and scanning electron microscopy. Bismuth was added in two schemes: Ba 1‐ x Bi x TiO 3 , where only site balance was considered, and Ba 1‐1.5 y Bi y TiO 3 , where both site balance and charge balance were considered. The solubility limits of bismuth in BaTiO 3 sintered samples for these two schemes are slightly different, 3 and 5 at.%, respectively, at 1250°C.
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Zhou et al. (1999) studied this question.
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