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Barium hexaferrites BaFe12O19 with Bi2O3/CuO additives were synthesized by the conventional oxide ceramic process. The results manifest that Bi2O3 additives mainly concentrate on the grain boundary regions, while CuO additives could both enter into the grain and segregate at the grain boundary regions. The appropriate sintering temperature of barium hexaferrites with Bi2O3 and Bi2O3 + CuO additives...
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