酸化性雰囲気におけるスピネル型フェライトのX線的研究 : 各種フェライトの基礎的並びに製造に関する研究(第1報)

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Investigations have been made on the formation of the ferrites prepared by solid-state reaction of the mixtures of the ratios 1 : 1 ZnO : Fe_2O_3,1 : 1 MnCO_3 : Fe_2O_3,1 : 1 : 2 ZnO : MnCO_3 : Fe_2O_3,fired under different schedules. X-ray diffraction patterns were obtained for the polycrystalline ferrites of spinel structure formed at various firing temperatures. It was confirmed that zinc ferrite phase was formed when the firing took place in air at below 800℃, while manganese ferrite phase appeared at 1150℃. Prefiring at the temperature of the formation of zinc-manganese ferrite (about 800℃) can be carried out in air. The final firing should be done in air at the temperatures higher than 1150℃ to promote good crystallization. The temperature should not be too high, since over-sintering leads to the too much shrinkage, bending etc., which are prohibitive for producing ferrites of exact dimensions.
社団法人日本セラミックス協会の論文
1963-01-01