Pembuatan dan Karakterisasi Ferit Heksagonal BaFe₁₂O₁₉

Marsongkohadi, M. Daveny Soufian, Si Kusmanto, Kumiadi Sumaamidjaya & Achmad Arslan

Polycrystalline hexagonal ferrites BaFe₁₂O₁₉ have been prepared by standard processes of ceramics. Pure BaC0₃ and Fe₂O₃ powders of non-stoichiometric compositions Ba . n Fe₂0₃ (n = 5.5, 5.7.and 5.9) were ball-milled and calcined for several hours. Addition of 0.5% NaF flux reduced the calcining temperature by 150⁰C-200⁰C thus enabling the formation of hexagonal ferrite at 900⁰C instead of 110⁰­C - 1200⁰C. Magnetically aligned specimens were characterized by X-ray diffraction using M_oKα radiation. These specimens were also examined by neutron diffraction with λ = 1.071 A and standard magnetic measurements. All the present results were compared with those obtained from the BaFe₁₂O₁₉ specimens manufactured by Sumitomo, Co, Japan. The results clearly showed that the present made ferrites had crystal structures and magnetic properties fairly similar to those specimens manufactured by Sumitomo, Co and thus enabling them to be used as permanent magnet material.

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