The influence of the coprecipitation conditions on the low-temperature formation of barium hexaferrite |
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Authors: | Darja Lisjak Miha Drofenik |
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Affiliation: | (1) Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia |
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Abstract: | We have investigated the formation of barium hexaferrite via the coprecipitation method. Various reagent salts and solvents
were tested, and the coprecipitates were calcined at 300–800 °C for 1–50 h. The samples were characterized with X-ray powder
diffraction, electron microscopy and magnetometry. The coprecipitation conditions had a significant influence on the formation
time of the barium hexaferrite, which started to form at as low as 500 °C. The optimum coprecipitation conditions were: ethanol
as a solvent and chlorides as reagent salts. Powders with optimum magnetic properties, saturation magnetization 60–63 emu/g
and coercivity 4–5 kOe, were obtained by calcining at 600–700 °C. |
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