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بین المللی علوم (منتشر نمی شود) | ||
مقاله 4، دوره 5، شماره 0 - شماره پیاپی 1373، آبان 1383 اصل مقاله (283.01 K) | ||
نویسندگان | ||
A. Badiei؛ S. A. Seyyed Ebrahimi؛ S. Alamolhoda* | ||
عنوان مقاله [English] | ||
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چکیده [English] | ||
A novel sol-gel auto-combustion method has been used to synthesize ultra-fine particles of strontium hexaferrite. The gels were prepared from metal nitrates and citric acid by various molar ratios of Fe/Sr and trimethylamine as pH adjusting agent. The results showed that the gel exhibits a self-propagating behavior after ignition in air. The combustion product was calcined at 800 °C to form strontium hexaferrite. The obtained powders were characterized by XRD, SEM and FTIR techniques. The optimum molar ratio was Fe/Sr=10 with crystallite size about 37 nm. The FTIR and XRD results showed that the combustion product contains ? -Fe2O3 as the main phase and some amount of SrCO3 and ? -Fe2O3 | ||
کلیدواژهها [English] | ||
Combustion, FTIR, Sol-gel, Strontium Hexaferrite, trimethylamine, XRD | ||
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