Abstract
Nanosize (< 50 nm) barium hexaferrite (BaFe12O19) has been prepared by solution combustion method using ferric nitrate, barium nitrate and hydrazine based fuels like oxalyl dihydrazide (ODH), malonic acid dihydrazide (MDH) and maleic hydrazide (MH). The formation of BaFe12O19, has been confirmed by its characteristic powder X-ray diffraction pattern. The nanosize nature of BaFe12O19 particles has been determined from X-ray line broadening, Mossbauer spectrum, BET surface area measurements and Transmission Electron Micrographs (TEM). The variation of magnetic properties of the powders with sintering temperature and particle size has been investigated. The Hc and Ms values are in the range of 500–1600 Oe and 25–45 emu/gm respectively. Microstructures of the sintered specimens show grain size in the range of 2–6 μm.
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