Abstract
In the present work, fine barium ferrite powder has been synthesized through a one-step hydrothermal process in an autoclave at [OH −]/[Cl −] ratio of 2:1 in the temperature range from 180 to 260 °C using barium chloride (BaCl 2), ferrous chloride (FeCl 2) and potassium nitrate (KNO 3) as the starting materials. Both particle size and saturation magnetization ( M s) increase with increasing hydrothermal reaction temperature, while the intrinsic coercivity ( iH c) peaks at 685 Oe at 230 °C. Morphology progress from the barium ferrite precursor particles to the barium hexaferrite particles has been monitored with increasing hydrothermal reaction time at 230 °C in the autoclave.
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