Fine Strontium Ferrite Powders from an Ethanol‐Based Microemulsion
作者： Jiye Fang , John Wang , Leong-Ming Gan , Ser-Choon Ng , Jun Ding
DOI: 10.1111/J.1151-2916.2000.TB01329.X
关键词: Coprecipitation 、 Strontium 、 Microemulsion 、 Coercivity 、 Hydroxide 、 Ferrite (magnet) 、 Particle size 、 Materials science 、 Chemical engineering 、 Metallurgy 、 Calcination
摘要: A fine strontium ferrite powder with high coercivity was successfully prepared by forming hydroxide precursor particles in the continuous ethanol-based phase of a microemulsion consisting iso-octane, NP9, and an ethanol solution containing Sr2+ Fe3+ cations at molar ratio 1:12. The microemulsion-derived calcined various temperatures, ranging from 600° to 1100°C, develop hexagonal phase. X-ray diffractometry infrared characterizations revealed that formation mechanisms differed those derived conventional coprecipitation. resulted finer particle size better magnetic properties than conventionally coprecipitated ferrite. exhibited intrinsic 6195 Oe saturation magnetization 58.28 emu/g when 900oC. increased further, 69.75 emu/g, 1100oC.
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