熔盐法制备的锶铁氧体磁粉的形貌、结构及磁性

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用熔盐法制备了锶铁氧体(SrM)磁粉,改变盐的种类及组成、预烧温度瓦及保温时间,可以很容易地控制SrM磁粉的粒子大小及分布、形貌、结构和磁性。实验表明,用BaCl2及K2SO4作助熔剂时,可以制备出磁性很好的亚微米SrM磁粉-粒子尺寸0.3~0.5μm,σ16=74.4~79.3μWb·m/kg(σ16为Hm=1273kA/m时的磁化强度),HCJ=414~329kA/m。而用KCl及NaBO2·4H2O作助熔剂时,可以制备粒径均匀、直径厚度比(D/t)很大的扁平状六角形SrM磁粉。这
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