M型锶铁氧体中空纤维的制备和表征

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以柠檬酸和金属盐为原料,采用有机凝胶先驱体转化法制备了M型锶铁氧体(SrFe12O19)中空纤维.通过FTIR、TG/DSC、XRD、SEM和VSM等技术对所得纤维进行了表征.结果表明,凝胶的可纺性与其化学组成和pH值有关,当柠檬酸与金属离子的摩尔比为1.5∶1.0,pH=4.2左右时,凝胶的可纺性最好.经1100℃焙烧后,制备的M型锶铁氧体中空纤维具有较大的长径比,直径可小于1μm,中空孔径约为纤维直径的一半,组成纤维的晶粒形貌为六角片状,晶粒尺寸为236nm,在室温下的饱和磁化强度为53.5A
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