本文以不锈钢氧化皮酸洗废渣为原料,采用碱热氧化法制备尖晶石结构铁氧体磁性材料,研究各工艺参数对铁氧体显微组织和磁性能的影响.研究表明:NaOH浓度的升高和H2O2滴加量的增加,尖晶石铁氧体晶体结构中的Cr离子含量逐渐减少,而Fe离子含量呈单调增加.废渣经处理后,其颗粒尺寸逐渐减小.在160℃,用1100g/L NaOH和120ml H2O2的混合溶液对废渣进行处理,所得铁氧体的磁性能可达到:饱和磁化强度Ms为12.07 emu/g,剩磁Mr为2.37 emu/g和矫顽力Hc为199.99 Oe.
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