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本文以还原铁粉、NiO、ZnO及Fe2O3为原料,利用自蔓延高温合成(SHS)法制备NiZnFe2O4预烧料,并且利用XRD图谱,Vegard定律等分析了产物结构。分析结果表明:SHS法可以制备纯度很高的NiZnFe2O4预烧料。试验发现,保温时间及粉料压坯密度均对SHS法制备的NiZnFe2O4预烧料的结构有一定的影响:随着保温时间的延长,产物的纯度提高,同时固溶体中的组元配比更接近配方比例;当粉料压坯相对密度为63%左右时,固溶体中的组元配比可达到配方比例。
In this paper, NiZnFe2O4 calcined material was prepared by SHS method using reduced iron powder, NiO, ZnO and Fe2O3 as raw materials, and the product structure was analyzed by XRD and Vegard’s law. The results show that SHS method can prepare high purity NiZnFe2O4 calcined material. It was found that the holding time and the density of green compacts all had an impact on the structure of NiZnFe2O4 calcined material prepared by SHS method. The purity of the product increased with the increase of holding time, and the ratio of the components in the solid solution was closer Formula proportion; when the relative density of powder compacts is about 63%, the proportion of components in the solid solution can reach the formula ratio.