纳米锰锌铁氧体的制备与结构特性

Synthesis and structural properties of nano-crystalline Mn-Zn ferrites

摘要: 采用化学沉淀的高纯氧化铁有效地制备出了MnZn铁氧体——Zn_xMn_1-xFe₂O₄(x=0.2~0.4),利用XRD、SEM等手段分析和表征了MnZn铁氧体样品的结构.研究结果表明,纳米晶MnZn铁氧体的制备过程分两个阶段,即先生成Zn-Mn₂O₄,最后在烧结过程中生成Zn_0.2Mn_0.8Fe₂O₄锰锌铁氧体.探讨了在此工艺条件下MnZn铁氧体晶体的生长机理.

Abstract: Nano-crystalline MnZn ferrites, Zn_xMn_1-xFe₂O4(x=0.2-0.4), were produced by the high energy milling method with high pure iron oxide prepared by chemical precipitation process as the starting material. Their structural properties were analyzed and characterized by means of X-ray diffractometer (XRD) and scanning electron microscopy (SEM). The results showed that forma-tion of the nano-crystalline MnZn ferrites had two stages; the phase of ZnMn₂0₄ grew in the presintering first and then turned into Zn_0.2Mn_0.8Fe₂O₄ during the sintering process. The crystal growth mechanism was compendiously discussed.