【摘要】 采用超临界流体干燥法（ＳＣＦＤ）合成出了ＭｎＺｎ铁氧体超细粉末，并且与水热法和共沉淀法作了比较。利用Ｘ射线衍射（ＸＲＤ），透射电子显微镜（ＴＥＭ）以及振动样品磁强计（ＶＳＭ）等先进仪器对超细铁氧体粉末进行了表征。结果表明：在超临界状态（２６０℃，８．０ＭＰａ）下能够合成出结晶良好的立方尖晶石结构的ＭｎＺｎ铁氧体超细粉末，其磁性能明显要高于由水热法和共沉淀法制得的粉末的磁性能。更多还原

【Abstract】 The ultrafines of MnZn ferrite was prepared by supercritical fluid drying(SCFD),and which was compared with the hydrothermal method and coprecipitation method.The ultrafines of MnZn ferrite was investigated by X ray diffraction(XRD),transmission electron microscopy(TEM) x and vibrating specimen magnetometer,etc.The results indicated that the well crystallized cubic spinel structure of ultrafines of MnZn ferrite could be synthesized at the supercritical state(260℃,8.0MPa),and the magnetic properties were remarkable better than those obtained by hydrothermal method and coprecipitation method.更多还原