采用Ｈ２＋Ｈ２Ｏ还原法，通过控制Ｈ２Ｏ／Ｈ２比可改善粉体晶粒链状结构的晶间界面结构，采用ＸＲＤ、ＴＥＭ、ＶＳＭ等方法测试粉体的晶体结构、粒子形貌和磁性能．结果为金属磁粉的矫顽力提高；粒子形状均匀，表面平滑，毛刺少；４６０℃时Ｈ２＋Ｈ２Ｏ还原金属磁粉的矫顽力为１５２０Ｏｅ，比传统氢还原工艺矫顽力１４４０Ｏｅ提高５．６％．采用流化床反应器，具有温度均匀，气固接触充分，可防止颗粒烧结等优点，工业应用前景广阔．
metal magnetic recording powders was prepared in fluidized bed reactor. The results of characterizing with XRD, TEM, VSM etc show that the coercivity of metal powders can be improved by
the H2+H2O reduction process. At 460℃ the coercivity of the metal powders is 1520Oe, being 5.6% higher than that of the metal
powder produced by the traditional H2 reduction process. The fluidized bed reactor is suitable for this process of industry production. It has a number of
advantages such as uniform reaction temperature, good gas-solids contacting, and freedom from sintering of the particles.
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