H2+H2O还原法制备超细金属磁记录粉

无机材料学报

H₂+H₂O还原法制备超细金属磁记录粉

王其祥; 宋宝珍; 李洪钟

中国科学院化工冶金研究所北京 100080

收稿日期:2000-08-18 修回日期:2000-10-30 出版日期:2001-09-20 网络出版日期:2001-09-20

Ultrafine Metal Magnetic Recording Powders Produced by the H₂+H₂O Reduction Process

WANG Qi-Xiang; SONG Bao-Zhen; LI Hong-Zhong

Instittue of Chemical Metallurgy; Chinese Academy of Science; Beijing 100080; China

Received:2000-08-18 Revised:2000-10-30 Published:2001-09-20 Online:2001-09-20

摘要/Abstract

摘要： 采用Ｈ_２＋Ｈ_２Ｏ还原法，通过控制Ｈ_２Ｏ／Ｈ_２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Ｈ_２＋Ｈ_２Ｏ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．

关键词: 金属磁记录粉, H₂/H₂O还原, 晶粒链状结构

Abstract: 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.

Key words: metal magnetic recording powders；α-Fe；H₂+H₂O reduction process

中图分类号:

TF123

王其祥,宋宝珍,李洪钟. H₂+H₂O还原法制备超细金属磁记录粉[J]. 无机材料学报.

WANG Qi-Xiang,SONG Bao-Zhen,LI Hong-Zhong. Ultrafine Metal Magnetic Recording Powders Produced by the H₂+H₂O Reduction Process[J]. Journal of Inorganic Materials.

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H₂+H₂O还原法制备超细金属磁记录粉

Ultrafine Metal Magnetic Recording Powders Produced by the H₂+H₂O Reduction Process

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