| 摘要 |
PURPOSE: To produce molybdenum metal powder having coating substantially consisting of MoO2 and having a defined oxygen content by subjecting molybdenum metal powder to heat treatment at a relatively low specified temp. in an atmosphere of CO2 and partially oxidizing it. CONSTITUTION: Molybdenum metal powder is subjected to heat treatment at <1,200 deg.C and is partially oxidized. In this way, the molybdenum metal powder having molybdenum oxide coating substantially consisting of MoO2 is obtd. The grain size of the molybdenum metal powder is preferably regulated to about 5 to 90μm, and the thickness of the MoO3 oxide coating is preferably regulated to about 0.1 to 20μm. The oxygen content in the molybdenum metal powder thus obtd. can be defined to the range of about 1 to 18 wt.%. This oxygen content can be set by selecting the reaction time, reaction temp., CO2 , concn. or the like. The MoO2 coating is uniformly and tightly stuck, and the molybdenum metal powder having this is suitable for the raw material in a flame or plasma atomizing method. |
