| 摘要 |
<p>The present invention relates to a process and equipment for preparing superfine powder by heating and evaporation. Under the condition of inertial atmosphere or reactive atmosphere, the metal or alloy is heated by use of induction, resistance or arc while high-power CO2 gas laser or YAG solid laser acts directly on the metal or alloy to speed up its fusion and evaporation. A high gradient of pressure and temp is generated near the surface of the metal or alloy to speed up the evaporation of molten metal and alloy, resulting in higher output rate of superfine powder. In the equipment for preparing superfine powder a heat-vacuum evaporation chamber provided with specially designed laser and heat means is used.</p> |
