直流电弧等离子体制备纳米粉技术及其应用

直流电弧等离子体是在电场作用下，气体中存在的自由电子受到电场加速，其速度（动能）达到某一值时，中性原子或分子被电离而获得更多的自由电子，这些电子进一步加速激发其它中性粒子产生类似于雪崩现象的电离过程，结果使气体放电形成等离子体。利用等离子体的高温（可达3000K-30000K）使金属熔化蒸发形成气态金属原子，再将气态金...

Preparation of nano powder by DC arc plasma technology and applications

DC arc plasma is in the electric field,free electrons present in the gas by the electric field acceleration,its velocity(kinetic energy) reaches a certain value,the neutral atoms or molecules are ionized and get more free electrons,to further accelerate these electrons stimulate other neutral particles similar to the phenomenon of avalanche ionization process,resulting in the formation of gas-discharge plasma.By use of high-temperature plasma(up to 3000K-30000K) to melt metal and evaporate to form gaseous metal atoms,and then cooled gaseous metal atoms to form nano metal powder.This article describes the preparation of nano powder DC arc plasma equipment systems construction,analysis of Ar,H2,N2,etc.,as the plasma gas properties and role,and describes the DC arc plasma technology application fields.The introduction of the unit’s DC arc plasma equipment and look forward to its non-ferrous metal processing in Guangxi’s application prospect.