激光气相法制备超细硼粉工艺参量监测

Monitoring of the Technology Parameters in Laser Induced Synthesis of Ultra-fine Boron

用３００ＷＣＷ－ＣＯ２激光引发化学气相反应，以ＢＣｌ３和Ｈ２为原料制备超细硼粉．非接触式测温方法监测反应焰温度、反应焰模式以及反应参量对反应焰温度的影响规律．Ｈｅ—Ｎｅ激光粉体密度测定法监测粉体制备的动态过程，给出有关计算方法，并测定了粉体在反应焰中的分布状态．

The laser-driven pyrolysis of BC13/H2 system was used to produce boronultra Fme powders with laser power of 300W.Reaction flame and models,and influence of technology parameters on reaction flame were monitored by non-contact measurement of temperature.Powder density in flame was monitored by a He-Ne laser and the dynamicprocess could be detected. Calculations concerned was described, and distribution of powders in the flame was measured.