【摘要】 CW CO₂激光引发化学气相热解,以BCl₃/H₂为原料体系制备超细硼粉。探讨了反应热力学及引发过程机理,测定了镜距f与火焰温度T及反应气体在激光束中停留时间τ_停的关系,IR光谱表明粉体杂质主要是H₃BO₃,XRD结果表明硼粉为无定形体,硼含量分析结果表明为88.9％（wt）,TEM观察表明硼粉为无粘连、单分散、分布窄的球形颗粒,粒度分布范围0.03～0.12μm,与热化学还原法及热管炉法硼粉相比,颗粒具有极好的分散性和均一性。更多还原

【Abstract】 The laser-driven pyrolysis of the BCl₃/H₂ to yield boron powder isdescribed. The reaction thermodynamics and initiation mechanism have been explored.The relations between lens distance（f）, flame temperature（T） and cease time(τ_ccase)beendetermined. It was proved by IR and XRD spectrum that the main impurity of the pow-der is H₃BO₃, the boron powder shows amorphous, and the content of boron is88.9%（wt）. It was also observed by TEM that the boron powder is nonadhesive, sphericaland narrow distributed, and that the size range of the powder is 0.03～0.12μm. and theparticles have excellent dispersity and homogeneity in comparison with that prepared byhot chemical reduction and hot oven reduction.更多还原