Effect of the Addition of α-Si3N4 on the Direct Nitridation of Silicon Powder at Atmospheric Pressure

摘要: Effect of the addition α-Si3N4 on nitridation silicon powder was studied at 1550 and atmospheric pressure. Silicon 2.2μm in size 99.99% purity adopted as experimental materials, 99% used diluent, nitrogen 99.9993% reaction gas. The morphologies phase compositions products were analyzed by SEM XRD respectively. results show that conversion is improved considerably increasing adding proportion diluent. When increases from 10% to 50%, 38% 92.55%. content β-Si3N4 product decreases, after an initial increase, with increases, it reaches peak point when 30%. sinterability nitride decreases β so should be kept away