摘要
对还原氮化法制备氮化钒的过程进行了理论分析和实验探讨。结果表明,五氧化二钒还原过程中同时发生了直接还原和间接还原,在高温氮化条件下已生成的氮化钒又转化为碳化钒。本试验条件下直接还原的开始温度为656K,氮化的开始温度为1160K,氮化钒转化为碳化钒的温度为1560K。间接还原发生的可能性与配碳系数有关,配碳系数越大,其发生的可能性越大。
The theoretical analysis and experimental investigation have been taken for the reduction process of preparation VN with C and V2O5. The results show that both direct reduction and indirect reduction take place during the reduction process of V2O5, in which the VN formed with high-temperature- nitrogenization changes into VC. With the experimental conditions, the beginning reaction temperature of direct reduction is 656 K, the nitrogenization occurs at 1 160 K, and VN translates into VC at 1 560 K. The indirect reducing reaction is related to the ratio of mixture, with the increase of carbon ratio there occurs increase in possibility of reducing reaction.
出处
《钢铁钒钛》
CAS
北大核心
2003年第1期46-49,共4页
Iron Steel Vanadium Titanium
