CH_(4)还原氮化V_(2)O_(3)制备VN  

Preparation of VN by reduction nitriding V_(2)O_(3)with CH_(4)

作　　者：夏三元 姜涛 陈泊键 温婧 杨广东 刘孟霞 Xia Sanyuan;Jiang Tao;Chen Bojian;Wen Jing;Yang Guangdong;Liu Mengxia(School of Metallurgy,Northeastern University,Shenyang 110819,Liaoning,China)

机构地区：[1]东北大学冶金学院,辽宁沈阳110819

出　　处：《钢铁钒钛》2024年第5期17-25,共9页Iron Steel Vanadium Titanium

基　　金：国家自然科学基金项目(52174277,52374300,52204309)。

摘　　要：通过热力学计算和试验工艺结合的方式,探究了利用CH_(4)作为还原剂碳热还原、氮化制备VN的工艺条件以及反应过程。结果表明:在CH_(4)流量0.1 L/min、1150℃保温2 h并继续渗氮2 h的条件下,成功合成了氮、碳含量分别为14.2%、3.35%的VN产物,符合国家VN16(GB/T 20567-2020)氮化钒产品标准。反应过程中的物相转变过程为V_(2)O_(3)→V_(8)C_(7)→VN,并且CH_(4)在高温条件下分解产生的高活性炭与H_(2)均有利于碳化反应的进行,能有效提高反应速率。In this paper,the process conditions and reaction process of using CH_(4)instead of traditional carbon thermal reduction to prepare VN is explored by combining thermodynamic calculation and experimental process exploration.The results showed that the VN products with nitrogen and carbon contents of 14.2%and 3.35%were successfully synthesized under the conditions of CH_(4)flow rate of 0.1 L/min,heating at 1150℃for 2 h and continuous nitriding for 2 h,which met the national standard of VN16(GB/T 20567-2020)for vanadium nitride product.The phase transition process during the reaction is V_(2)O_(3)→V_(8)C_(7)→VN,and the high activated carbon and hydrogen produced by methane decomposition at high temperature are beneficial to the carbonization reaction and effectively improve the reaction rate.

关 键 词：氮化钒 三氧化二钒 甲烷 还原氮化 物相转变 

分 类 号：TF841.3[冶金工程—有色金属冶金]