氨氢比对Fe_4N陶瓷粉体合成的影响  

EFFECT OF NH_3/H_2 RATIO ON THE SYNTHESIS OF Fe_4N CERAMIC POWDER

作　　者：任国强[1] 王群[1] 瞿志学[1] 汤云晖[1] 

机构地区：[1]北京工业大学材料科学与工程学院,北京100124

出　　处：《硅酸盐学报》2010年第12期2284-2288,共5页Journal of The Chinese Ceramic Society

基　　金：国家高技术研究发展计划(2007AA06Z320)资助项目

摘　　要：从热力学计算和实验两方面研究气氛对固-气反应法制备Fe4N陶瓷粉体的影响。结果表明:通过调控体积比V(NH3)/V(H2)可以在较宽的温度范围内合成纯相的Fe4N粉体,其中,V(NH3)/V(H2)=1:1时,能够得到纯相Fe4N粉体的温度范围最大,约为500～700℃,而随着氨氢比增大/减小,该温度相应降低/升高,并且温度范围不断减小直至消失。Effect of volume ratio V（NH3）/V（H2） on the solid-gas reaction synthesis of Fe4N was investigated by the thermodynamic calculation and experimental validation.The results show that pure Fe4N can be synthesized by controlling V（NH3）/V（H2） within a wide temperature range.And when V（NH3）/V（H2） = 1：1,the reaction temperature has the largest range of about 500-700 ℃.Moreover,as V（NH3）/V（H2） increases/decreases,the temperature decreases/increases simultaneously followed by the continuous decrease of temperature range until the temperature reaches zero.

关 键 词：氮化铁 固-气反应 热力学计算 氨氢比 

分 类 号：TQ174.756[化学工程—陶瓷工业]