二水草酸镍在氩气中的热分解过程  

Process of pyrolytic decomposition of NiC_2O_4·2H_2O in argon gas

作　　者：傅小明[1] 刘照文[1] 范钧[1] 

机构地区：[1]宿迁学院三系,江苏宿迁223800

出　　处：《化学工程》2010年第10期232-234,共3页Chemical Engineering(China)

基　　金：宿迁学院高级人才启动基金项目(SQCGJ2010002)

摘　　要：通过TG-DSC、SEM和激光粒度分析仪对二水草酸镍在氩气中热分解过程进行分析,研究结果表明:二水草酸镍在氩气中的热分解过程经历了2个阶段,首先,200—300℃时二水草酸镍失去结晶水;其次,325—425℃时N iC2O4被热分解为金属镍粉。与此同时,二水草酸镍在氩气中热分解制备金属镍粉过程中,在254.4—407.5℃时,二水草酸镍在氩气中热分解产物的粒径变化最大;407.5—450.0℃时,二水草酸镍在氩气中热分解产物的粒径变化次之。因此,为了制备出超细的金属镍粉,可以分段性地控制二水草酸镍在氩气中的热分解条件。The pyrolysates of NiC2O4·2H2O in argon gas were investigated by TG-DSC,SEM and laser granulometry.The results show that there are two stages in the process of the pyrolytic decomposition of NiC2O4·2H2O in argon gas.Firstly,the crystal water in NiC2O4·2H2O is lost at 200—300 ℃;secondly,NiC2O4 is pyrolysized into nickel powder at 325—425 ℃.At the same time,the influence of temperature on the particle size of the decomposition is more at 254.4—407.5 ℃.The influence of temperature on the particle size of the decomposition is less at 407.5—450.0 ℃.Therefore,the pyrolytic conditions of NiC2O4·2H2O in argon gas can be controlled to obtain ultra-fine nickel powder.

关 键 词：二水草酸镍 热分解 热重差热 粒径分布 镍粉 

分 类 号：TF123.122[冶金工程—粉末冶金]