摘要
通过IR、TGA/DTA、XRD、SEM等分析手段,研究纤维状镍粉前驱体粉末的热分解过程,对分解产物的组成及形貌进行表征。结果表明,前驱体的形貌是影响热分解产物镍粉形貌的决定性因素。低温区分解得到的粉末较粗且大部分粒子形状不规则,480℃以上分解得到的粉末团聚程度非常高。400℃下分解30min得到的镍粉纤维状明显且分散性较好,随着分解时间的延长,金属粉末粒子之间团聚加重。最佳工艺条件下制得的镍粉呈毛线般纤维状,其构成粒子粒径小于50nm。
The precursor thermal decomposition process of fibrillar nanometer scale nickel powder is investigated, and the composition and morphology of the products are characterized by use of IR, TGA/DTA, XRD and SEM. The results show that the precursor morphology is a decisive factor to the product morphology of the nickel powder. The morphology of the product derived at low decomposing temperature is irregular. The nickel powders produced at the temperature higher than 480℃ coheres seriously. Under 400℃, 30min is adequate thermal decomposition time, the product particles are reunited with the decomposition time prolonging. The powder prepared under the optimal condition is fibrillar like woolen yarn, the grain diameter is less than 50nm.
出处
《有色金属》
CSCD
2003年第4期24-27,共4页
Nonferrous Metals
基金
高等学校博士学科点专项科研基金
关键词
镍粉
制备
前驱体
热分解
纤维状
纳米粉
metallic material
nickel powder
thermal decomposition
precursor
fibrillar powder
nanometerscale
