湿法机械球磨制备片状镍粉研究  

Preparation of Nickel Flake Particles by Ball Milling in Liquid Environment

作　　者：肖骁[1] 潘炳[1] 曾子高[2] 肖松文[2] 

机构地区：[1]中南大学冶金科学与工程学院,湖南长沙410083 [2]长沙矿冶研究院,湖南长沙410012

出　　处：《中国粉体技术》2007年第3期1-3,10,共4页China Powder Science and Technology

基　　金：国家自然科学基金重点项目资助;编号:50434010

摘　　要：以类球形镍粉为原料,进行了湿法机械球磨制备片状镍粉的试验,考察了乙醇体积、球料比、球磨转速、球磨时间及助剂用量等因素对镍粉形貌的影响,采用XRD、SEM等对镍粉结构形貌进行了表征分析,确定了最佳工艺条件:乙醇体积60mL、球料比30:1、球磨转速450r/min、球磨时间3.5h、助剂A用量2%。在该条件下,得到的片状镍粉径厚比89,表面光滑平整,碎片粘附少,具有良好的金属光泽;其微观结构表明,球磨过程中,镍粉的微观内应力逐渐增加,晶粒不断细化;而且产品的片状化程度与<200>择优取向度有关。The wet process of preparation for nickel flake powder was studied. The effect of the mass ratio of ball to raw materials, rotation speed of the ball mill, mill time, and percentage of agent used on the thick and properties of nickel flake was investigated. The structure and micro-shape of products were characterized by XRD and SEM, and the most optimum process conditions was adjusted as foilows： alcohol volume 60 mL, mass ratio of ball to raw materials 30：1, rotation speed of ball mill 450 r/min, milling time 3.5 h, percentage of agent 2%. In this condition, the nickel flake is of well metallic luster, and smooth and glazed surface, which diameter/thick value is 89, the micro-structure indicated that the micro-strain of nickel powder was gradually increased, while grain size was gradually decreased during milling process, and the flaking degree of nickel powder was related to the preferred orientation degree of〈200〉.

关 键 词：片状镍粉 机械球磨 液相环境 择优取向 

分 类 号：TF123.23[冶金工程—粉末冶金]