喷雾干燥结合微波煅烧氢还原法制备微米级球形钼粉  

Preparation of Spherical Molybdenum Powder by Spray Drying and Microwave Calcination Hydrogen Reduction

作　　者：赵盘巢 易伟[1] 陈家林[1] 

机构地区：[1]昆明贵金属研究所稀贵金属综合利用新技术国家重点实验室,云南昆明650000

出　　处：《稀有金属材料与工程》2017年第10期3123-3128,共6页Rare Metal Materials and Engineering

基　　金：云南省科技计划项目-重点新产品(2016BA001);云南省引进海外高层次人才项目(13020149)

摘　　要：以仲钼酸铵(优级纯)为原料,通过气流式雾化干燥结合微波煅烧氢还原法制备出微米级球形钼粉。重点研究雾化造粒过程和微波煅烧氢还原阶段的升温速率对最终Mo粉的形貌、粒度以及比表面积的影响及规律。结果表明,控制一定的工艺参数可以制备出微米级球形、分散性好的钼酸铵前驱体粉末。微波煅烧氢还原的升温速率越低,制备的Mo粉破碎越严重,且有少量团聚现象。升温速率越高,制备的Mo粉球形度越高,分散性越好。升温速率也直接影响平均粒度和比表面积,升温速率越低,平均粒度越小,而比表面积越大;升温速率越高,平均粒度相应越大,比表面越小。The spherical molybdenum powder with micron size was prepared by spray drying combined with microwave calcinations hydrogen reduction, using ammonium paramolybdate（GR pure） as raw material. The effect of spray drying and heating rate of microwave calcination hydrogen reduction on the surface morphology, particle size and specific surface area of the final Mo powder was studied. Results show that the spherical Mo precursor powder of micron size and good dispersion is prepared by controlling parameters. When the heating rate is low, the Mo powder is broken more serious with a small amount of aggregation. The Mo powder with higher degree of sphericity and good dispersion is prepared, when the heating rate is higher. The heating rate also directly affects the average particle size and specific surface area. The lower the heating rate is, the smaller the average particle size is, and the larger the specific surface area is, and vice versa.

关 键 词：仲钼酸铵 钼粉 雾化干燥 升温速率 

分 类 号：TG146.412[一般工业技术—材料科学与工程]