喷雾干燥结合微波煅烧氢还原法制备微米级球形钼粉

发布时间：2018-04-29 01:24

本文选题：仲钼酸铵 + 钼粉　；参考：《稀有金属材料与工程》2017年10期

【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。
[Abstract]:Using ammonium paramolybdate (excellent grade pure) as raw material, micron-sized spherical molybdenum powder was prepared by air-flow atomization drying combined with microwave calcination hydrogen reduction method. The effects of atomization granulation process and heating rate of microwave calcination hydrogen reduction on the morphology, particle size and specific surface area of the final Mo powder were studied. The results show that micrometer spherical and well dispersed ammonium molybdate precursor powder can be prepared by controlling certain process parameters. The lower the heating rate of reduction of hydrogen by microwave calcination, the more serious the broken Mo powder is, and a little agglomeration occurs. The higher the heating rate, the higher the spherical degree of Mo powder and the better the dispersity. The lower the heating rate is, the smaller the average particle size is and the larger the specific surface area is, and the higher the heating rate is, the larger the average particle size is and the smaller the specific surface area is.
【作者单位】：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;
【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)
【分类号】：TG146.412

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