含水量对喷雾干燥钼粉性能的影响

将钼粉末和聚乙烯醇（PVA）水溶液按一定比例配置悬浮浆料，经喷雾造粒后进行连续自动压制成型，研究了不同含水量对喷雾干燥钼粉松装密度、流动性和成型性的影响。结果表明：随着含水量的增加，喷雾干燥钼粉松装密度减小，流动性变差；在自动压制成型过程中，随着含水量的增加，填充密度、成型压力降低，压制回弹减小，水含量为0．08％～0．16％（质量分数）时压制效果较为理想。

EFFECT OF WATER CONTENT ON PROPERTIES OF MOLYBDENUM SPRAY- DRIED POWDERS

After a uniform mixture of molybdenum powder and aqueous polyvinyl alcohol （PVA） in a certain pro- portion has been prepared, the mixture was spray dryed, and the green body was mold pressed. The effects of the water content of the spray drying molybdenum powder on its characteristics was investigated, and the formability of the powder was investigated as well. The results show that with the increasing of the water content of the spray dr- ying powder, the apparent density of it decreases and the fliuidity of it become worse ; and during mold pressing, the molding pressure reduces, the strength of green body increased with the water content of the powder increases. And appropriate water content of the spray drying molybdenum powder for mold pressing is 0. 08 wt% to 0.16 wt%.