摘要:
通过球磨时间控制，探究球磨时间对微细铜粉粒度分布规律和粉体形貌影响，确定适宜球磨时间参数。结果表明，球磨时间在20 h前，铜粉随着球磨时间增加，粒度分布指标持续下降，此时铜粉团聚不明显。此后，随着球磨时间增加，球磨铜粉团聚明显，球磨铜粉均匀性降低。综合分析，当球磨时间设定为20 h，球磨铜粉粒度分布、物相分析和外观形貌情况最佳，此时，球磨铜粉均匀性提高，粉体表面相对平整，径距Dδ达到最小值1.723，比表面积为0.796 m2.g-1，中位径D（0.50）为9.97 μm。
关键词:
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球磨时间 /
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微细铜粉 /
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粒度分布 /
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形貌
Abstract:
Through the control of ball milling time, the influence of ball milling time on the particle size distribution and powder morphology of fine copper powder was investigated, and the suitable ball milling time parameters were determined. The results show that before the ball milling time is 20 h, the particle size distribution index of copper powder continues to decrease with the increase of ball milling time, and the agglomeration of copper powder is not obvious. After that, with the increase of ball milling time, the agglomeration of ball milled copper powder was obvious, and the uniformity of ball milled copper powder decreased. Comprehensive analysis, when the ball milling time is set to 20 h, the particle size distribution, phase analysis and appearance of the ball milled copper powder are the best. At this time, the uniformity of the ball milled copper powder is improved, the surface of the powder is relatively flat, the diameter distance Dδ reaches the minimum value of 1.723, the specific surface area is 0.796 m2.g-1, and the median diameter D ( 0.50 ) is 9.97 μm.
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