Abstract

The agglomeration behaviour of Mo powder, especially fine Mo powder, has been a major concern. The degree of powder agglomeration is directly related to the uniformity of Mo and its alloy powder mixtures and related target materials. This study mainly focuses on how to efficiently reduce the soft agglomerates behaviour of Mo powder. Analysis of the micromorphology and median particle size (D₅₀) of modified Mo powder showed that the soft agglomerates behaviour of Mo powder can be divided into three stages: drawing, gathering, and sticking. Modification of the Mo powder surface by the polymer surfactant PVP-K30 can effectively prevent the agglomeration of the Mo powder. Additionally, the surface hydroxyl groups of the Mo powder disappeared, the agglomerate factor decreased from 13.02 to 5.04, and the flowability of the Mo powder was significantly improved. This is important for improving the grain uniformity and application performance of Mo target materials synthesized from Mo powder.

Graphic abstract

中文翻译：

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表面改性钼粉团聚行为的研究

摘要

钼粉，尤其是细钼粉的团聚行为一直是人们关注的主要问题。粉末团聚的程度直接关系到钼及其合金粉末混合物及相关靶材的均匀性。本研究主要集中于如何有效降低钼粉的软团聚行为。微形态和中值粒径分析 (D ₅₀)的改性钼粉表明，钼粉的软团聚行为可分为三个阶段：拉拔、聚集和粘连。高分子表面活性剂PVP-K30对Mo粉表面进行改性，可有效防止Mo粉团聚。此外，Mo粉表面羟基消失，团聚因子从13.02降低到5.04，Mo粉的流动性显着提高。这对于提高由钼粉合成的钼靶材的晶粒均匀性和应用性能具有重要意义。

图形摘要