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采用气流磨对钨粉进行分散分级处理。研究发现,经气流磨处理后,钨粉的粒度分布变窄,比表面积增加,d10、d50、d90分别由处理前的2.02,4.43,9.95μm变为1.79,3.02,5.54μm,比表面积由1.754m2/g增大到2.569m2/g;通过扫描电镜分析发现,原有粉末的团聚现象基本消除,钨粉颗粒变成规则的近球形,分散性能良好;XRD分析表明,处理过程中无杂质新相生成。另外,处理参数对粉末性能有影响,而多次处理会获得粒度更加均匀、形貌更规则、分散性能更好的钨粉。
Tungsten powder was dispersed and classified by air jet mill. The results showed that the particle size distribution of tungsten powder narrowed and the specific surface area increased after airflow milling. The d10, d50 and d90 changed from 2.02, 4.43 and 9.95 μm to 1.79, 3.02 and 5.54 μm, respectively, and the specific surface area increased from 1.754 m2 / g increased to 2.569m2 / g. The results of scanning electron microscopy showed that the agglomeration of the original powder was basically eliminated and the tungsten powder particles became a regular near spherical shape with good dispersibility. XRD analysis showed that there was no impurity in the treatment Phase generation. In addition, the processing parameters have an influence on the properties of the powder, and the multiple treatments will result in tungsten powder with more uniform grain size, more regular morphology and better dispersion performance.