采用不同费氏粒度的钨粉通过相同的等静压、烧结工艺制备成厚钨板坯，研究了钨粉粒度及粒度分布与烧结钨板坯致密度的对应关系。马尔文激光粒度分布采集方案：将粉末样品充分混合，取800ml～1000ml去离子水注入大烧杯，启动样品循环系统，进行电子背景测量、光学背景测量和对光。搅拌器的转数2500r/min～2800r/min，遮光度值处于7%～14%范围之内。待样品混合均匀后，开始测量并分析数据，直至结果趋于稳定，读取结果。SEM采集方案：将粉末样品洒在导电胶带，将样品放进样品室中抽真空，调整相应的工作距离光斑和工作电压，把标样的标记线调到荧光屏的中心，聚焦后照相。密度采集方案：试样先在空气中称重，然后在液体中称重，通过计算得出密度。

Thick tungsten slabs are prepared by using tungsten powders of different Fischer particle sizes through the same isostatic pressing and sintering process. The relationship between the particle size and particle size distribution of tungsten powders and the density of sintered tungsten slabs is studied. Malvern laser particle size distribution collection program: Mix the powder samples thoroughly, pour 800ml～1000ml deionized water into a large beaker, start the sample circulation system, perform electronic background measurement, optical background measurement and beam alignment. The speed of the stirrer is 2500r/min～2800r/min, and the shading value is within the range of 7%～14%. After the sample is uniformly mixed, start to measure and analyze the data until the result becomes stable, and then read the result. SEM collection scheme: Sprinkle the powder sample on the conductive tape, put the sample into the sample chamber and vacuum, adjust the corresponding working distance spot and working voltage, adjust the mark line of the standard sample to the center of the fluorescent screen, and take a picture after focusing. Density collection scheme: The sample is first weighed in the air, then in the liquid, and the density is calculated.