采用费氏粒度分别为2.3、3.3、5.4μm的钼粉，利用相同等静压成形、烧结工艺得到烧结钼棒，对烧结钼棒取样进行金相、密度、硬度测试，对粉末进行马尔文激光粒度分布测试和SEM观察。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。金相组织采集方案：试样经过机械磨削和抛光成平整、光亮、无磨痕或抛光划痕的镜面，采用10-20%的氢氧化钠+铁氰化钾混合液（氢氧化钠与铁氰化钾质量比为1:1）对样品进行腐蚀，腐蚀后的样品在金相显微镜下放大100×或200×进行金相组织观察。显微硬度采集方案：试样经过机械磨削和抛光成平整、光亮、无划痕的镜面，然后水平稳固地放在刚性支承台上，在没有冲击或振动的情况下，把压头垂直压入试样的被测表面，直到施加的试验力达到规定的数值为止，施加试验力的时间为2s～8s，试验力保持时间为10s～15s。

Molybdenum powders with Fischer particle sizes of 2.3, 3.3, 5.4μm were used to obtain sintered molybdenum rods by the same isostatic pressing and sintering process. The sintered molybdenum rods were sampled for metallographic, density, and hardness tests, and the powders were subjected to Malvern laser Particle size distribution test and SEM observation. 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 phosphor 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. Metallographic structure collection plan: The sample is mechanically ground and polished into a smooth, bright, and non-abrasive or polished mirror surface, using a 10-20% sodium hydroxide + potassium ferricyanide mixture (sodium hydroxide and potassium ferricyanide) The mass ratio of potassium ferricyanide is 1:1) The sample is corroded, and the corroded sample is magnified 100× or 200× under a metallurgical microscope to observe the metallographic structure. Micro-hardness collection scheme: The sample is mechanically ground and polished into a smooth, bright, and non-scratched mirror surface, and then placed on a rigid support table horizontally and firmly, and the indenter is pressed vertically without impact or vibration. Insert the tested surface of the sample until the applied test force reaches the specified value. The time for applying the test force is 2s to 8s, and the test force retention time is 10s to 15s.