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以特纯仲钨酸铵为原料,通过特纯仲钨酸铵在氩气中煅烧获得蓝钨,此蓝钨在纯度为99.99%、露点小于-40℃的氢气中进行还原,蓝钨还原的钨粉在空气中被氧化为三氧化钨,对此三氧化钨再在氢气中还原,然后利用扫描电子显微镜和激光粒度分析仪对试样进行分析,结果表明:经过循环一次氧化和两次还原,制备出了粒径分布在3～10μm之间占83.86%、比表面积为0.180m2/g的中颗粒钨粉。
Using pure pure ammonium paratungstate as raw material, pure tungsten ammonium paratungstate is calcined in argon to obtain blue tungsten, which is reduced in hydrogen with a purity of 99.99% and a dew point of less than -40 ° C. The tungsten-tungsten-reduced tungsten powder is coated in the air Which was then oxidized to tungsten trioxide, and the tungsten trioxide was reduced again in hydrogen. The sample was then analyzed by means of a scanning electron microscope and a laser particle size analyzer. The results showed that after the primary oxidation and the two reductions, the particle size Distributed in the 3 ~ 10μm accounted for 83.86%, the specific surface area of 0.180m2 / g in the particles of tungsten powder.