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本文选择两批不同超细APT为原料,通过优化工艺在回转炉内调整工艺参数制备出BET粒度小于300 nm的纳米WO3,然后将WO3在还原炉内通过逆氢低温快速还原工艺制取BET粒度小于100 nm的纳米钨粉,最后以纳米钨粉为原料利用低温快速碳化法生产出BET粒度小于200 nm的准纳米WC粉。通过费氏法、氮吸附法进行粉末粒度检测,采用扫描电镜进行粉末的形貌分析。结果表明,以2.5μm超细APT为原料通过优化传统工艺可以制备出BET粒度0.15μm的准纳米WC粉。
In this paper, two batches of different ultrafine APT were selected as raw materials to prepare WO3 with BET particle size less than 300 nm by adjusting the process parameters in the rotary kiln through the optimization process. The BET particle size was obtained by reverse-hydrogen low temperature rapid reduction of WO3 in the reduction furnace Less than 100 nm of nano-tungsten powder, and finally nano-tungsten powder as the raw material to use rapid low-temperature carbonization method to produce BET particle size less than 200 nm quasi-nano WC powder. The powder particle size was detected by Fisher’s method and nitrogen adsorption method, and the morphology of the powder was analyzed by scanning electron microscopy. The results show that the nanocrystalline WC powder with BET size of 0.15μm can be prepared by optimizing the traditional process with 2.5μm ultrafine APT as raw material.