In this work, adopting tungsten blue oxide (TBO, W₁₀O₂₉ as main phase) as precursor, nano tungsten powder and nano tungsten carbide powder were successfully prepared through two steps of hydrogen reduction and carbonization. In tungsten powder preparation, it was found that the essence of β-W transition was a separation between oxygen removal and phase transition. Based on nucleation energy control, nano tungsten powder with a BET value as high as 25.55 m²/g was prepared. On this basis, nano tungsten carbide powder with a BET value of 3.87 m²/g, which is at a leading level, was obtained by adopting a high temperature-short time process.

中文翻译：

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脱氧和相变之间的分离：制备纳米级碳化钨粉末的新途径

本文以氧化钨蓝（TBO，W ₁₀ O ₂₉为主要相）为前驱体，通过氢气还原和碳化两个步骤成功制备了纳米钨粉和纳米碳化钨粉。在钨粉制备中，发现β-W转变的本质是氧去除和相转变之间的分离。基于成核能控制，制备了BET值高达25.55m ² / g的纳米钨粉。在此基础上，采用高温短时工艺，获得了领先水平的BET值为3.87 m ² / g的纳米碳化钨粉。