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텅스텐 에톡사이드의 기상 반응을 이용한 초미립 WC 분말의 합성

Synthesis of Nano-sized Tungsten Carbide Powders by Vapor Phase Reaction of Tungsten Ethoxide

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주제분류금속공학

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Abstract

Nano-sized WC powders were synthesized by vapor phase reaction using the precusor of tungsten ethoxide under helium and hydrogen atmosphere. The phases of the powder were varied with reaction zone and gas flow rate. The powder size was about 30nm in diameter, and the tungsten carbide powder was coated by carbon layer. The synthesis of nano-sized WC powders was promoted as the hydrogen gas flow rate became higher. Inversely, tungsten oxide was formed by increasing the flow rate of helium gas. The synthesized powders were analyzed by XRD, FE-SEM, carbon analyzer etc.

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