New processing method for tungsten carbide nano-crystalline particles and nano structural carbon via polyacrylonitrile gasification

A simple processing route has been developed for a nano-sized crystalline tungsten mono-carbide (WC) and a novel nano-structural carbon materials. Starting materials for WC synthesis were selected tungstic acid (H2WO4) and polyacrylonitrile (PAN) powders. The starting powders were heat-treated at 12...

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Veröffentlicht in:Journal of the Ceramic Society of Japan 2014/07/01, Vol.122(1427), pp.570-573
Hauptverfasser: ONOKI, Takamasa, SHINODA, Yutaka, AKATSU, Takashi, WAKAI, Fumihiro
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container_end_page 573
container_issue 1427
container_start_page 570
container_title Journal of the Ceramic Society of Japan
container_volume 122
creator ONOKI, Takamasa
SHINODA, Yutaka
AKATSU, Takashi
WAKAI, Fumihiro
description A simple processing route has been developed for a nano-sized crystalline tungsten mono-carbide (WC) and a novel nano-structural carbon materials. Starting materials for WC synthesis were selected tungstic acid (H2WO4) and polyacrylonitrile (PAN) powders. The starting powders were heat-treated at 1200°C for 30 min with a nitorgen gas flow in an alumina tube. The acquired WC powder had a nano-sized crystalline and high-specific surface area (26.0 m2 g−1). Crystallite diameter size was estimated to less than 20 nm. Compared with theoretical value, approximately 2.0 mass % of free carbon was measured in the prepared WC. It was observed that layered graphitic carbon was formed around the WC particles. If the graphitic carbon is separated from the WC particles by appropriate techniques or processing conditions, these techniques using PAN as a carbon source may have possibility for processing not only WC but also nano-structural carbon materials such as graphene.
doi_str_mv 10.2109/jcersj2.122.570
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subjects Carbon
Catalyst
Cemented carbide
Crystal structure
Gasification
Graphene
Heat treatment
Materials selection
Nanostructure
Polyacrylonitriles
title New processing method for tungsten carbide nano-crystalline particles and nano structural carbon via polyacrylonitrile gasification
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