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首页> 外文期刊>Journal of Advanced Ceramics >Preparation of SiC powders by carbothermal reduction with bamboo charcoal as renewable carbon source
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Preparation of SiC powders by carbothermal reduction with bamboo charcoal as renewable carbon source

机译：以竹炭为可再生碳源的碳热还原法制备SiC粉

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摘要

Bamboo charcoal was expected to be a renewable carbon source for carbide materials in carbothermal reduction because of its superior characteristics. SiC powders with characteristic shapes were fabricated by carbothermal reduction with industrial silica sol and bamboo charcoal particles as silicon and carbon sources respectively, and the effects of reacting temperature and time on shape evolutions and properties of the as-prepared SiC powders were investigated. The silica sol/bamboo charcoal system was firstly transformed into SiO2/C system by the transition of silica sol and graphitization of bamboo charcoal, and the carbothermal reduction between SiO2 and C occurred at/above 1600 °C. The characteristic shapes of SiC particles were transformed from string-beads-like to dumbbell-like and rod-like with the increase of reacting temperature. The prepared SiC powders are expected to become new raw material for silicon carbide ceramic composites.
机译：竹炭由于其优越的特性，有望在碳热还原中成为碳化物材料的可再生碳源。以工业硅溶胶和竹炭颗粒分别为碳源和碳源，通过碳热还原法制备了具有特征形状的SiC粉，研究了反应温度和时间对制备的SiC粉的形貌演变和性能的影响。硅溶胶/竹炭体系首先通过硅溶胶的转变和竹炭的石墨化转变为SiO2 / C体系，SiO2和C之间的碳热还原发生在1600℃以上。随着反应温度的升高，SiC颗粒的特征形状从串珠状转变为哑铃状和棒状。制备的SiC粉有望成为碳化硅陶瓷复合材料的新原料。

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