Nanocarbon-dependent synthesis of one-dimensional bead-chain-like β-SiC

Bin Zhao, Biyun Yang, Tingyu Wang, Dongfeng Sun, Yongzhen Hu, Ruixing Li, Shu Yin, Junping Li, Zhihai Feng, Huiping Duan, Qing Tang, Tsugio Sato

    Research output: Contribution to journalArticlepeer-review

    8 Citations (Scopus)

    Abstract

    Thermodynamically, SiO2 should react with carbon to form CO and SiC at and above a temperature of 1515°C. However, this reaction is incomplete at 1550°C, even with the use of metastable reactants, such as amorphous SiO2 and active carbon powders. In contrast, complete decomposition of SiO2 is achieved at 1450°C using nanocarbon powders instead of active carbon. Additionally, to clarify the effects of size and morphology of SiO2 on the SiC product, we synthesized different SiO2 precursors. Experimental results reveal that the effects of porous SiO2 on both the size and morphology of SiC particles are evident, but not a decrease in carbothermal reduction temperature. Nanocarbon powders reduce the temperature required for the reaction and also strongly affect the transformation kinetics.

    Original languageEnglish
    Pages (from-to)487-491
    Number of pages5
    JournalPowder Technology
    Volume246
    DOIs
    Publication statusPublished - 2013 Sep

    Keywords

    • Amorphous materials
    • Carbothermal reduction
    • Crystal morphology
    • Nanocarbon
    • β-SiC

    ASJC Scopus subject areas

    • Chemical Engineering(all)

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