Preparation of micro-porous Si particles from Mg2Si powder

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    Abstract

    Polycrystalline Si powder consisting of micro-porous particles was prepared by heating Mg2Si powder at 600 °C for 40 h under a pressure of 500 Pa. The porous Si particles were composed of primary Si crystals ranging in size from 100 nm to 5 μm with pores less than 10 μm in size. Porous Si particles with similar morphology were also prepared at 700 °C for 50 Pa and 500 Pa for 10 h. The formation of the porous Si particles was attributed to Mg evaporation from Mg2Si particles, followed by crystallization of Si.

    Original languageEnglish
    Pages (from-to)157-160
    Number of pages4
    JournalMaterials Letters
    Volume98
    DOIs
    Publication statusPublished - 2013

    Keywords

    • Microstructure
    • Porous materials
    • Powder processing
    • Silicon

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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