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Founded in 1987， Bimonthly
Supervisor：Jiangxi University Of Science And Technology
Sponsored by：Jiangxi University Of Science And Technology
Jiangxi Nonferrous Metals Society
ISSN：1674-9669
CN：36-1311/TF
CODEN YJKYA9
Volume 6 Issue 6
Dec.  2015
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LI Shaoyuan, LI Yuping, CHEN Xiuhua, MA Wenhui. Research on impurity removal of industrial silicon powder through introduce of nano-porous structure[J]. Nonferrous Metals Science and Engineering, 2015, 6(6): 7-13. DOI: 10.13264/j.cnki.ysjskx.2015.06.002
Citation: LI Shaoyuan, LI Yuping, CHEN Xiuhua, MA Wenhui. Research on impurity removal of industrial silicon powder through introduce of nano-porous structure[J]. Nonferrous Metals Science and Engineering, 2015, 6(6): 7-13. DOI: 10.13264/j.cnki.ysjskx.2015.06.002
shu

Research on impurity removal of industrial silicon powder through introduce of nano-porous structure

  • 1a.

    State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China

  • 1b.

    Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China

  • 2.

    Faculty of Physical Science and Technology, Yunnan University, Kunming 650091, China

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  • Received Date: December 15, 2015
  • Published Date: December 30, 2015
    Graphical Abstract
    • Abstract
  • Based on industrial silicon powders, porous silicon powders were prepared with methods of chemical etching, one-step metal-assisted chemical etching(1-MACE), and two-step metal-assisted chemical etching (2-MACE). The effects of species and concentrations of oxidants on the morphologies and structures of porous industrial silicon as well as the removal rate of metal impurities Fe and Al were investigated. Metal nanoparticles assisted etching methods are better at controlling the growth rate and morphologies of the porous channel. With proper species and concentrations of oxidants, porous industrial silicon powders with controllable channel diameter in range of 50 -300 nm and depth within about 60 μm can be effectively obtained by MACE methods. Nano-channels can improve the removal efficiencies of Fe and Al impurities from industrial silicon, which particularly reached 99.8 % and 94.7 % under optimum experimental conditions with 2-MACE method.
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    • References (30)
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