A method of removing metal ions from silicate glasses for recycling by liquid-phase deposition

研究成果: Article査読

3 被引用数 (Scopus)

抄録

A method of removing metal ions from silicate glasses for recycling was studied. This method utilizes a liquid-phase deposition (LPD) technique using a hydrofluosilicic acid (H2SiF6) aqueous solution supersaturated with silica. Silicate glass powder prepared from a glass bottle was dissolved in aqueous hydrofluoric acid (HF) solution. The fluorinated silicon oxide (SiOF) separated from the H2SiF6, and then an LPD-SiOF gel was formed in the supersaturated H2SiF6 aqueous solution. Almost all ratios of metals to silicon (Si) were reduced by at least one order of magnitude. The LPD-SiOF powder formed by drying the LPD-SiOF gel at 23 °C showed a different chemical bonding structure than that of the initial silicate glass powder. The LPD-SiOF powder showed a cluster structure of spheres 1-2 μm in diameter. A possible mechanism for removal of the non-Si primary component metal oxides and other impurity metal ions is proposed. The features of this method and a possible application for recycled silica are also discussed.

本文言語English
ページ(範囲)25-31
ページ数7
ジャーナルJournal of Non-Crystalline Solids
291
1-2
DOI
出版ステータスPublished - 2001 10月

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • セラミックおよび複合材料
  • 凝縮系物理学
  • 材料化学

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