Journal of Sol-Gel Science and Technology

, Volume 19, Issue 1–3, pp 681–685 | Cite as

Photochromic Coatings Containing Ag(Cl1−xBrx) Microcrystals

  • Hiroyuki Tomonaga
  • Takeshi Morimoto


Photochromic ormosil coatings containing Ag(Cl1−xBrx) microcrystals were formed on a glass substrate via the sol-gel process. Methyltrimethoxysilane and 3-glycidoxypropyltrimethoxysilane were used as starting materials of the ormosil matrices. 3-chloropropyltrimethoxysilane and bromophenyltrimethoxysilane were added as halogen sources and silver colloidal dispersion was introduced into the precursor sol. The coated glass became transparent and photosensitive after Ag(Cl1−xBrx) microcrystals were precipitated in the coatings above 300°C. Insertion of a SiO2 buffer layer between the substrate and photochromic layer was effective in preventing Ag+ migration into the substrate. Photochromic performances were improved by the substitution of Cl with Br and the incorporation of a minute amount of Cu.

silver halide photochromic ormosil coating silver colloidal dispersion 


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Copyright information

© Kluwer Academic Publishers 2000

Authors and Affiliations

  • Hiroyuki Tomonaga
    • 1
  • Takeshi Morimoto
    • 1
  1. 1.Research CenterAsahi Glass Co., LtdYokohama-shi, KanagawaJapan

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