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Method for suppressing crystallization of fluoride glass articles by treatment with inorganic fluoride

  • US 5,147,435 A
  • Filed: 05/13/1991
  • Issued: 09/15/1992
  • Est. Priority Date: 05/23/1990
  • Status: Expired due to Fees
First Claim
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1. A method for suppressing crystallization of an article made of a glass consisting of metal fluorides, the method comprising the step of treating at least one surface of the glass article with a solution of an inorganic fluorine compound, which is selected from the group consisting of alkali metal compounds containing fluorine and ammonium compounds containing fluorine, in an organic solvent having no water by immersing the glass article in said solution for at least about 3 hr.

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