Glass manufacturing – Processes – With chemically reactive treatment of glass preform
Reexamination Certificate
2011-07-12
2011-07-12
Nguyen, Khanh (Department: 1746)
Glass manufacturing
Processes
With chemically reactive treatment of glass preform
C065S031000, C065S023000, C065S033100, C065S021100, C065S021400
Reexamination Certificate
active
07975508
ABSTRACT:
The present invention provides: a method for producing high silicate glass which has a low Fe concentration and can achieve a high UV transmittance while retaining advantages of Vycor glass that mass-production at low cost is feasible and that complex formation with various photofunctional ions can be effected; and high silicate glass of a high UV transmittance. For obtaining the above high silicate glass, the method is characterized by comprising the steps of: heating borosilicate glass including a heavy metal or rare-earth element (preferably a high-valence heavy metal or rare-earth element) so as to phase-separate the borosilicate glass; subjecting the phase-separated borosilicate glass to acid treatment so as to elute a metal; and sintering the acid-treated borosilicate glass.
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Akai Tomoko
Chen Danping
Harness & Dickey & Pierce P.L.C.
Japan Science and Technology Agency
Nguyen Khanh
Squalls Margaret
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