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US 6,386,002 B1Granted
Process entailing sol-gel production of silica glass
AssigneeFitel USA Corp.
InventorsSuhas Dattatreya Bhandarkar, David Wilfred Johnson, Jr., John Burnette MacChesney, Thomas Edward Stockert
Life of this patent
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Abstract
A silica-water dispersion suitable for use as a sol for sol-gel fabrication is produced from a silica-water mixture with addition of alkaline agent. The agent functions to increase viscosity so as to improve dispersing efficiency during shear mixing.
Claims9
Process comprising forming a silica sol of substantially unagglomerated silica, the process comprising the steps of forming an initial mixture of silica particles in water and subjecting the mixture to shear-mixing, thereby forming the silica sol,
- including an agent in the initial mixture so that the pH is a value in the range of pH6 to pH9, in which the agent comprises alkaline material containing no metal cation.
Dependencies are inferred from the claim text.