Method of producing optical quality glass having a selected refractive index
Abstract
Optical quality glass having a selected refractive index is produced by a two stage drying process. A gel is produced using sol-gel chemistry techniques and first dried by controlled evaporation until the gel volume reaches a pre-selected value. This pre-selected volume determines the density and refractive index of the finally dried gel. The gel is refilled with solvent in a saturated vapor environment, and then dried again by supercritical extraction of the solvent to form a glass. The glass has a refractive index less than the full density of glass, and the range of achievable refractive indices depends on the composition of the glass. Glasses having different refractive indices chosen from an uninterrupted range of values can be produced from a single precursor solution.
- Inventors:
-
- Livermore, CA
- Issue Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- OSTI Identifier:
- 873430
- Patent Number(s):
- 6158244
- Assignee:
- Regents of University of California (Oakland, CA)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C03 - GLASS C03B - MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
C - CHEMISTRY C03 - GLASS C03C - CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUS ENAMELS
- DOE Contract Number:
- W-7405-ENG-48
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- method; producing; optical; quality; glass; selected; refractive; index; produced; stage; drying; process; sol-gel; chemistry; techniques; dried; controlled; evaporation; volume; reaches; pre-selected; value; determines; density; finally; refilled; solvent; saturated; vapor; environment; supercritical; extraction; form; range; achievable; indices; depends; composition; glasses; chosen; uninterrupted; values; single; precursor; solution; precursor solution; supercritical extraction; refractive index; optical quality; saturated vapor; producing optical; quality glass; sol-gel chemistry; drying process; selected refractive; index optical; selected value; /65/
Citation Formats
Poco, John F, and Hrubesh, Lawrence W. Method of producing optical quality glass having a selected refractive index. United States: N. p., 2000.
Web.
Poco, John F, & Hrubesh, Lawrence W. Method of producing optical quality glass having a selected refractive index. United States.
Poco, John F, and Hrubesh, Lawrence W. Sat .
"Method of producing optical quality glass having a selected refractive index". United States. https://www.osti.gov/servlets/purl/873430.
@article{osti_873430,
title = {Method of producing optical quality glass having a selected refractive index},
author = {Poco, John F and Hrubesh, Lawrence W},
abstractNote = {Optical quality glass having a selected refractive index is produced by a two stage drying process. A gel is produced using sol-gel chemistry techniques and first dried by controlled evaporation until the gel volume reaches a pre-selected value. This pre-selected volume determines the density and refractive index of the finally dried gel. The gel is refilled with solvent in a saturated vapor environment, and then dried again by supercritical extraction of the solvent to form a glass. The glass has a refractive index less than the full density of glass, and the range of achievable refractive indices depends on the composition of the glass. Glasses having different refractive indices chosen from an uninterrupted range of values can be produced from a single precursor solution.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Jan 01 00:00:00 EST 2000},
month = {Sat Jan 01 00:00:00 EST 2000}
}
Works referenced in this record:
Cavitation during drying of a gel
journal, September 1995
- Scherer, George W.; Smith, Douglas M.
- Journal of Non-Crystalline Solids, Vol. 189, Issue 3