Phosphate glass useful in high power lasers
Abstract
A low- or no-silica phosphate glass useful as a laser medium and having a high thermal conductivity, K[sub 90 C] > 0.8 W/mK, and a low coefficient of thermal expansion, [alpha][sub 20--40 C] < 80[times]10[sup [minus]7]/C, consists essentially of (on a batch composition basis Mole %): P[sub 2]O[sub 5], 45-70; Li[sub 2]O, 15-35; Na[sub 2]O, 0-10; Al[sub 2]O[sub 3], 10-15; Nd[sub 2]O[sub 3], 0.01-6; La[sub 2]O[sub 3], 0-6; SiO[sub 2], 0-8; B[sub 2]O[sub 3], 0-8; MgO, 0-18; CaO, 0-15; SrO, 0-9; BaO, 0-9; ZnO, 0-15; the amounts of Li[sub 2]O and Na[sub 2]O providing an average alkali metal ionic radius sufficiently low whereby said glass has K[sub 90 C] > 0.8 W/mK and [alpha][sub 20--40 C] < 80[times]10[sup [minus]7]/C, and wherein, when the batch composition is melted in contact with a silica-containing surface, the final glass composition contains at most about 3.5 mole % of additional silica derived from such contact during melting. The Nd[sub 2]O[sub 3] can be replaced by other lasing species. 3 figs.
- Inventors:
- Issue Date:
- OSTI Identifier:
- 7068377
- Patent Number(s):
- 4929387
- Application Number:
- PPN: US 7-331782
- Assignee:
- Schott Glass Technologies, Inc., Duryea, PA (United States)
- DOE Contract Number:
- W-7405-ENG-48
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 3 Apr 1989
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; 36 MATERIALS SCIENCE; LASER MATERIALS; CHEMICAL COMPOSITION; THERMAL CONDUCTIVITY; THERMAL EXPANSION; PHOSPHATE GLASS; ALUMINIUM OXIDES; BARIUM OXIDES; BORON OXIDES; CALCIUM OXIDES; CONCENTRATION RATIO; LANTHANUM OXIDES; LITHIUM OXIDES; MAGNESIUM OXIDES; NEODYMIUM OXIDES; PHOSPHORUS OXIDES; SILICON OXIDES; SODIUM OXIDES; STRONTIUM OXIDES; ZINC OXIDES; ALKALI METAL COMPOUNDS; ALKALINE EARTH METAL COMPOUNDS; ALUMINIUM COMPOUNDS; BARIUM COMPOUNDS; BORON COMPOUNDS; CALCIUM COMPOUNDS; CHALCOGENIDES; EXPANSION; GLASS; LANTHANUM COMPOUNDS; LITHIUM COMPOUNDS; MAGNESIUM COMPOUNDS; MATERIALS; NEODYMIUM COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PHOSPHORUS COMPOUNDS; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; SILICON COMPOUNDS; SODIUM COMPOUNDS; STRONTIUM COMPOUNDS; THERMODYNAMIC PROPERTIES; ZINC COMPOUNDS; 426002* - Engineering- Lasers & Masers- (1990-); 360606 - Other Materials- Physical Properties- (1992-)
Citation Formats
Hayden, J S, Sapak, D L, and Ward, J M. Phosphate glass useful in high power lasers. United States: N. p., 1990.
Web.
Hayden, J S, Sapak, D L, & Ward, J M. Phosphate glass useful in high power lasers. United States.
Hayden, J S, Sapak, D L, and Ward, J M. Tue .
"Phosphate glass useful in high power lasers". United States.
@article{osti_7068377,
title = {Phosphate glass useful in high power lasers},
author = {Hayden, J S and Sapak, D L and Ward, J M},
abstractNote = {A low- or no-silica phosphate glass useful as a laser medium and having a high thermal conductivity, K[sub 90 C] > 0.8 W/mK, and a low coefficient of thermal expansion, [alpha][sub 20--40 C] < 80[times]10[sup [minus]7]/C, consists essentially of (on a batch composition basis Mole %): P[sub 2]O[sub 5], 45-70; Li[sub 2]O, 15-35; Na[sub 2]O, 0-10; Al[sub 2]O[sub 3], 10-15; Nd[sub 2]O[sub 3], 0.01-6; La[sub 2]O[sub 3], 0-6; SiO[sub 2], 0-8; B[sub 2]O[sub 3], 0-8; MgO, 0-18; CaO, 0-15; SrO, 0-9; BaO, 0-9; ZnO, 0-15; the amounts of Li[sub 2]O and Na[sub 2]O providing an average alkali metal ionic radius sufficiently low whereby said glass has K[sub 90 C] > 0.8 W/mK and [alpha][sub 20--40 C] < 80[times]10[sup [minus]7]/C, and wherein, when the batch composition is melted in contact with a silica-containing surface, the final glass composition contains at most about 3.5 mole % of additional silica derived from such contact during melting. The Nd[sub 2]O[sub 3] can be replaced by other lasing species. 3 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1990},
month = {5}
}