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Title: 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 A
Application Number:
PPN: US 7-331782
Assignee:
Schott Glass Technologies, Inc., Duryea, PA (United States) PTO; EDB-94-117966
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}
}