Phosphate glass useful in high power lasers

Patent · Tue May 29 00:00:00 EDT 1990

OSTI ID:7068377

Hayden, J S; Sapak, D L; Ward, J M

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.

• DOE Contract Number: W-7405-ENG-48
• Assignee: Schott Glass Technologies, Inc., Duryea, PA (United States)
• Patent Number(s): US 4929387; A
• Application Number: PPN: US 7-331782
• OSTI ID: 7068377
• Resource Relation: Patent File Date: 3 Apr 1989
• Country of Publication: United States
• Language: English

Related Subjects

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 &amp; Masers- (1990-)
360606 - Other Materials- Physical Properties- (1992-)