Effect of aluminum fluoride on the physical properties and stability of fluorozirconate and fluorozirco-hafnate glasses

Journal Article · Sat Sep 01 04:00:00 EDT 1990 · Journal of the American Ceramic Society; (USA)

OSTI ID:6066608

Busse, L; Aggarwal, I ^[1]; Sanghera, J S ^[2]; Hart, P; Sachon, M G ^[3]

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1. Naval Research Lab., Washington, DC (US)
2. Geo-centers Inc., Ft. Washington, MD (US)
3. Sachs/Freeman Associates, Inc., Landover, MD (US)

The glass quality, physical properties, and thermal stability of fluorozirconate and fluorozirco-hafnate glasses were investigated as a function of the AIF{sub 3} content. The AIF{sub 3} concentration varied from 2 to 3.25 mol%. The ratio of the other components was constant, except for 50% substitution of ZrF{sub 4} by HfF{sub 4} in the fluorozirco-hafnate glasses. The physical properties of all the glasses were not affected strongly by AlF{sub 3} content. However, the fluorozirco-hafnate glasses were prone to precipitate out AlF{sub 3} microcrystals for AlF{sub 3} contents greater than 3 mol%. The thermal stability of the glasses revealed a compositional dependence only in the case of the fluorozirco-hafnate glasses. The thermal stability decreased as the AlF{sub 3} content increased above 3 mol%. The authors conclude that the AlF{sub 3} microcrystals nucleated other fluoride phases such as zirconium-barium fluoride crystals.

• OSTI ID: 6066608
• Journal Information: Journal of the American Ceramic Society; (USA), Journal Name: Journal of the American Ceramic Society; (USA) Vol. 73:9; ISSN JACTA; ISSN 0002-7820
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
360602 -- Other Materials-- Structure & Phase Studies
ALUMINIUM COMPOUNDS
ALUMINIUM FLUORIDES
CHEMICAL COMPOSITION
CRYSTAL DOPING
FLUORIDES
FLUORINE COMPOUNDS
GLASS
HAFNIUM COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HEAT RESISTANT MATERIALS
MATERIALS
PHYSICAL PROPERTIES
REFRACTORY METAL COMPOUNDS
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS