Density and thermal expansion measurements of several mixed oxide glasses in the solid and liquid regions

Technical Report · Sat Dec 01 04:00:00 EST 1984

DOI:https://doi.org/10.2172/5994693· OSTI ID:5994693

Drotning, W D

The density and thermal expansion of a number of mixed oxide glasses were measured in the solid and liquid regions by gamma densitometry. With this non-contacting technique, both physical regimes may be investigated as the temperature is varied and the glass viscosity varies over a wide range. Where rate-dependent crystallization can occur, the technique allows the continuous measurement of density as the liquid cools to a supercooled glass or a crystalline solid. Lead borate glasses were investigated in the range from 27 to 42 mol % PbO. The liquid phase volumetric thermal expansion coefficient was observed to decrease with increasing PbO content, in contrast to the solid phase linear thermal expansion coefficient. In soda-baria phosphate glasses (50 mol % P/sub 2/O/sub 5/), liquid phase volumetric expansion coefficients were found to vary as the solid phase linear expansion coefficients. Two soda-alumina silicate glasses (60 mol % SiO/sub 2/) were investigated as well. Measurements on a lithia-aluminosilicate glass ceramic were obtained by this method to approximately 400/sup 0/C above the limit of conventional dilatometry, thereby allowing the measurement of the thermal expansion of high temperature crystalline phases, as well as the liquid phase density.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5994693
• Report Number(s): SAND-84-2006; ON: DE85006134
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BARIUM COMPOUNDS
BARIUM OXIDES
BORATES
BORON COMPOUNDS
CHALCOGENIDES
DENSITY
EXPANSION
GLASS
LEAD COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHOSPHATE GLASS
PHOSPHATES
PHOSPHORUS COMPOUNDS
PHYSICAL PROPERTIES
SILICON COMPOUNDS
SILICON OXIDES
SODIUM COMPOUNDS
SODIUM OXIDES
THERMAL EXPANSION