Pressurized heat treatment of glass ceramic

Patent · Thu Apr 19 00:00:00 EST 1984

OSTI ID:6368058

Kramer, D P

A method of producing a glass-ceramic having a specified thermal expansion value is disclosed. The method includes the step of pressurizing the parent glass material to a predetermined pressure during heat treatment so that the glass-ceramic produced has a specified thermal expansion value. Preferably, the glass-ceramic material is isostatically pressed. A method for forming a strong glass-ceramic to metal seal is also disclosed in which the glass-ceramic is fabricated to have a thermal expansion value equal to that of the metal. The determination of the thermal expansion value of a parent glass material placed in a high-temperature environment is also used to determine the pressure in the environment.

• DOE Contract Number: AC04-76DP00053
• Assignee: Dept. of Energy
• Application Number: ON: TI85006436
• OSTI ID: 6368058
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CERAMICS
PRODUCTION
GLASS
HEAT TREATMENTS
METALS
PRESSING
PRESSURIZING
SEALS
THERMAL EXPANSION
ELEMENTS
EXPANSION
FABRICATION
MATERIALS WORKING
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication