Pressurized heat treatment of glass-ceramic to control thermal expansion
- Dayton, OH
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.
- Research Organization:
- MONSANTO RESEARCH CORP
- DOE Contract Number:
- AC04-76DP00053
- Assignee:
- United States of America as represented by Department of Energy (Washington, DC)
- Patent Number(s):
- US 4536203
- OSTI ID:
- 865556
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
heat
treatment
glass-ceramic
control
thermal
expansion
method
producing
specified
value
disclosed
step
pressurizing
parent
glass
material
predetermined
pressure
produced
preferably
isostatically
pressed
forming
strong
metal
seal
fabricated
equal
determination
placed
high-temperature
environment
determine
predetermined pressure
ceramic material
thermal expansion
heat treatment
isostatically pressed
metal seal
value equal
temperature environment
glass material
parent glass
material placed
high-temperature environment
ceramic mater
control thermal
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