Crystal reduction in TA-23 glass-to-metal seals. [For lithium ambient-temperature batteries]
TA-23 glass is used in the fabrication of headers for lithium ambient-temperature batteries. The glass was observed to crystallize during processing at the sealing temperature originally specified. Thermal expansion characteristics of the crystal phase suggested potential problems from residual stresses in the glass seal. Two methods are presented to reduce or eliminate the crystallization: improvement of the glass preform surface finish and lower temperature sealing. Both methods were successful in reducing crystallization in the glass during sealing. Sealed headers were characterized for seal integrity by acoustic emission pressure testing and pin-pull testing. Seals without the crystals were found to be stronger than those with the crystals present. Details of the process development and mechanical testing are presented.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6553376
- Report Number(s):
- SAND-87-0181; ON: DE87009689
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ELECTRIC BATTERIES
SEALS
ACOUSTIC EMISSION TESTING
CRYSTALLIZATION
GLASS
INSPECTION
LITHIUM
METALS
ACOUSTIC TESTING
ALKALI METALS
ELECTROCHEMICAL CELLS
ELEMENTS
MATERIALS TESTING
NONDESTRUCTIVE TESTING
PHASE TRANSFORMATIONS
TESTING
250903* - Energy Storage- Batteries- Materials
Components
& Auxiliaries