Silica‐free sealing glass for sodium‐beta alumina battery
Source abstract
Abstract
Abstract A CaO‐Bi 2 O 3 ‐Al 2 O 3 ‐B 2 O 3 glass system was studied as a sealant for sodium‐sulfur battery. The thermal properties such as thermal expansion coefficient, glass transition, and softening temperature were determined by dilatometry and differential scanning calorimetry. Selected glasses, based on the thermal properties, were bonded with α‐alumina substrate followed by aging in air at 400°C for 100 hours and in sodium vapor at 350°C for 100 hours. The interfacial compatibility and resistance to sodium vapor corrosion of the bonded and aged samples were evaluated by structural and microstructural analysis using X‐ray diffractometer ( XRD ) and scanning electron microscope ( SEM ) attached with energy dispersive spectroscope ( EDS ). Helium leakage test was performed at room temperature to examine the sealing ability of the select glass. It is found that Bi 2 O 3 increases the thermal expansion coefficient, decreases the glass transition and softening temperature, shows excellent interfacial compatibility and thermal cycling resistance, improves sealing ability, and degrades sodium corrosion resistance.
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Research context
OpenAlex topics: Ferroelectric and Piezoelectric Materials · Glass properties and applications · Microwave Dielectric Ceramics Synthesis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Fraunhofer Center for Energy Innovation University of Connecticut Storrs Connecticut
Materials Science and Engineering University of Connecticut Storrs Connecticut
Materials Science and Engineering University of Alabama at Birmingham Birmingham Alabama
Funding
University of Connecticut
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