High thermal expansion glass composites and uses thereof
| DWPI Title: Filled-glass composite used as e.g. glass-ceramic seal, comprises silicon dioxide as high-quartz phase and tridymite phase, lithium oxide, aluminum oxide, potassium oxide, phosphorus pentoxide, boron oxide, and zinc oxide |
| Abstract: The present invention relates to glass composites, including filled glass composites and uses thereof. In particular examples, the composites provide improved thermal expansion characteristics. Also described are methods of forming such composites, such as by adding a particle filler to a glass mixture. |
| Use: Filled-glass composite used as glass-ceramic preform and glass-ceramic seal (all claimed). Uses include but are not limited to electrical connectors with hermetic seals in aerospace application, such as communication satellite, microwave communication equipment, military communication and radar system, automotive industry, and commercial communication application. |
| Advantage: The glass composite is tunable, and has excellent thermal expansion characteristics, physical and chemical properties, sealing capability, structural characteristics, is manufactured by simple and robust method, and provides sealing material having excellent seal performance and reliability. The composite matrix has high-coefficient of thermal expansion in the presence of the filler. The amount of the filler to be added in the composite can be controlled. The physical and chemical properties can be tuned by the amount of the added filler. |
| Novelty: A filled-glass composite comprises 70-90 wt.% silicon dioxide, 3-14 wt.% lithium oxide, 0.8-7 wt.% aluminum oxide, 0.4-7 wt.% potassium oxide, 0.4-5 wt.% phosphorus pentoxide, 0.2-7 wt.% boron oxide, and 0.1-5 wt.% zinc oxide, and further comprises 2-10 wt.% silicon oxide as high-quartz phase and 2-20 wt.% silicon dioxide as tridymite phase. |
| Filed: 5/31/2018 |
| Application Number: US15993889A |
| Tech ID: SD 14026.1 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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