60 K Phase Change Material Device.
Final rept. Apr 94-Apr 95,
SWALES AND ASSOCIATES INC BELTSVILLE MD
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The objective of this Phase I SBIR program was to demonstrate the feasibility of phase change material device PCMD technology at 60 K. The application for this technology will be to optimize the improve the reliability, and reduce the cost of space-based infrared IR sensor systems for the DoD. In Phase I, an apparatus was designed and constructed for testingcharacterizing PCMs and PCMDs, a one-tenth scale prototype PCMD was designed, analyzed, fabricated, and successfully tested, and four PCMs - nitrogen, freon-22, air, and nitrogen trifluoride - were performance tested. In addition, a plan was prepared for continued Phase II development. The experimental results indicate that nitrogen trifluoride is a very promising 60 K PCM. In particular, the testing showed that a nitrogen trifluoride-based PCMD has over two times the energy storage capacity of a nitrogen-based PCMD, and four times the energy storage capacity of a high heat capacity solid device.
- Infrared Detection and Detectors