Variable Emittance Coatings for Satellite Thermal Control

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: N/A
Agency Tracking Number: 40775
Amount: $100,000.00
Phase: Phase I
Program: SBIR
Awards Year: 1998
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
111 Downey St., Norwood, MA, 02062
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Stuart F. Cogan
 (781) 769-9450
Business Contact
Phone: () -
Research Institution
The development of thin-film electrochromic coatings for emittance control in the 5-25 um range is proposed. The coatings would be used on satellites and other space structures for modulating radiant heat transfer. They are intended to replace conventional mechanical louvers and provide a new capability to integrate thermal control functions onto a variety of external and internal spacecraft surfaces. The emittance switching is based on electrochromic reactions in thin-films of crystalline WO3 which undergo an infrared transmitting to reflecting modulation when electrochemically reduced to LixWO3. An all-thin-film electrochromic structure is proposed to provide a high degree of space environment stability. The objective of the Phase I program is to demonstrate the fabrication and performance of a thin-film variable emittance tile that would be used as a building block for integration into spacecraft hardware in a Phase Ii effort. The tiles developed in Phase I would have a total emittance modulation of >0.4 and an optically static solar absorptance of <0.18.

* Information listed above is at the time of submission. *

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