Thermal Control Coatings for Satellites

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$600,000.00
Award Year:
1995
Program:
SBIR
Phase:
Phase II
Contract:
n/a
Award Id:
22709
Agency Tracking Number:
22709
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
111 Downey Street, Norwood, MA, 02062
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Stuart F. Cogan
(617) 769-9450
Business Contact:
() -
Research Institution:
n/a
Abstract
The development of coatings with electrically tunable infrared emittance for controlling radiant heat transfer in the space environment is proposed. The emittance modulation is achieved using electrochromic materials whose infrared reflectance can be continuously and reversibly modulated. The coatings have a multilayer, thin film structure that allows emittance to be switched in response to a low voltage DC signal. Innovations in electrochromic materials, infrared transparent electrical contacts, and vacuum deposition processes which allow fabrication of the coatings with a large emittance modulation are proposed. The objective of the Phase I program is the fabrication and characterization of variable emittance coatings employing crystalline LixWO3 as the variable reflectance component. Emittance switching between ~0.2-0.8 in the 3-14 um wavelength range is sought for Phase I coatings. The coatings may be attached to external surfaces of spacecraft, individual instrument packages, or on radiator surfaces. They will allow a non-mechanical means of temperature control and heat distribution through radiant transfer between exterior and interior surfaces. These capabilities should greatly enhance the performance and flexibility of thermal management systems without adding significant weight or complexity.

* information listed above is at the time of submission.

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