Browse Publications Technical Papers 2002-01-2549
2002-07-15

Integrated Thin-Film Smart Coatings with Dynamically-Tunable Thermo-Optical Characteristics 2002-01-2549

This paper presents experimental results regarding a new approach to smart radiator devices (SRD) employing a smart, integrated thin-film structure based on V1-x-yMxNyOn that can be applied to existing thermal blankets such as Kapton or to thermal radiators such as Al. The smart coating facilitates thermal control by dynamically modifying the thermo-optic characteristics of the underlying substrate in response to the ambient temperature and/or a control voltage. This methodology has significant advantages over competitive technologies in terms of weight, cost, structural simplicity, and integration with the space structure. The effective emissivity of the film/substrate structure can be reduced dynamically by changing the behavior of the smart coating from insulator to metallic. High quality VO2 films have been prepared using a hybrid reactive laser ablation technique. These films can exhibit high transmittance in the insulating state, exceeding 75% from the NIR to beyond 12 μm, and correspondingly high reflectance in the metallic state. Additional dopants, M and N, are employed to tailor the metal-insulator transition characteristics, providing control of the transition temperature, slope and hysteresis.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Thermal Design and Model Correlation of a Microgravity Vibration Isolation System for an International Space Station Facility

2006-01-2165

View Details

TECHNICAL PAPER

Thermal Design and Analysis of the Phoenix Mars Lander Meteorological Instrument

2007-01-3240

View Details

TECHNICAL PAPER

Nanofluids as Working Media for Loop Heat Pipes

2006-01-2175

View Details

X