NDLI: Indium tin oxide-magnesium fluoride co-deposited films for spacecraft applications

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Indium tin oxide-magnesium fluoride co-deposited films for spacecraft applications

Content Provider	NASA Technical Reports Server (NTRS)
Author	Bruckner, Eric Ferrante, Rhea Mayer, Karen Pal, Anna Marie Hambourger, Paul D. Rutledge, Sharon K. Pietromica, Anthony J. Dever, Joycer A.
Copyright Year	1998
Description	Highly transparent coatings with a maximum sheet resistivity between 10(exp 8) and 10(exp 9) ohms/square are desired to prevent charging of solar arrays for low Earth polar orbit and geosynchronous orbit missions. Indium tin oxide (ITO) and magnesium fluoride (MgF2) were ion beam sputter co-deposited onto fused silica substrates and were evaluated for transmittance, sheet resistivity and the effects of simulated space environments including atomic oxygen (AO) and vacuum ultraviolet (VUV) radiation. Optical properties and sheet resistivity as a function of MgF2 content in the films will be presented. Films containing 8.4 wt.% MgF2 were found to be highly transparent and provided sheet resistivity in the required range. These films maintained a high transmittance upon exposure to AO and to VUV radiation, although exposure to AO in the presence of charged species and intense electromagnetic radiation caused significant degradation in film transmittance. Sheet resistivity of the as-fabricated films increased with time in ambient conditions. Vacuum beat treatment following film deposition caused a reduction in sheet resistivity. However, following vacuum heat treatment, sheet resistivity values remained stable during storage in ambient conditions.
File Size	919031
Page Count	19
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19980235566
Archival Resource Key	ark:/13960/t41s1r40d
Language	English
Publisher Date	1998-08-01
Access Restriction	Open
Subject Keyword	Nonmetallic Materials Heat Treatment Electromagnetic Radiation Exposure Coatings Thin Films Silica Glass Fabrication Low Earth Orbits Spacecraft Components Electrical Resistivity Far Ultraviolet Radiation Indium Compounds Geosynchronous Orbits Spacecraft Design Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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