Inorganic Films for Solar Energy Absorption. Part I.

Item

Title
Inorganic Films for Solar Energy Absorption. Part I.
Date
1962
Index Abstract
Coming Soon
Photo Quality
Not Needed
Report Number
ASD TDR 62-92 Part 1
Corporate Author
Engelhard Industries Inc East Newark NJ
Laboratory
Directorate of Materials and Processes
Extent
39
Identifier
AD0282008
Access Rights
ASTIA
Distribution Classification
1
Contract
AF 33(616)-7849
DoD Project
7340
DoD Task
734007
DTIC Record Exists
No
Distribution Change Authority Correspondence
PER AFML LTR
Abstract
This research was limited to an evaluation of the optical properties of thin films on glass. These films were obtained by the application of metallo-organic solutions of the metals, followed by thermal decomposition of the organics in air.More than 1000 samples were made. Of these about 329 were measured for percent reflection , percent transmission, or both. It was found that a thin film containing gold, bismuth, barium, silicon, rhodium and chromium has optical properties which meet the minimum goal of this project, namely, absorption of solar energy of wavelengths below 1.5 microns and reflection of wavelengths above 1.5 microns. This system was extensively reformulated without great optical improvement.While the research demonstrated that the desired optical properties can be obtained by a single application of the proper solution of gold and other metals, it is noteworthy that the best optical film found was a relatively impure gold film. In this film, minor changes in bismuth, barium, silicon or chromium content had pronounced optical effects.In the six component system found to be the best optically, it was demonstrated that additions of barium or silicon in small amounts or of platinum or palladium in substantial amounts decrease reflection. It was also found that very small chromium additions increase reflection.
Report Availability
Full text available
Date Issued
1962-06
Provenance
Lockheed Martin Missiles & Fire Control
Type
report
Format
1 online resource
Creator
Langley, Robert C.
Media
ASDTDR62-092part01.pdf