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Proceedings Paper

Optical Properties Of Solid Particle Receiver Materials II: Diffuse Reflectance Of Norton Masterbeads® At Elevated Temperatures
Author(s): K. A. Stahl; J. W. Griffin; R. B. Pettit
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Paper Abstract

An experimental system to measure the diffuse reflectance of a particulate sample over the wavelength range of 300 to 2500 nm at elevated temperatures up to 1000°C has been developed and implemented. A description of the experimental apparatus and measurement procedures, as well as optical reflectance data for the Masterbeadse, are presented. Using the high temperature measurement system, the diffuse reflectance of Masterbeads® changed by less than 1% for sample temperatures from 150°C to 930°C. However, after heating a sample for three hours at 1000°C in air, the solar absorptance measured at room temperature decreased from an initial value of 0.93 to 0.89.

Paper Details

Date Published: 2 December 1985
PDF: 6 pages
Proc. SPIE 0562, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion IV, (2 December 1985); doi: 10.1117/12.966311
Show Author Affiliations
K. A. Stahl, Pacific Northwest Laboratory (United States)
J. W. Griffin, Pacific Northwest Laboratory (United States)
R. B. Pettit, Sandia National Laboratories (United States)


Published in SPIE Proceedings Vol. 0562:
Optical Materials Technology for Energy Efficiency and Solar Energy Conversion IV
Carl M. Lampert, Editor(s)

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