Emittance theory for thin film selective emitter

descriptionPublicationkeyboard_double_arrow_right Article , Other literature type 01 Jan 1995Publisher:AIPJournal:AIP Conference Proceedings, volume 321, pages 229-244 (issn: 0094-243X,

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Authors: Donald L. Chubb; Roland A. Lowe; Brian S. Good;

doi: 10.1063/1.47026

Emittance theory for thin film selective emitter

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Abstract

Thin films of high temperature garnet materials such as yttrium aluminum garnet (YAG) doped with rare earths are currently being investigated as selective emitters. This paper presents a radiative transfer analysis of the thin film emitter. From this analysis the emitter efficiency and power density are calculated. Results based on measured extinction coefficients for erbium-YAG and holmium-YAG are presented. These results indicated that emitter efficiencies of 50 percent and power densities of several watts/sq cm are attainable at moderate temperatures (less than 1750 K).

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