Radiative performance of rare earth garnet thin film selective emitters
- Kent State University, Kent, Ohio 44242 (United States)
- NASA Lewis Research Center, Cleveland, Ohio 44135 (United States)
In this paper we present the first emitter efficiency results for the thin film 40% Er-1.5% Ho YAG (Yttrium Aluminum Garnet, Y{sub 3}Al{sub 5}O{sub 12}) and 25% Ho YAG selective emitter at 1500 K with a platinum substrate. Spectral emittance and emissive power measurements were made (1.2{lt}{lambda}{lt}3.2 {mu}m). Emitter efficiency and power density are significantly improved with the addition of multiple rare earth dopants. Predicted efficiency results are presented for an optimized (equal power density in the Er, {sup 4}I{sub 15/2}{minus}{sup 4}I{sub 13/2} {at}1.5 {mu}m, and Ho, {sup 5}I{sub 7}{minus}{sup 5}I{sub 8} {at}2.0 {mu}m emission bands) Er-Ho YAG thin film selective emitter. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 165962
- Report Number(s):
- CONF-940101--
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 321; ISSN 0094-243X; ISSN APCPCS
- Country of Publication:
- United States
- Language:
- English
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