Hostname: page-component-586b7cd67f-g8jcs Total loading time: 0 Render date: 2024-11-25T15:38:23.160Z Has data issue: false hasContentIssue false
  • English
  • Français

Rare Earth Doped Yttrium Aluminium Garnet (YAG) Selective Emitters

Published online by Cambridge University Press:  10 February 2011

Donald L. Chubb ,
AnnaMaria T. Pal ,
Martin O. Patton  and
Phillip P. Jenkins
Donald L. Chubb
Affiliation:
National Aeronautics and Space Administration, Lewis Research Center, 21000 Brook Park Rd, Cleveland, Ohio 44135, [email protected]
AnnaMaria T. Pal
Affiliation:
Essential Research, Inc., 23811 Chagrin Blvd., Cleveland, Ohio 44122
Martin O. Patton
Affiliation:
Essential Research, Inc., 23811 Chagrin Blvd., Cleveland, Ohio 44122
Phillip P. Jenkins
Affiliation:
Essential Research, Inc., 23811 Chagrin Blvd., Cleveland, Ohio 44122
Get access

Abstract

As a result of their electron structure, rare earth ions in crystals at high temperature emit radiation in several narrow bands rather than in a continuous blackbody manner. This study presents a spectral emittance model for films and cylinders of rare earth doped yttrium aluminum garnets. Good agreement between experimental and theoretical film spectral emittances was found for erbium and holmium aluminum garnets. Spectral emittances of films are sensitive to temperature differences across the film. For operating conditions of interest, the film emitter experiences a linear temperature variation whereas the cylinder emitter has a more advantageous uniform temperature. Emitter efficiency is also a sensitive function of temperature. For holminum aluminum garnet film the efficiency is 0.35 at 1446K but only 0.27 at 1270 K.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 551: Symposium JJ – Materials in Space-Science, Technology & Exploration , 1998 , 107
Copyright
Copyright © Materials Research Society 1999

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1 Dieke, G.H., Spectra and Energy Levels of Rare Earth Ions in Crystals, Interscience, New York, 1968.Google Scholar
2 Guazzoni, G.E., Appl. Spectra. 26, 60, 1972.Google Scholar
3 Nelson, R.E., in Proceedings of the 32nd International Power Sources Symposium (Electronchemical Society, Pennington, NJ, 1986), pp. 95–101.Google Scholar
4 Parent, C.R. and Nelson, R.E., in Proceedings of the 21st Intersociety Energy Conversion (American Chemical Society, Washington, D.C., 1986), vol. 2, pp. 1314–1317.Google Scholar
5 Chubb, D.L., in Proceedings of the 21st Photovoltaic Specialists Conference (IEEE, New York, 1990), pp. 13226–1342; also NASA TM-103290.Google Scholar
6 Chubb, D.L., and Lowe, R.A., J. Appl. Phys., 74, 5687 (1993).Google Scholar
7 Lowe, R.A., Chubb, D.L., Farmer, S.C., and Good, B.S., Appl. Phys. Lett. 64, 3551, 1994.Google Scholar
8 Lowe, R.A., Chubb, D.L., and Good, B.S., in Proceedings of the First NREL Conference on Thermophotovoltaic Generation of Electricity, (American Institute of Physics Conference Proceedings 321, 1994), pp. 291–297.Google Scholar
9 Lowe, R.A., Chubb, D.L., and Good, B.S, in Proceedings of the First World Conference on Photovoltaic Energy Conversion, (IEEE, 1995).Google Scholar
10 Lowe, R.A., Good, B.S., and Chubb, D.L., in Proceedings of 30th Intersociety Energy Conversion Engineering Conference (IECEC), (American Society of Mechanical Engineers, 1995), vol. 2, pp. 511–515.Google Scholar
11 Chubb, D.L., Lowe, R.A., and Good, B.S., in Proceedings of The First NREL Conference on Thermophotovoltaic Generation of Electricity, (American Institute of Physics Conference Proceedings 321, 1994), pp. 229–244.Google Scholar
12 Good, B.S., Chubb, D.L., and Lowe, R.A., in Proceedings of The First NREL Conference on Thermophotovoltaic Generation of Electricity, (American Institute of Physics Conference Proceedings 321, 1994), pp. 263–275.Google Scholar
13 Chubb, D.L., Good, B.S., Clark, E.B., and Chen, Z., Effect of Temperature Gradient on Thick Film Selective Emitter Emittance, presented at The Third NREL Conference on Thermophotovoltaic Generation of Electricity, AIP Conference Proceedings 401, 1997.Google Scholar
14 Siegel, R. and Howell, J.R., Thermal Radiation Heat Transfer, 2nd edition, Washington, DC, Hemisphere, 1981, Chs. 4, 14.Google Scholar
15 Chubb, D.L., Pal, A.T., Patton, M.O., and Jenkins, P.R., “Rare Earth Doped High Temperature Ceramic Selective Emitters,” NASA TM-208491.Google Scholar
16 Chubb, D.L., “Emittance Theory for Cylindrical Fiber Selective Emitter,” NASA TM.Google Scholar
17 Lide, D.R., (Ed.), CRC Handbook of Chemistry and Physics, 71st ed., CRC Press, 1990.Google Scholar
18 Panitz, J.-C., Schubnell, M., Durisch, W., and Geiger, F., “Influence of Ytterbium Concentration on the Emissive Properties of Yb:YAG and Yb: Y2O3 ,” presented at The Third NREL Conference on Thermophotovoltaic Generation of Electricity, AIP Conference Proceedings 401, 1997.Google Scholar
19 Becker, F.E., Doyle, E.F., and Kailash, S., “Development of a Portable Thermophotovoltaic Power Generator in Proceedings of the Third NREL Conference on Thermophotovoltaic Generation of Electricity, AlP Proceedings 401, 1997, pp. 329–339.Google Scholar