Rare earth element doped ceramics and their lifetime characteristics with varying temperature

M. S. Majewski, E. H. Jordan, M. W. Renfro

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The fluorescent lifetimes and emission spectra of rare-earth doped ceramic materials are known to vary with temperature and several existing thermographic phosphors take advantage of this response. The behavior of three of these materials: magnesium flurogermanate (Mg4FGeO6:Mn), europium doped yttria oxide (Eu:Y2O3) and dysprosium doped ytrria alumina garnet (Dy:YAG) have been assessed and quantified as a function of temperature. The lifetimes of Mg4FGeO6:Mn and Eu:Y 2O3 decrease at lower temperatures than Dy:YAG. This behavior and the relatively larger signal to noise ratio exhibited by Dy:YAG at high temperatures, highlight Dy:YAG as a candidate for incorporation into a high temperature measurement system. Laser induced fluorescent decays initiated by an ultraviolet laser of Dy:YAG are presented for two concentrations of dopant levels. A method for temperature sensing using spectral form matching is shown for temperatures from 25 to 900 degrees Celsius.

Original languageEnglish
Title of host publication46th AIAA Aerospace Sciences Meeting and Exhibit
DOIs
StatePublished - 2008

Publication series

Name46th AIAA Aerospace Sciences Meeting and Exhibit

ASJC Scopus subject areas

  • Aerospace Engineering

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