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Title: High temperature thermometric phosphors

Abstract

A high temperature phosphor consists essentially of a material having the general formula LuPO.sub.4 :Dy.sub.(x),Eu.sub.y) wherein: 0.1 wt %.ltoreq.x.ltoreq.20 wt % and 0.1 wt %.ltoreq.y.ltoreq.20 wt %. The high temperature phosphor is in contact with an article whose temperature is to be determined. The article having the phosphor in contact with it is placed in the environment for which the temperature of the article is to be determined. The phosphor is excited by a laser causing the phosphor to fluoresce. The emission from the phosphor is optically focused into a beam-splitting mirror which separates the emission into two separate emissions, the emission caused by the dysprosium dopant and the emission caused by the europium dopent. The separated emissions are optically filtered and the intensities of the emission are detected and measured. The ratio of the intensity of each emission is determined and the temperature of the article is calculated from the ratio of the intensities of the separate emissions.

Inventors:
 [1];  [2];  [2];  [3]
  1. (Knoxville, TN)
  2. (Oak Ridge, TN)
  3. (Earlysville, VA)
Publication Date:
Research Org.:
LOCKHEED MARTIN ENRGY SYST INC
OSTI Identifier:
872206
Patent Number(s):
US 5885484
Application Number:
08/933916
Assignee:
Lockheed Martin Energy Research Corp. (Oak Ridge, TN) ORNL
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
temperature; thermometric; phosphors; phosphor; consists; essentially; material; formula; lupo; eu; wt; ltoreq; 20; contact; article; determined; placed; environment; excited; laser; causing; fluoresce; emission; optically; focused; beam-splitting; mirror; separates; separate; emissions; caused; dysprosium; dopant; europium; dopent; separated; filtered; intensities; detected; measured; ratio; intensity; calculated; consists essentially; temperature phosphor; thermometric phosphors; temperature thermometric; formula lupo; temperature ph; phosphor consists; /252/

Citation Formats

Allison, Stephen W., Cates, Michael R., Boatner, Lynn A., and Gillies, George T.. High temperature thermometric phosphors. United States: N. p., 1999. Web.
Allison, Stephen W., Cates, Michael R., Boatner, Lynn A., & Gillies, George T.. High temperature thermometric phosphors. United States.
Allison, Stephen W., Cates, Michael R., Boatner, Lynn A., and Gillies, George T.. Tue . "High temperature thermometric phosphors". United States. doi:. https://www.osti.gov/servlets/purl/872206.
@article{osti_872206,
title = {High temperature thermometric phosphors},
author = {Allison, Stephen W. and Cates, Michael R. and Boatner, Lynn A. and Gillies, George T.},
abstractNote = {A high temperature phosphor consists essentially of a material having the general formula LuPO.sub.4 :Dy.sub.(x),Eu.sub.y) wherein: 0.1 wt %.ltoreq.x.ltoreq.20 wt % and 0.1 wt %.ltoreq.y.ltoreq.20 wt %. The high temperature phosphor is in contact with an article whose temperature is to be determined. The article having the phosphor in contact with it is placed in the environment for which the temperature of the article is to be determined. The phosphor is excited by a laser causing the phosphor to fluoresce. The emission from the phosphor is optically focused into a beam-splitting mirror which separates the emission into two separate emissions, the emission caused by the dysprosium dopant and the emission caused by the europium dopent. The separated emissions are optically filtered and the intensities of the emission are detected and measured. The ratio of the intensity of each emission is determined and the temperature of the article is calculated from the ratio of the intensities of the separate emissions.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Mar 23 00:00:00 EST 1999},
month = {Tue Mar 23 00:00:00 EST 1999}
}

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