High temperature thermometric phosphors

Patent · Tue Mar 23 00:00:00 EST 1999

OSTI ID:872206

Allison, Stephen W ^[1]; Cates, Michael R ^[2]; Boatner, Lynn A ^[2]; Gillies, George T ^[3]

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1. Knoxville, TN
2. Oak Ridge, TN
3. Earlysville, VA

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.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: AC05-84OR21400
• Assignee: Lockheed Martin Energy Research Corp. (Oak Ridge, TN)
• Patent Number(s): US 5885484
• Application Number: 08/933916
• OSTI ID: 872206
• Country of Publication: United States
• Language: English

Related Subjects

temperature
thermometric
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phosphor
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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
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