Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

High temperature thermometric phosphors for use in a temperature sensor

Patent ·
OSTI ID:871428
 [1];  [2];  [2];  [3]
  1. Knoxville, TN
  2. Oak Ridge, TN
  3. Earlysville, VA
+ Show Author Affiliations
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:
LOCKHEED MARTIN ENRGY SYST INC
DOE Contract Number:
AC05-84OR21400
Assignee:
Lockheed Martin Energy Systems, Inc. (Oak Ridge, TN)
Patent Number(s):
US 5730528
OSTI ID:
871428
Country of Publication:
United States
Language:
English

References (5)

Characterization of high-temperature thermographic phosphors: spectral properties of LuPO_4:Dy(1%),Eu(2%) journal January 1995
Lanthanide Orthophosphates as a Matrix for Solidified Radioactive Defense and Reactor Wastes journal January 1981
Raman spectra of the rare earth orthophosphates journal August 1981
The observation by EPR of trivalent hafnium in LuPO 4 , YPO 4 , and ScPO 4 journal September 1985
Emission properties of europium-doped lanthanum and lutetium orthophosphate crystals for use in high temperature sensor applications conference January 1989

Similar Records

High temperature thermometric phosphors
Patent · Mon Mar 22 23:00:00 EST 1999 · OSTI ID:872206
High temperature thermometric phosphors for use in a temperature sensor
Patent · Mon Mar 23 23:00:00 EST 1998 · OSTI ID:597136
High temperature thermometric phosphors
Patent · Mon Mar 22 23:00:00 EST 1999 · OSTI ID:335490

Related Subjects

/374/250/
20
article
beam-splitting
calculated
caused
causing
consists
consists essentially
contact
detected
determined
dopant
dopent
dysprosium
emission
emissions
environment
essentially
eu
europium
excited
filtered
fluoresce
focused
formula
formula lupo
intensities
intensity
laser
ltoreq
lupo
material
measured
mirror
optically
phosphor
phosphor consists
phosphors
placed
ratio
sensor
separate
separated
separates
temperature
temperature ph
temperature phosphor
temperature sensor
temperature thermometric
thermometric
thermometric phosphors
wt