Title :
Emission properties of europium-doped lanthanum and lutetium orthophosphate crystals for use in high temperature sensor applications
Author :
Bugos, A.R. ; Allison, S.W. ; Cates, M.R.
Author_Institution :
Dept. of Electr. Eng., Tennessee Univ., Knoxville, TN, USA
Abstract :
The emission properties of two crystalline europium-activated thermographic phosphors, lanthanum phosphate (LaPO4:Eu3+ ) and lutetium phosphate (LuPO4:Eu3+) were investigated for potential use in high-temperature remote thermometry applications. Emission and excitation spectra were taken for both crystals at room temperature and at elevated temperatures. In the excitation spectra taken from room temperature to approximately 400°C, lanthanum phosphate and lutetium phosphate exhibit a significant temperature-dependent shift in their charge-transfer absorption bands
Keywords :
electric sensing devices; europium; lanthanum compounds; luminescence of inorganic solids; lutetium compounds; phosphors; thermometers; 20 to 400 degC; LaPO4:Eu3+; LuPO4:Eu3+; charge-transfer absorption bands; emission properties; excitation spectra; high temperature sensor applications; high-temperature remote thermometry applications; temperature-dependent shift; thermographic phosphors; Absorption; Ceramics; Crystalline materials; Crystallization; Crystals; Fluorescence; Lanthanum; Phosphors; Temperature measurement; Temperature sensors;
Conference_Titel :
Southeastcon '89. Proceedings. Energy and Information Technologies in the Southeast., IEEE
Conference_Location :
Columbia, SC
DOI :
10.1109/SECON.1989.132395
