Title :
Comparison between thin film and bonded powder phosphors for thermographic sensing in gas turbine engines
Author :
McClean, Ian P. ; Simons, Andrew J. ; Thomas, Clive B. ; Mutton, John E.
Author_Institution :
Dept. of Electr. & Electron. Eng., Trent Univ., Nottingham, UK
fDate :
2/1/2000 12:00:00 AM
Abstract :
Measurements of YVO4:Eu in the form of a thin film and bonded powder, before and after testing in a Rolls-Royce gas turbine engine, indicate that the durability of the thin film was markedly better than that of the bonded powder; there was a 500% increase in loss for the bonded powder. Both thin films and bonded powders showed excellent reproducibility for photoluminescent (PL) decay-time temperature measurement. However, for the thin film, the useful temperature range (660-800 K) and sensitivity (18.4 mK-1) were much better than the bonded powder (700-800 K and 14.6 mK-1 ). Evidence here clearly implies that thin films have much better properties for long lifetime thermographic sensing at high temperatures
Keywords :
europium; gas turbines; high-temperature techniques; phosphors; photoluminescence; powders; radiative lifetimes; spectral methods of temperature measurement; temperature sensors; thin films; yttrium compounds; 660 to 800 K; PL decay-time temperature measurement; YVO4:Eu; bonded powder phosphor; durability; gas turbine engines; high temperatures; long lifetime sensing; remote sensing; reproducibility; sensitivity; thermographic sensing; thin film phosphor; Bonding; Engines; Loss measurement; Phosphors; Powders; Reproducibility of results; Temperature sensors; Testing; Transistors; Turbines;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
