FIBER OPTICAL MICRO-DETECTORS FOR OXYGEN SENSING IN POWER PLANTS | |
Baker, Gregory L. ; Ghosh, Ruby N. ; III, D.J. Osborn | |
Michigan State University (United States) | |
关键词: Luminescence; On-Line Measurement Systems; Oxygen; Fiber Optics; Molybdenum Chlorides; | |
DOI : 10.2172/824013 RP-ID : NONE RP-ID : FC26-02NT41582 RP-ID : 824013 |
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美国|英语 | |
来源: UNT Digital Library | |
【 摘 要 】
A reflection mode fiber optic oxygen sensor that can operate at high temperatures for power plant applications is being developed. The sensor is based on the {sup 3}O{sub 2} quenching of the red emission from hexanuclear molybdenum chloride clusters. The luminescence of Mo{sub 6}Cl{sub 12} immobilized in a sol-gel matrix was measured as a function of heater temperature up to 200 C, in an inert environment. While the luminescence decreased with temperature, the integrated intensity at 200 C should be sufficient to enable detection of the luminescence in a fiber geometry. Previously we found that aging Mo{sub 6}Cl{sub 12} at temperatures above 250 C converts the canary yellow Mo{sub 6}Cl{sub 12} to a non-luminescent gray solid. Optical and thermal aging experiments show that the alkali metal salts of Mo{sub 6}Cl{sub 12} have higher thermal stabilities and remain luminescent after aging at 280 C.
【 预 览 】
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