Fiber Optical Micro-Detectors for Oxygen Sensing in Power Plants Progress Report

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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 … continued below

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16 pages

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Baker, Gregory L.; Ghosh, Ruby N. & III, D.J. Osborn April 2004.

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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.

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16 pages

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OSTI as DE00824013

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  • April 2004

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  • Dec. 3, 2015, 9:30 a.m.

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  • Dec. 11, 2024, 6:41 p.m.

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Baker, Gregory L.; Ghosh, Ruby N. & III, D.J. Osborn. Fiber Optical Micro-Detectors for Oxygen Sensing in Power Plants Progress Report, report, April 2004; United States. (https://digital.library.unt.edu/ark:/67531/metadc782600/: accessed April 27, 2025), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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