28 April 2010 Proton conducting perovskite-type ceramics for fiber optic sensors for hydrogen monitoring at high temperature
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Abstract
A fiber optical sensor has been developed by coating proton conducting perovskite oxide (Sr(Ce0.8Zr0.1)Y0.1O2.95, SCZY) thin film on the long-period fiber grating (LPFG) for high temperature in situ measurement of bulk hydrogen in gas mixtures relevant to the fossil- and biomass-derived syngas. In this paper, we investigate in the H2-sensing mechanism of the SCZY-LPFG sensor. The high temperature H2 adsorbance in the SCZY, the SCZY electric conductivity in H2, and the resonant wavelength shift of the SCZY-LPFG (ΔλR,H2) have been experimentally studied to understand the effect of operation temperature on the sensor's sensitivity to H2. Because of the activation process of the H2 reaction with the perovskite oxide, increasing temperature benefits the H2 uptake in the SCZY phase and the sensitivity of the SCZY-LPFG sensor. However, the thermal stability of the LPFG and the microstructure of the SCZY nanocrystalline film limit the application temperature of the fiber optic sensor.
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Xiling Tang, Kurtis Remmel, Daniel Sandker, Zhi Xu, Junhang Dong, "Proton conducting perovskite-type ceramics for fiber optic sensors for hydrogen monitoring at high temperature", Proc. SPIE 7682, Photonic Microdevices/Microstructures for Sensing II, 76820L (28 April 2010); doi: 10.1117/12.850919; https://doi.org/10.1117/12.850919
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