Composition Control of Palladium-Sliver Alloy for Optical Fiber Hydrogen Sensor

Abstract:

The present work investigates diffusivity of hydrogen (H) in palladium-silver (Pd/Ag) over 300～1100K temperature range for Pd_100-xAg_x, X=0%～40% by using the Sievert Law. The silver in the Pd/Ag alloy has significantly higher diffusion as compared to pure Pd for hydrogen sensor, the addition of Ag reduces the critical temperature of α→Β phase transformations and also increases the solubility of H, and provides longer operational lifetime for hydrogen sensor. It was found that the diffusion coefficient of H in Pd/Ag alloy decreases with increasing Ag and with increasing temperature, the calculated diffusion coefficient of H in the Pd/Ag alloys were found to have a maximum at 24%～25% Ag.

• Periodical: Advanced Materials Research (Volumes 317-319)
• Pages: 1045-1049
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.317-319.1045
• Online since: August 2011
• Authors: Lu Jun Cui, Gang Zhang, Hui Chao Shang, You Ping Chen
• Keywords: Hydrogen Sensing, Hydrogen Sensor, Optical Fiber Bundle, Palladium Silver Alloy Sputtering

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