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Research Papers

Fabrication of Ba(Ce, Zr)0.9 Y0.1 O3-α Thin Film on a Dense Pd Substrate by Ultraviolet Metalorganic Deposition

[+] Author and Article Information
K. Asano

 Central Research Institute of Electric Power Industry, 2-6-1 Nagasaka, Yokosuka 240-0196, Japankoichi-a@criepi.denken.or.jp

Y. Kozawa

 Yokohama National University, 79-7 Tokiwadai, Hodogaya, Yokohama 240-8501, Japan

Y. Mugikura, T. Watanabe

Central Research Institute of Electric Power Industry, 2-6-1 Nagasaka, Yokosuka 240-0196, Japan;  Yokohama National University, 79-7 Tokiwadai, Hodogaya, Yokohama 240-8501, Japan

J. Fuel Cell Sci. Technol 8(6), 061015 (Sep 27, 2011) (4 pages) doi:10.1115/1.4004505 History: Received January 28, 2011; Revised June 27, 2011; Accepted June 30, 2011; Published September 27, 2011; Online September 27, 2011

The formation of dense thin films to obtain an intermediate temperature solid oxide fuel cell (IT-SOFC) that uses Ba(Ce1−x Zrx )0.9 Y0.1 O3−α (BCZYO, x = 0, 0.3, 1) as the proton conductor was attempted on a dense Pd substrate at low sintering temperatures by the metalorganic deposition (MOD) method. A BaCe0.9 Y0.1 O3−α (BCYO) thin film (thickness 0.8 μm) was prepared by MOD and then annealed at 850°C on a Pd substrate with low heat resistance. However, there are problems such as the very low density of the BCYO film and the presence of a PdO interlayer between the film and the Pd substrate. The densification of the crystallized BCYO thin film, which is about 0.5-μm thick, was improved by introducing a UV-assisted MOD process. Rapid thermal annealing (RTA) eliminated the PdO interlayer. In addition, the formation of dense thin films of BCZYO was achieved by the same UV-MOD (RTA) method. Therefore, the successful application of UV-MOD (RTA) to the formation of BCZYO thin films at low sintering temperatures was established.

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Copyright © 2011 by American Society of Mechanical Engineers
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Figures

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Figure 1

XRD patterns of the BCYO films on a Pd substrate prepared by eight times repetition of spin coating and annealing at (a) 550, (b) 650, (c) 750, and (d) 850 °C for 30 min in air

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Figure 2

Cross-sectional images (a) SEM and (b) BSE of the BCYO film on a Pd substrate prepared by MOD at 850 °C

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Figure 3

Schematic diagram of UV-assisted metalorganic deposition (MOD) method

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Figure 4

XRD patterns of BCYO films on a Pd substrate prepared by UV-MOD and annealed at (a) 650, (b) 750, (c) 850 °C for 30 min in air, and (d) prepared by UV-MOD (RTA) and annealed at 850 °C for 10 min in air

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Figure 5

Cross-sectional BSE images of thin films prepared by (a) MOD, (b) UV-MOD, and (c) UV-MOD (RTA) on a Pd substrate at 850 °C

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Figure 6

XRD patterns of Ba(Ce1-x Zrx )0.9 Y0.1 O3-α films: x = (a) 0, (b) 0.3, (c) 1 on a Pd substrate, prepared by UV-MOD (RTA) annealed at 850 °C, for 10 min in air; and (d) Pd substrate

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Figure 7

Cross-sectional BSE images of BCZYO thin films: x = (a) 0, (b) 0.3, and (c) 1 prepared by UV-MOD (RTA) on a Pd substrate at 850 °C

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