Abstract
1 cm ×12 cm rectangular YBCO films for fault current limiter devices were prepared by MOD. Usually, solution coating in MOD is carried out by spin coating. However, there are some problems associated with spin coating of large-size rectangular substrates. Namely, the maximum substrate dimension is limited by cup size and motor torque of the apparatus. It was found that wire-bar coating is a promising alternative; this method is more easily scaled up to a large size at lower cost. By both methods, YBCO films with high Jc's around 2 MA/cm2 were obtained on CeO2-buffered sapphire. So far, the uniformity of Jc in the YBCO films prepared by spin coating was better than those by wire-bar coating.
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