Chapter 117 - Dip-coated YBa2Cu3O7−x films on Ag substrate by MOD method

Abstract

This chapter explores a triple coated film on Ag {110} <110> textured polycrystalline substrate by optimizing the condition of heat treatments in the multicoating method. The metal organic deposition (MOD) process of YBCO using metal trifluoroacetates precursors is considered to be a strong candidate as a low cost process of coated conductors, since the TFA-MOD process is basically a non vacuum method. Additionally, it has been well confirmed that this process has an advantage to provide a high Jc film of the MA/cm2 class on the single crystal substrates such as LaAlO3 and SrTiO3 and on the Ni tapes with multi buffer-layer. The MOD process of YBa2Cu3O7-x (YBCO) using metal trifluoroacetates (TFA) precursors is considered to be a strong candidate as a low cost fabrication process in coated conductors since the TFA-MOD process is a non vacuum process and can provide high Jc films. Metal organic deposition using trifluoroacetates (TFA-MOD) with dip coating is applied for the preparation of YBCO films. The thickness of films increases with the withdrawal speed of substrates. The mechanically polished Ag substrates are better for the growth of YBCO films than unpolished Ag substrates. The sol solution should be laid aside for several days to coat YBCO films well. However, considering the future engineering application, it is further required to optimize TFA-MOD method to improve Jc of YBCO films.