Development of Ba–Zr–O-Doped Y–Gd–Ba–Cu–O Coated Conductors Using a Reel-to-Reel System Furnace

We designed and developed a novel reel-to-reel system furnace for fabricating high-performance superconducting tapes. Using the new furnace, long-length BaZrO
₃
-doped Y
_0.77
Gd
_0.23
Ba
₂
Cu
₃
O
_y
((Y,Gd)BCO + BZO) coated conductors (CCs) were fabricated through trifluoroacetate-based metal–organic deposition. The long-length CCs had highly uniform
I
_c
distribution in a self-field and in-field. The average critical currents through a 100 m-long (Y,Gd)BCO + BZO CCs at 77 K (measured with the Tapestar
^TM
system) were 165.2 and 43.4 A/4-mm-width in a self-field and at 1 T, respectively.