Preparation of Coated Conductors With Fluorine-Free CSD Method

Abstract

Preparation of new architectures of coated conductors (CCs) with fluorine-free chemical solution deposition (CSD) method has been presented. Multifunctional buffer layers, such as <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="TeX">$\hbox{Sm}_{0.2}\hbox{Ce}_{0.8}\hbox{O}_{1.9-{\rm x}}$</tex-math></inline-formula> , <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="TeX">$\hbox{SmBiO}_{3}/\hbox{NiO} $</tex-math></inline-formula> (200) have been fabricated via polymer-assisted chemical solution deposition (PACSD) method and surface oxidation epitaxial method. <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="TeX">$\hbox{YBa}_{2}\hbox{Cu}_{3}\hbox{O}_{7} $</tex-math></inline-formula> (YBCO) superconducting layers have been prepared by partial-melting process. A full process of making CCs using fluorine-free all-CSD method has been demonstrated on reel-to-reel facilities via slot-die coating and drying technology. Long CCs with critical current density <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="TeX">$J_{c}&gt;1\ \hbox{MA/cm}^{2} $</tex-math></inline-formula> at 77 K in self-field have been fabricated, demonstrating the feasibility of the full CSD technology in making quality CCs.