METHODS OF SPLICING 2G REBCO HIGH TEMPERATURE SUPERCONDUCTORS USING PARTIAL MICRO-MELTING DIFFUSION PRESSURIZED SPLICING BY DIRECT FACE-TO-FACE CONTACT OF HIGH TEMPERATURE SUPERCONDUCTING LAYERS AND RECOVERING SUPERCONDUCTIVITY BY OXYGENATION ANNEALING

摘要

Disclosed is a method for bonding a ReBCO high temperature superconductor with excellent superconductivity retentive properties after bonding. According to the present invention, the method for bonding a ReBCO high temperature superconductor comprises: (a) a step for preparing two strands of ReBCO high temperature superconductors, each including ReBCO high temperature superconductor layers; (b) a step for processing a hole in each joint part of the ReBCO high temperature superconductor; (c) a step for exposing the ReBCO high temperature superconductor layers of each joint part of the ReBCO high temperature superconductors by etching; (d) a step for arranging the ReBCO high temperature superconductors so that each exposed side of the ReBCO high temperature superconductor layers are directly in contact with each other, or for arranging the ReBCO high temperature superconductors so that each exposed side of the ReBCO high temperature superconductor layers is in contact with an exposed side of the ReBCO high temperature superconductor layer of a third ReBCO high temperature superconductor; (e) a step for maintaining a vacuum state inside a heat treating furnace after inserting the ReBCO high temperature superconductor into the heat treating furnace; (f) a step for pressure welding by melting and spreading a micro part of each exposed side of the ReBCO high temperature superconductor layers of the ReBCO high temperature superconductor by raising the temperature inside the heat treating furnace; (g) a step for supplying oxygen to each ReBCO high temperature superconductor layer of the ReBCO high temperature superconductors by heat treating a joint part of the ReBCO high temperature superconductor under the oxygen atmosphere; (h) a step for coating silver (Ag) in a joint part of the ReBCO high temperature superconductor; and (i) a step for strengthening the joint part of the ReBCO high temperature superconductor where silver is coated, with solder or epoxy. [Reference numerals] (AA) Start; (BB) End; (S310) Prepare a ReBCO high temperature superconductor; (S320) Process a hole in a joint part; (S330) Remove a stabilizing layer by etching; (S340) Arrange the ReBCO high temperature superconductor; (S350) Insert the ReBCO high temperature superconductor into a heat treating furnace and maintain a vacuum state inside the heat treating furnace; (S360) Pressure weld by melting and spreading a micro part of a surface of the ReBCO high temperature superconductor layer; (S370) Annealing for supplementing oxygen to the ReBCO high temperature superconductor layer; (S380) Coat Ag in a joint part; (S390) Strengthen the joint part