Method for preparing YBCO (yttrium barium copper oxide) film by taking ethanol as solvent through low-fluorine MOD (metal organic deposition) method

Abstract

The invention discloses a method for preparing a YBCO (yttrium barium copper oxide) film by taking ethanol as a solvent through a low-fluorine MOD (metal organic deposition) method, and belongs to the technical field of materials. The method comprises the following steps: (1) dissolving yttrium acetate and barium trifluoroacetate in water to prepare a yttrium barium solution, boiling and concentrating; (2) adding ethanol, boiling and concentrating; (3) repeating the step (2) for 4-6 times to prepare a yttrium barium ethanol solution; (4) dissolving copper isocaprylate in ethanol to prepare a copper ethanol solution; (5) mixing the copper ethanol solution with the yttrium barium ethanol solution, filtering, reheating and concentrating to prepare a precursor solution; (6) applying the precursor solution to a substrate by spin coating, pyrolyzing and crystallizing. The method has the advantages of low environmental pollution, high production efficiency and the like, and has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a method for preparing YBCO membranes by using ethanol as a solvent and a low-fluorine MOD method. Background technique [0002] YB 2 Cu 3 o 7-x (YBCO) film is a promising high-temperature superconducting material, which has broad application prospects in electronic devices and other fields; superconducting motors, superconducting strong magnets and high-temperature super tapes, etc., developed based on YBCO film-making technology, It has received more and more attention from research groups in various countries. [0003] There are many methods for preparing YBCO membranes, which can be roughly divided into two categories: physical methods and chemical methods. Physical methods mainly include pulsed laser deposition (PLD, Pulsed Laser Deposition), ion beam assisted deposition (IBAD, ion beam assisted deposition), direct current sputtering (DCS, direct current sp...

AI Technical Summary

Problems solved by technology

[0004] The traditional TFA-MOD method is to use the acetate of yttrium, barium and copper as the starting material, mix according to the ratio of metal ions 1:2:3, add enough trifluoroacetic acid to convert it into trifluoroacetate; The trifluoroacetate salt of barium and copper is dissolved in methanol and undergoes several vacuum distillations to obtain a precursor solution, and then the precursor solution is coated on the sample sheet to make a YBCO superconducting film through heat treatment; during the preparation process of the precursor solution, due to Acetate is converted into trifluoroacetic acid, and the water and acetic acid produced must be removed through repeated distillation with a large amount of methanol. The produced methanol vapor and trifluoroacetic acid gas are harmful to the environment

Images