SrZrO3 doped YBCO thin film and preparation method thereof

Abstract

A SrZrO3 doped YBCO film and a preparation method thereof belong to the technology field of the preparation of the superconducting material with high-temperature coat. The original PLD method has the defect that the equipment is complicated, the cost is high and the proportion of the dopant is not easy to control. The film provided by the invention consists of 1 to 15 molar percent of SrZrO and 85 to 99molar percent of YBCO. The invention prepares YBCO precursor solution by the deposition method of trifluoroacetic acid and metal-organic compound; the YBCO precursor solution and the propionatesolution comprising strontium acetate and zirconium acetylacetone are mixed to obtain the SrZrO3 doped YBCO precursor solution; then the SrZrO3 doped YBCO precursor solution is spin-coated or dip-coated on the base, and the base is sintered under the wet oxygen atmosphere and below 400 DEG C; finally the base is high-temperature sintered under the wet ArO2 mixing atmosphere and between 750 to 850DEG C to obtain the SrZrO3 doped YBCO film. The film of the invention has the advantages of higher critical current density, higher critical conversion temperature and biaxial texture in the magneticfiled, simple equipment and low cost.

Description

technical field [0001] The invention belongs to the technical field of high-temperature superconducting material preparation, and in particular relates to the preparation technology of high-temperature superconducting coating conductor superconducting film. Background technique [0002] With the deepening of laboratory research, the practical application of YBCO superconducting materials is approaching. However, to really achieve practical application, it is not only required to have a high current-carrying capacity (I c ), and maintain high superconducting properties as much as possible at high temperature and high field. At present, people have been able to prepare I c The YBCO thick film up to 1200A / cm-Width is enough to meet the requirements of the application under zero field. However, with the increase of the magnetic field, the flux creep is gradually intensified, and the J of the YBCO film c Decreases exponentially, so only by increasing the thickness of the film...

AI Technical Summary

Problems solved by technology

Many research groups have successfully used the PLD method to prepare YBCO films doped with perovskite structure materials and rare earth oxide nanoparticles. High vacuum is required, not only the equipment is complicated, the cost is high, the most important thing is that it cannot flexibly change the dopant ratio, and it is not suitable for the development of practical high-temperature superconducting long strips

Compared with the PLD physical method, the MOD method has simple coating equipment, no vacuum, fast deposition speed, and is easy to make long strips. It has been widely used to prepare pure high-performance YBCO films, but the MOD method is used to prepare doped YBCO films. There are few studies

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