Method for dynamically preparing RexCe1-xOy buffer layer long belt by using chemical solution

Abstract

The invention discloses a method for dynamically preparing an RexCe1-xOy buffer layer long belt by using a chemical solution. The method comprises the following specific steps: a, the preparation of a wet film: preparing a nitrate mixture in the ratio of rare earth ions and cerium ions, and dissolving the mixture in a polymer organic solvent to synthesize colloid; filling the colloid in a liquid storage tube, arranging a base belt on a pulling belt, driving the pulling belt with a stepping motor to move forward, driving and pressing the colloid with an upper stepping motor to coat on the base belt through a slit coating opening, forming the wet film; b, the preparation of a dry film: passing the coated wet film through a thermostatic infrared drying area and forming the dry film; and c, decomposition and phase formation: passing the dry film through a long-belt atmosphere multi-area temperature control furnace, passing the film through a 350-520 DEG C of decomposition area under the protection of the enough H2 / Ar reducing atmosphere in each temperature area, then passing the film through a 1000-1200 DEG C of crystalline area, finally passing the film through a cooling area, cooling the film along with the furnace to obtain the coated conductor RexCe1-xOy buffer layer long belt. Compared with the physical method, the method disclosed by the invention is easy and accessible in preparation technology, cheap and environment-friendly, and the RexCe1-xOy buffer layer long belt in any length of which critical thickness reaches 150-200nm can be obtained.

Description

technical field [0001] The invention belongs to the field of preparation of high-temperature superconducting strips, in particular to a chemical method for dynamically preparing long strips of coated conductor buffer layers Re x Ce 1-x o y thin film method. Background technique [0002] The second-generation high-temperature superconducting tape has broad application prospects in the fields of electric power, transportation, military and medicine due to its excellent intrinsic electromagnetic properties, especially its excellent current-carrying capacity under high magnetic field. [0003] The high-temperature superconducting coated conductor is composed of three parts: substrate, buffer layer, and superconducting layer. The material of the buffer layer not only serves as a growth template, but also acts as a barrier layer, which plays an important role. Currently, CeO 2 Because of its excellent matching with the superconducting layer and good chemical stability, it has ...

AI Technical Summary

Problems solved by technology

However, the vacuum deposition method requires high equipment prices and low film production efficiency, which is not conducive to the industrial development of strips, so it needs to be improved. Therefore, high manufacturing costs are the main factors restricting the large-scale application of high-temperature superconducting strips.

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