High temperature superconducting material and method for preparing high temperature superconducting material

Abstract

The invention discloses high temperature superconducting material and a method for preparing the high temperature superconducting material. The high temperature superconducting material is composed of yttrium, aluminum, nickel, lithium, zinc, barium and boron of which the molar ratio is 1:6-9:1-3:2-6:3-6:1.5:1-2. The preparation method comprises the steps that 1) a nitrate mixed solution is prepared; 2) citric acid is added in the nitrate mixed solution; 3) heating concentration is performed on the mixed solution obtained in the step 2) until gel is completely combusted so that powder material is formed; 4) powder is evenly ground; and 5) the ground powder is put in a high temperature furnace for calcining and then taken out after cooling to room temperature so that superconducting material is obtained. A sol-gel method and a high temperature calcining method are adopted for preparation so that the homogeneous superconducting material is formed, the defect of low critical temperature of the existing superconducting material can be solved, the superconducting material having higher critical temperature is prepared, and the superconducting material has the superconductivity under the condition of high temperature.

Description

technical field [0001] The invention relates to the technical field of new materials, specifically, a high-temperature superconducting material and a method for preparing the high-temperature superconducting material. Background technique [0002] A superconducting material refers to a material that exhibits the properties of zero resistance and repelling magnetic lines of force under certain low temperature conditions. It has been found that 28 kinds of elements and thousands of alloys and compounds can become superconductors. [0003] The technical principle of superconducting materials is as follows: [0004] 1) Zero resistance: [0005] In the superconducting state, superconducting materials have zero electrical resistance and can transmit electrical energy without loss. If a magnetic field is used to induce a current in the superconducting loop, this current can be maintained without decay. This "persistent current" has been observed experimentally many times. [0...

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Problems solved by technology

[0017] The purpose of the present invention is to design a high-temperature superconducting material and a method for preparing the high-temperature superconducting material, which uses metal oxides to form the high-temperature superconducting material, solves the disadvantages of the existing superconducting material with low critical temperature, and prepares a high-temperature superconducting material with high The critical temperature superconducting material has superconducting properties under relatively high temperature conditions. Another object of the present invention is to prepare this superconducting material by using sol-gel method and high-temperature calcination method to form homogeneous superconducting material