A kind of method of making rare earth barium copper oxide superconducting film

A technology of rare earth barium copper oxide and superconducting film, which is applied in the usage of superconducting elements, equipment for manufacturing conductive/semiconducting layers, superconducting devices, etc., and can solve problems such as control factors that do not consider temperature and film thickness

Active Publication Date: 2019-03-15
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing precursor solution coating process is coating at room temperature, without considering the control factor of temperature on film thickness

Method used

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  • A kind of method of making rare earth barium copper oxide superconducting film
  • A kind of method of making rare earth barium copper oxide superconducting film
  • A kind of method of making rare earth barium copper oxide superconducting film

Examples

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example 1

[0064] The preparation process is as figure 1 As shown, first, according to the metal cation molar ratio of 1: (1+x): 3 (where 0.5≤x≤1), yttrium acetate tetrahydrate, barium acetate, and copper acetate monohydrate were dissolved in deionized water, and trifluoroacetic acid was added thereto. After 2 times of rotary evaporation, the above-mentioned metal salt was finally dissolved in methanol to obtain a clear, transparent, dark blue precursor with a concentration of 1.5 mol / L.

[0065] Using an improved water bath, dip-coating was performed at temperatures of 0°C, 10°C, 20°C and 30°C, respectively, and the above precursor solution was coated on LaAlO 3 (lanthanum aluminate) single crystal substrate, and then placed in a tube furnace for rapid heat treatment, the YBCO precursor film can be obtained. The film section thickness was observed with a Hitachi Su8010 scanning electron microscope, and 5 values ​​were taken for each sample to eliminate errors. Dip-coating at differen...

example 2

[0068] According to a method of preparing a solution according to the embodiment, a precursor with a concentration of 1.8mol / L is prepared, and then the precursor is added with a mass fraction of 25% polyethylene glycol 2000 (PEG2000), and the modification is obtained after fully stirring, dissolving and standing. precursors. By improving the temperature control of the water bath, dip-coating was carried out at temperatures of 0°C, 10°C, 20°C and 30°C, respectively, and the above precursor solution was applied to LaAlO by dip-coating technology. 3 (lanthanum aluminate) single crystal substrate, and then placed in a tube furnace for rapid heat treatment, the YBCO precursor film can be obtained. The film section thickness was observed with a Hitachi Su8010 scanning electron microscope, and 5 values ​​were taken for each sample to eliminate errors. Dip-coating at different constant temperatures of 0°C, 10°C, 20°C, and 30°C, the thickness of the film is divided into 548nm, 493nm,...

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Abstract

The invention discloses a method for manufacturing a REBCO superconducting film and a constant-temperature dip-coating device. The method comprises the following steps: (A) preparing a precursor solution containing rare earth element ions, barium ions, copper ions and a solvent; (b) controlling a coating temperature by a constant temperature way with the temperature not higher than 20 DEG C, controlling a substrate and the precursor solution to be at same set temperatures, and coating the precursor solution on the substrate to obtain a precursor film; and (c), placing the precursor film in a heat treatment furnace and carrying out thermal decomposition, sintering and oxygenation steps to obtain an REBCO superconducting film. According to the invention, the coating temperature is controlled to be at a specific constant value, so that the thickness of the film increases.

Description

technical field [0001] The invention relates to a method and constant temperature dip coating equipment for making a rare earth barium copper oxide superconducting film. Background technique [0002] Rare earth barium copper oxide (REBa 1+x Cu 3 o 7-y , where RE is a rare earth element such as Y, Gd, Sm, etc., 0.5≤x≤1, 0<y<0.5) The high-temperature superconducting film is the core component of the second-generation high-temperature superconducting wire (also known as a coated conductor) part, it has a very high self-field critical current density (generally higher than 1MA / cm 2 ), and is suitable for applications in high magnetic field environments. The current technology for preparing high-temperature superconducting films mainly includes chemical solution deposition and some vacuum deposition methods. The chemical solution deposition technology is very beneficial to reduce production costs because it does not require expensive vacuum equipment, and the high-tempe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B12/06H01B13/00C23C18/12
CPCC23C18/1216C23C18/1291H01B12/06H01B13/00H01B13/0026Y02E40/60
Inventor 冯峰汪林立杨置荣卢弘愿瞿体明顾晨
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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