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

A technology of ethanol solution and ethanol water solution, which is applied in the field of materials, can solve problems such as the environmental hazards of trifluoroacetic acid gas, and achieve the effects of good application prospects, good superconductivity, and shortened reaction time

Inactive Publication Date: 2013-10-16
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0049] Dissolve yttrium acetate and barium trifluoroacetate in deionized water. In order to accelerate the dissolution, heat the deionized water to 70~80°C to make yttrium-barium solution. The molar ratio of yttrium ion and barium ion in the yttrium-barium solution is 1: 2. Control the total concentration of yttrium ions and barium ions in the yttrium-barium solution to be 0.25mol / L;

[0050] The yttrium-barium solution is boiled until the total concentration of yttrium ion and barium ion in the yttrium-barium solution is 0.6mol / L;

[0051] Add dehydrated alcohol to the yttrium-barium solution that the total concentration of yttrium ion and barium ion is 0.6mol / L, form the yttrium-barium ethanol solution, control the total concentration of yttrium ion and barium ion in the yttrium-barium ethanol solution to be 0.3mol / L, Then boil until the total concentration of yttrium ion and barium ion is 0.6mol / L; repeat the operation of adding dehydrated alcohol and boiling again 4 times ...

Embodiment 2

[0063] Dissolve yttrium acetate and barium trifluoroacetate in deionized water. In order to accelerate the dissolution, heat the deionized water to 70~80°C to make yttrium-barium solution. The molar ratio of yttrium ion and barium ion in the yttrium-barium solution is 1: 2. Control the total concentration of yttrium ions and barium ions in the yttrium-barium solution to be 0.3mol / L;

[0064] The yttrium-barium solution is boiled until the total concentration of yttrium ion and barium ion in the yttrium-barium solution is 0.5mol / L;

[0065] Add dehydrated alcohol to the yttrium-barium solution that the total concentration of yttrium ion and barium ion is 0.5mol / L, form the yttrium-barium ethanol solution, control the total concentration of yttrium ion and barium ion in the yttrium-barium ethanol solution to be 0.25mol / L, Then boil until the total concentration of yttrium ion and barium ion is 0.5mol / L; repeat the operation of adding dehydrated alcohol and boiling again 5 times ...

Embodiment 3

[0073] Dissolve yttrium acetate and barium trifluoroacetate in deionized water. In order to accelerate the dissolution, heat the deionized water to 70~80°C to make yttrium-barium solution. The molar ratio of yttrium ion and barium ion in the yttrium-barium solution is 1: 2. Control the total concentration of yttrium ions and barium ions in the yttrium-barium solution to be 0.4 mol / L;

[0074] The yttrium-barium solution is boiled until the total concentration of yttrium ion and barium ion in the yttrium-barium solution is 0.8 mol / L;

[0075] Add dehydrated alcohol to the yttrium-barium solution that the total concentration of yttrium ion and barium ion is 0.8 mol / L, form yttrium-barium ethanol solution, control the total concentration of yttrium ion and barium ion in the yttrium-barium ethanol solution to be 0.4 mol / L, Then boil until the total concentration of yttrium ions and barium ions is 0.8 mol / L; repeat the operation of adding absolute ethanol and boiling again 6 times ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/12
Inventor 李英楠李凤华罗清威潘凯凯李荷慈宋丽
Owner NORTHEASTERN UNIV
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