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Preparation method for synthesizing T1-2212 superconducting thin film by employing sol-gel method

A technology of tl-2212 and superconducting thin film, which is applied in the usage of superconducting elements, etc., can solve the problems of difficulty in preparing high-quality Tl-2212 thin film and lack of Tl-2212 thin film, and achieve good superconducting characteristics and low production cost , good chemical stability

Inactive Publication Date: 2013-09-18
GUANGXI TEACHERS EDUCATION UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This shows that the two chemical methods currently used are difficult to prepare high-quality Tl-2212 films, and additional chemical methods are required to prepare
[0006] Sol-gel method (sol-gel) and metal-organic chemical deposition method (MOD) are commonly used chemical methods for preparing thin films. They are not much different from the preparation process. However, there is still a lack of application of these two methods to prepare Tl- 2212 Thin Film Research

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  • Preparation method for synthesizing T1-2212 superconducting thin film by employing sol-gel method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Preparation of 104K Tl-2212 Superconducting Thin Film

[0034] 1. Sol preparation process

[0035] 1. Using thallium acetate, barium acetate, calcium acetate, and copper acetate as starting materials, lactic acid, α-methacrylic acid, diethylenetriamine, triethylenetetramine, and methanol as complexing agents and solvents to prepare sols. The active ingredients and molar ratio of the metal compound are: Thallium acetate: Barium acetate: Calcium acetate: Copper acetate=2.6:2:1:2.5.

[0036] 2. Add lactic acid, diethylenetriamine and methanol to thallium acetate, the molar ratio of each component is thallium acetate: lactic acid: diethylenetriamine: methanol = 1:2.5:2.5:70, and stir at 70°C to obtain solution A.

[0037] 3. Add lactic acid and methanol to barium acetate, the molar ratio of each component is barium acetate: lactic acid: methanol = 1:3:40, and stir at 80°C to obtain solution B.

[0038] 4. Add lactic acid and methanol to calcium acetate, the molar ratio of...

Embodiment 2

[0048] Preparation of 106K Tl-2212 Superconducting Thin Film

[0049] 1. Sol preparation process

[0050] 1. Using thallium acetate, barium acetate, calcium acetate, and copper acetate as starting materials, lactic acid, α-methacrylic acid, diethylenetriamine, triethylenetetramine, and methanol as complexing agents and solvents to prepare sols. The active ingredients and molar ratio of the metal compound are: Thallium acetate: Barium acetate: Calcium acetate: Copper acetate=3:2:1:2.7.

[0051] 2. Add lactic acid, diethylenetriamine and methanol to thallium acetate, the molar ratio of each component is thallium acetate: lactic acid: diethylenetriamine: methanol = 1:3.5:3.5:85, and stir at 70°C to obtain solution A.

[0052] 3. Add lactic acid and methanol to barium acetate, the molar ratio of each component is barium acetate: lactic acid: methanol = 1:2.5:50, and stir at 80°C to obtain solution B.

[0053] 4. Add lactic acid and methanol to calcium acetate, the molar ratio of...

Embodiment 3

[0063] Preparation of 103K Tl-2212 Superconducting Thin Film

[0064] 1. Sol preparation process

[0065] 1. Using thallium acetate, barium acetate, calcium acetate, and copper acetate as starting materials, lactic acid, α-methacrylic acid, diethylenetriamine, triethylenetetramine, and methanol as complexing agents and solvents to prepare sols. The active ingredients and molar ratio of the metal compound are: Thallium acetate: Barium acetate: Calcium acetate: Copper acetate=3.5:2:1:2.5.

[0066] 2. Add lactic acid, diethylenetriamine and methanol to thallium acetate, the molar ratio of each component is thallium acetate: lactic acid: diethylenetriamine: methanol = 1:3.5:3.5:80, and stir at 70°C to obtain solution A.

[0067] 3. Add lactic acid and methanol to barium acetate, the molar ratio of each component is barium acetate: lactic acid: methanol = 1:3.5:60, and stir at 80°C to obtain solution B.

[0068] 4. Add lactic acid and methanol to calcium acetate, the molar ratio ...

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Abstract

The invention discloses a preparation method for synthesizing a T1-2212 superconducting thin film by employing a sol-gel method. The method comprises the following steps: by taking thallium acetate, barium acetate, calcium acetate and copper acetate as initial raw materials, by taking lactic acid, alpha-methacrylic acid, diethylenetriamine, triethylene tetramine and methanol as complexing agents and solvents, and preparing the sol with proper viscosity. The sol has the characteristics of fewer materials, simple preparation process and easily and accurately controlled components; the T1-2212 superconducting thin film prepared by employing the sol has flat surface topography and good superconducting characteristics.

Description

technical field [0001] The invention relates to a method for a superconducting thin film material, in particular to a preparation method for synthesizing a T1-2212 superconducting thin film by a sol-gel method. Background technique [0002] Tl 2 Ba 2 CaCu 2 o 8 (Tl-2212) The critical temperature of the superconducting film is high (T c Generally 105-110K), with stable structure and strong moisture resistance, it is one of the two practical high-temperature superconducting films at present, and is an important material for preparing passive devices such as high-temperature superconducting filters. [0003] Since the phase formation temperature of Tl-2212 superconducting thin film is higher than that of Tl 2 o 3 Therefore, the preparation of Tl-2212 superconducting thin films generally adopts a two-step process. Firstly, it is necessary to prepare a Tl-containing or Tl-free precursor film, and then perform a post-annealing Tl treatment to convert it into a Tl-2212 phase...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/45C04B35/622
CPCY02E40/60
Inventor 谢清连黄国华张晶李建映
Owner GUANGXI TEACHERS EDUCATION UNIV
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