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Method for preparing single domain yttrium barium copper oxide superconduction block by top seed infiltration process

A technology of yttrium barium copper oxide and seed crystal infiltration, which is applied in the growth of polycrystalline materials, chemical instruments and methods, single crystal growth, etc., can solve the problems of high process cost and long preparation time, and achieve simplified experiment links and magnetic levitation Strong force, the effect of preventing the loss of liquid phase

Active Publication Date: 2015-05-13
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the technical problems of long preparation time and high process cost, the invention provides a kind of Only need to pre-prepare a BaCuO 2 The precursor powder can meet the needs of preparing solid-phase source and liquid-phase source powder, and the prepared single-domain yttrium-barium-copper-oxide superconducting block has high magnetic levitation force and is easy to grow directionally. Domain YBCO superconducting bulk method

Method used

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  • Method for preparing single domain yttrium barium copper oxide superconduction block by top seed infiltration process
  • Method for preparing single domain yttrium barium copper oxide superconduction block by top seed infiltration process
  • Method for preparing single domain yttrium barium copper oxide superconduction block by top seed infiltration process

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Experimental program
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Effect test

Embodiment 1

[0040] Based on the raw material Y 2 O 3 Taking the initial powder of the solid precursor powder as an example, the method of preparing monodomain yttrium-barium-copper-oxygen superconducting bulk material by the top seed crystal infiltration method consists of the following steps:

[0041] (1) Preparation of solid phase precursor powder

[0042] Take 106.9064g BaCO 3 Mix evenly with 43.0936g CuO at a molar ratio of 1:1, and make BaCuO by solid-state reaction method 2 Powder, will Y 2 O 3 Starting powder and BaCuO 2 The molar ratio of the powder is 1:1.2 and mixed, and 100g of the mixed powder is added to the ball mill and mixed to make (Y 2 O 3 +1.2BaCuO 2 ) Solid phase precursor powder;

[0043] (2) Preparation of liquid source powder

[0044] Take 106.9064g BaCO 3 It is mixed evenly with 43.0936g CuO at a molar ratio of 1:1, and sintered into BaCuO by solid-state reaction method 2 Powder, take 11.17g Y 2 O 3 Starting powder and 23.61g CuO, 115.21g BaCuO 2 The powder massage ratio is...

Embodiment 2

[0059] Based on the raw material Y 2 O 3 The powder is used as the initial powder of the solid-phase precursor powder as an example. The method of preparing monodomain yttrium-barium-copper-oxygen superconducting bulk material by the top seed crystal infiltration method consists of the following steps:

[0060] (1) Preparation of solid phase precursor powder

[0061] Take 106.9064g BaCO 3 Mix evenly with 43.0936g CuO at a molar ratio of 1:1, and make BaCuO by solid-state reaction method 2 Powder, will Y 2 O 3 Starting powder and BaCuO 2 The molar ratio of the powder is 1:1, and 100g of the mixed powder is added to the ball mill and mixed to make (Y 2 O 3 +BaCuO 2 ) Solid phase precursor powder;

[0062] (2) Preparation of liquid source powder

[0063] Take 106.9064g BaCO 3 It is mixed evenly with 43.0936g CuO at a molar ratio of 1:1 and sintered into BaCuO by solid-state reaction method. 2 Powder, take 11.17g Y 2 O 3 The initial powder and 23.61gCuO, 115.21g BaCuO 2 The powder massage ...

Embodiment 3

[0074] Based on the raw material Y 2 O 3 The powder is used as the initial powder of the solid-phase precursor powder as an example. The method for preparing monodomain yttrium-barium-copper-oxygen superconducting bulk material by the top seed crystal infiltration method consists of the following steps:

[0075] (1) Preparation of solid phase precursor powder

[0076] Take 106.9064g BaCO 3 Mix evenly with 43.0936g CuO at a molar ratio of 1:1 and make BaCuO by solid-state reaction method 2 Powder, will Y 2 O 3 Starting powder and BaCuO 2 The powder massager ratio is 1:2.5 and mix, take 100g of the mixed powder and add it to the ball mill and mix evenly to make (Y 2 O 3 +2.5BaCuO 2 ) Solid phase precursor powder;

[0077] (2) Preparation of liquid source powder

[0078] Take 106.9064g BaCO 3 It is mixed evenly with 43.0936g CuO at a molar ratio of 1:1 and sintered into BaCuO by solid-state reaction method. 2 Powder, take 11.17g Y 2 O 3 The initial powder and 23.61gCuO, 115.21g BaCuO 2 Th...

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Abstract

The invention relates to a method for preparing a single domain yttrium barium copper oxide superconduction block. Through changing components of solid phase source powder and liquid phase source powder which are used in a solid phase block, the whole infiltration growth process only needs precursor powder of BaCuO2, thus the experiment links are simplified, the experiment period is shortened, the experiment cost is lowered, and the efficiency is increased; and the single domain yttrium barium copper oxide superconduction block prepared by adopting the method provided by the invention has large magnetic levitation force and is beneficial to prevention of loss of a liquid phase and collapse of a sample, the full contact of the liquid phase with the solid phase and the orientated growth of crystals by adopting an assembly method that a liquid phase block is slightly larger than or equal to a solid phase precursor block in size.

Description

Technical field [0001] The invention belongs to the technical field of high-temperature copper oxide superconducting materials, and particularly relates to a top seed crystal infiltration growth method for preparing single domain yttrium barium copper oxide superconducting bulk materials. Background technique [0002] Single-domain copper oxide high-temperature superconducting bulk material (RE-Ba-Cu-O, where RE is a rare earth element, such as Nd, Gd, Y, etc.) has a high critical temperature and critical current density, and has a strong magnetic field Strong magnetic flux pinning ability. This advantage lays the foundation for the application of this type of material in magnetic levitation technology, especially in the development of superconducting magnetic bearings, energy storage flywheels, superconducting motors and generators, etc., with good application prospects. In the process of preparing single-domain copper oxide superconducting bulk materials, there are two main ap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B1/00C30B29/22C04B35/45
Inventor 杨万民王孝江王明梓
Owner SHAANXI NORMAL UNIV
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