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Preparation method of single domain GdBaCuO superconductor block

A technology of gadolinium barium copper oxide and superconducting blocks, which is applied in chemical instruments and methods, single crystal growth, single crystal growth, etc., can solve the problems of long time consumption, achieve high critical current density, prevent loss, and have good repeatability Effect

Active Publication Date: 2014-07-02
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the time-consuming problem of preparing multiple precursor powders in the preparation of single-domain gadolinium-barium-copper-oxygen superconducting bulk materials in the prior art, the present invention provides a kind of Monodomain gadolinium-barium-copper-oxygen superconducting bulk material with high current density, easy directional growth, and low-cost mono-domain gadolinium-barium-copper-oxygen superconducting bulk material preparation method

Method used

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  • Preparation method of single domain GdBaCuO superconductor block
  • Preparation method of single domain GdBaCuO superconductor block
  • Preparation method of single domain GdBaCuO superconductor block

Examples

Experimental program
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Effect test

Embodiment 1

[0037] with Gd 2 o 3 Primary powder and BaCO 3 , CuO powder is the solid-phase precursor powder raw material as an example, the method for preparing single-domain gadolinium barium copper oxide superconducting bulk material has the following steps:

[0038] (1) Preparation of BaCuO 2 pink

[0039] Take 142.5397g BaCO 3 Mix with 57.4603g CuO powder in a molar ratio of 1:1, and make BaCuO by solid state reaction method 2 pink.

[0040] (2) Preparation of solid phase precursor powder and liquid phase source powder

[0041] Take 54.4920gGd 2 o 3 Initial powder with 45.5080gBaCuO 2 The powder is mixed evenly with a molar ratio of 1:1.2, as a solid phase precursor powder, take 11.1721g Y 2 o 3 Powder with 115.2145g BaCuO 2 CuO powder and 23.6134g CuO powder were uniformly mixed in a ball mill at a molar ratio of 1:10:6 as the liquid phase source powder.

[0042] (3) Press solid phase precursor block and liquid phase block

[0043] Take 9g of solid phase precursor powde...

Embodiment 2

[0056] with Gd 2 o 3 Primary powder and BaCO 3 , CuO powder is the solid-phase precursor powder raw material as an example, the method for preparing single-domain gadolinium barium copper oxide superconducting bulk material has the following steps:

[0057] (1) Preparation of BaCuO 2 pink

[0058] Take 142.5397g BaCO 3 Mix with 57.4603g CuO powder in a molar ratio of 1:1, and make BaCuO by solid state reaction method 2 pink.

[0059] (2) Preparation of solid phase precursor powder and liquid phase source powder

[0060] Take 56.4688gGd 2 o 3 The initial powder and 43.5312g BaCuO 2 The powder is mixed evenly with a molar ratio of 1:1.1, as a solid phase precursor powder, take 11.1721g Y 2 o 3 Powder with 115.2145g BaCuO 2 CuO powder and 23.6134g CuO powder were uniformly mixed in a ball mill at a molar ratio of 1:10:6 as the liquid phase source powder.

[0061] (3) Press solid phase precursor block and liquid phase block

[0062] Take 9g of solid phase precursor p...

Embodiment 3

[0069] with Gd 2 o 3 Primary powder and BaCO 3 , CuO powder is the solid-phase precursor powder raw material as an example, the method for preparing single-domain gadolinium barium copper oxide superconducting bulk material has the following steps:

[0070] (1) Preparation of BaCuO 2 pink

[0071] Take 142.5397g BaCO 3 Mix with 57.4603g CuO powder in a molar ratio of 1:1, and make BaCuO by solid state reaction method 2 pink.

[0072] (2) Preparation of solid phase precursor powder and liquid phase source powder

[0073] Take 52.6490g Gd 2 o 3 Initial powder with 47.3510g BaCuO 2 The powder is mixed evenly with a molar ratio of 1:1.4, as a solid phase precursor powder, take 11.1721g Y 2 o 3 Powder with 115.2145g BaCuO 2 CuO powder and 23.6134g CuO powder were uniformly mixed in a ball mill at a molar ratio of 1:10:6 as the liquid phase source powder.

[0074] (3) Press solid phase precursor block and liquid phase block

[0075] Take 9g of solid phase precursor powde...

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Abstract

The invention relates to a preparation method of a single domain GdBaCuO superconductor block, and the preparation method is used fo realizing that the whole infiltration and growth process only requires preparing BaCuO2 powder by changing source powder components of solid blocks and liquid blocks by adopting a top seeded infiltration and growth method, so that the step of preparing precursor powder is greatly simplified, the preparation cycle is shortened, the process cost is reduced, and the efficiency is improved. The single domain GdBaCuO superconductor block is good in repeatability, and easy to directionally grow; and the prepared sample has high magnetic levitation force and high critical current density. The invention also adopts an assembly method that the diameter of the liquid block is equal to or slightly larger than that of the solid block, so that liquid phase loss and sample collapse can be prevented, and the solid phase can be sufficiently contacted with the liquid phase.

Description

technical field [0001] The invention belongs to the technical field of research on high-temperature copper oxide superconducting materials, and specifically relates to a method for preparing monodomain gadolinium-barium-copper-oxygen superconducting block materials by using a top seed crystal infiltration growth method. Background technique [0002] Monodomain 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 flux pinning capability. This advantage has laid the foundation for the application of this type of material in magnetic levitation technology, especially in the development of superconducting magnetic levitation bearings, energy storage flywheels, and superconducting motors and generators. In the process of preparing single-domain copper oxide superconducting bulk materials, there are two...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/45C04B35/622C30B1/10C30B1/00C30B29/22
Inventor 杨万民王明梓王孝江
Owner SHAANXI NORMAL UNIV
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