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Method for preparing nano-composite YBCO (yttrium barium copper oxide) superconducting blocks through powder melting-liquid infiltrating combined way

A nanocomposite technology of yttrium barium copper oxide, which is applied in the field of high-temperature copper oxide superconducting materials, can solve the problems of low efficiency, increased workload of scientific research personnel, and prolongation of the preparation cycle of yttrium barium copper oxide superconducting bulk materials. High efficiency, guaranteed superconductivity, and simple process

Inactive Publication Date: 2015-09-30
TIANJIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the use of precursor powder greatly prolongs the preparation cycle of yttrium-barium-copper-oxygen superconducting bulk materials, and the efficiency is very low. At the same time, it increases the workload of scientific researchers and limits the batch preparation, large-scale and industrialization of such materials. application

Method used

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  • Method for preparing nano-composite YBCO (yttrium barium copper oxide) superconducting blocks through powder melting-liquid infiltrating combined way
  • Method for preparing nano-composite YBCO (yttrium barium copper oxide) superconducting blocks through powder melting-liquid infiltrating combined way
  • Method for preparing nano-composite YBCO (yttrium barium copper oxide) superconducting blocks through powder melting-liquid infiltrating combined way

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Prepare mixed powder:

[0031] Take 49.2302g Y 2 o 3 The nano powder is mixed with 33.4276g BaO, 17.3422g CuO initial powder, and 1g CeO is added at the same time 2 Initial powder, ie Y 2 o 3 The molar ratio of nano powder to BaO and CuO initial powder is 1:1:1, and 1% (w / w) CeO is added at the same time 2 Initial powder, mixed evenly, as solid phase mixed powder; take 7.4481g Y 2 o3 Nano powder mixed with 50.5727g BaO, 41.9792g CuO initial powder, namely Y 2 o 3 The molar ratio of nano powder to BaO and CuO initial powder is 1:10:16, which is used as liquid phase mixed powder;

[0032] (2) Press the precursor block:

[0033] Take 5g of solid-phase mixed powder into cylindrical mold 1 (diameter 16mm) and press it into a solid-phase block; take 15g of liquid-phase mixed powder into cylindrical mold 2 (diameter 26mm) and press it into a liquid-phase block; The mass ratio of the solid-phase mixed powder to the liquid-phase mixed powder is 1:3, and the diameter...

Embodiment 2

[0044] In the preparation of mixed powder step (1), take 49.2302g Y 2 o 3 The nano powder is mixed with 33.4276g BaO, 17.3422g CuO initial powder, and 0.5g CeO is added at the same time 2 Initial powder, ie Y 2 o 3 The molar ratio of nano powder to BaO and CuO initial powder is 1:1:1, and 0.5% (w / w) CeO is added at the same time 2 Initial powder, mixed evenly, as solid phase mixed powder; take 7.4481g Y 2 o 3 Nano powder mixed with 50.5727g BaO, 41.9792g CuO initial powder, namely Y 2 o 3 The molar ratio of nano powder to BaO and CuO initial powder is 1:10:16, which is used as liquid phase mixed powder.

[0045] In the step (2) of pressing the precursor block, take 5g of solid-phase mixed powder and put it into cylindrical mold 1 (diameter 16mm) to press into a solid-phase block; take 12.5g of liquid-phase mixed powder and put it into cylindrical mold 2 (diameter 26mm ), pressed into a liquid block; that is, the mass ratio of the solid-phase mixed powder to the liquid-...

Embodiment 3

[0049] In the preparation of mixed powder step (1), take 49.2302g Y 2 o 3 The nano powder is mixed with 33.4276g BaO, 17.3422g CuO initial powder, and 1.5g CeO is added at the same time 2 Initial powder, ie Y 2 o 3 The molar ratio of nano powder to BaO and CuO initial powder is 1:1:1, and 1.5% (w / w) CeO is added at the same time 2 Initial powder, mixed evenly, as solid phase mixed powder; take 7.4481g Y 2 o 3 Nano powder mixed with 50.5727g BaO, 41.9792g CuO initial powder, namely Y 2 o 3 The molar ratio of nano powder to BaO and CuO initial powder is 1:10:16, which is used as liquid phase mixed powder.

[0050] In the step (2) of pressing the precursor block, take 5g of solid-phase mixed powder and put it into cylindrical mold 1 (diameter 16mm) to press into a solid-phase block; take 17.5g of liquid-phase mixed powder and put it into cylindrical mold 2 (diameter 26mm ), pressed into a liquid phase block; that is, the mass ratio of the solid phase mixed powder to the l...

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Abstract

The invention discloses a method for preparing nano-composite YBCO (yttrium barium copper oxide) superconducting blocks through a powder melting-liquid infiltrating combined way. The method comprises the steps of mixed powder preparation, predecessor block pressing, predecessor block assembling, high temperature heat treatment and oxygen permeation treatment. A mixture of a Y2O3 nanometer powder and initial powders of BaO, CuO, and CeO2 is used for preparing a solid phase block through pressing, a mixture of a Y2O3 nanometer powder and the initial powders of BaO and CuO is used for preparing a liquid phase block through pressing, during high temperature heat treatment, powder melting occurs in the blank blocks at the same time, and liquid phase from the liquid phase block permeates to the solid phase block, so that the method is characterized in that powder melting and liquid infiltration coexist. In addition, in the method, any precursor powder is not required, the process is simple and the efficiency is high. Through the use of the Y2O3 nanometer powder, nanoscale Y2BaCuO5 particles are introduced into samples successfully, and the superconducting properties of the blocks are ensured. The method provided by the invention also can be used for preparing other series of nano-composite superconducting bulk materials such as Nd, Sm, Gd and the like.

Description

technical field [0001] The invention belongs to the technical field of high-temperature cupric oxide superconducting materials, and in particular relates to a method for preparing nanocomposite yttrium-barium-copper-oxygen superconducting block materials by combining powder melting and liquid phase infiltration. Background technique [0002] The monodomain yttrium barium copper oxide (Y-Ba-Cu-O) high-temperature superconducting bulk material guided by the top seed crystal technology can carry a high bulk critical current and exhibit high magnetic field capture and magnetic levitation performance. Micro superconducting magnets, superconducting motors, magnetic levitation bearings, energy storage flywheels and maglev trains have broad application prospects. In the process of developing single-domain yttrium-barium-copper-oxygen superconducting bulk materials, there are two main processes that are used more, one is the top seed melting growth (TSMG) method, and the other is the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/505C04B35/622
Inventor 李国政
Owner TIANJIN NORMAL UNIVERSITY
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