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Preparation method for YBCO superconductive block material enhanced by metal oxide crystal whiskers

A technology of oxides and superconducting blocks, applied in the field of preparation of YBCO superconducting blocks, can solve problems such as unreported, and achieve the effect of improving superconducting properties, high modulus and excellent superconducting properties

Active Publication Date: 2013-10-23
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, up to now, there is no report on the introduction of metal oxide whiskers as reinforcements during the preparation of YBCO bulk materials to obtain high mechanical strength YBCO superconducting materials.

Method used

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  • Preparation method for YBCO superconductive block material enhanced by metal oxide crystal whiskers
  • Preparation method for YBCO superconductive block material enhanced by metal oxide crystal whiskers
  • Preparation method for YBCO superconductive block material enhanced by metal oxide crystal whiskers

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Embodiment 1

[0035] combine figure 1 , figure 2 and image 3 , the preparation method of the metal oxide whisker reinforced YBCO superconducting bulk material of the present embodiment comprises the following steps:

[0036] Step 1. Prepare the first mixed powder 1 and the second mixed powder 2 respectively:

[0037] Step 101, Y123 (Y123 is YBa 2 Cu 3 o 7-x ) powder, Y211 (Y211 is Y 2 BaCuO 5 ) powder and metal oxide whiskers were added into a mortar, ground and mixed evenly to obtain the first mixed powder 1; the mass percentage of metal oxide whiskers in the first mixed powder 1 was 5%, and the first mixed powder The molar ratio of Y123 powder and Y211 powder in powder 1 is 1:0.3; the metal oxide whiskers are preferably Al 2 o 3 Whiskers, TiO 2 One or more of whiskers and MgO whiskers. The metal oxide whiskers used in this embodiment have an aspect ratio (the aspect ratio refers to the ratio of the length of the metal oxide whiskers to the cross-sectional diameter) of not less...

Embodiment 2

[0046] to combine figure 1 , figure 2 and image 3 , the preparation method of the metal oxide whisker reinforced YBCO superconducting bulk material of the present embodiment comprises the following steps:

[0047] Step 1. Prepare the first mixed powder 1 and the second mixed powder 2 respectively:

[0048] Step 101, Y123 (Y123 is YBa 2 Cu 3 o 7-x ) powder, Y211 (Y211 is Y 2 BaCuO 5 ) powder and metal oxide whiskers were added into a mortar, ground and mixed evenly to obtain the first mixed powder 1; the mass percentage of metal oxide whiskers in the first mixed powder 1 was 10%, and the first mixed powder The molar ratio of Y123 powder and Y211 powder in powder 1 is 1:0.3; the metal oxide whiskers are preferably Al 2 o 3 Whiskers, TiO 2 One or more of whiskers and MgO whiskers. The metal oxide whiskers used in this embodiment have an aspect ratio (the aspect ratio refers to the ratio of the length of the metal oxide whiskers to the cross-sectional diameter) of not ...

Embodiment 3

[0057] to combine figure 1 , figure 2 and image 3 , the preparation method of the metal oxide whisker reinforced YBCO superconducting bulk material of the present embodiment comprises the following steps:

[0058] Step 1. Prepare the first mixed powder 1 and the second mixed powder 2 respectively:

[0059] Step 101, Y123 (Y123 is YBa 2 Cu 3 o 7-x ) powder, Y211 (Y211 is Y 2 BaCuO 5 ) powder and metal oxide whiskers were added into a mortar, ground and mixed evenly to obtain the first mixed powder 1; the mass percentage of metal oxide whiskers in the first mixed powder 1 was 15%, and the first mixed powder The molar ratio of Y123 powder and Y211 powder in powder 1 is 1:0.3; the metal oxide whiskers are preferably Al 2 o 3 Whiskers, TiO 2 One or more of whiskers and MgO whiskers. The metal oxide whiskers used in this embodiment have an aspect ratio (the aspect ratio refers to the ratio of the length of the metal oxide whiskers to the cross-sectional diameter) of not ...

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Abstract

The invention provides a preparation method for a YBCO superconductive block material enhanced by metal oxide crystal whiskers. The preparation method comprises the following steps: first, mixed powders are prepared; second, powder pressed compacts are prepared; third, seed crystals are placed on the top of the pressed compacts, and then the pressed compacts are subjected to crystallization to obtain a single-domain block material; fourth, the single-domain block material is objected to oxygen diffusion to obtain a YBCO superconductive block material enhanced by metal oxide crystal whiskers. The preparation method is simple and practicable, has advantages of high efficiency and easy control of reactions, and is suitable for large scale industrial production. The prepared YBCO superconductive block material enhanced by metal oxide crystal whiskers has strong magnetic levitation force, good superconductive performance and good mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of superconducting materials, and in particular relates to a method for preparing a metal oxide whisker-reinforced YBCO superconducting bulk material. Background technique [0002] Since the discovery of yttrium barium copper oxide (YBCO) high-temperature superconductor in 1987, the research work on the preparation of YBCO superconducting bulk materials with practical prospects has been paid attention to. The YBCO block will form microscopic cracks during the process of oxygen infiltration and melting growth, coupled with the brittleness of the YBCO material itself, the mechanical properties are relatively low. At the same time, when the YBCO superconducting block is used in a high magnetic field environment, it will generate magnetic field stress. When the stress is greater than the mechanical strength of the superconducting block, the microscopic cracks inside the block will expand and grow, resulting in t...

Claims

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Application Information

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IPC IPC(8): C04B35/81C04B35/45C04B35/622
Inventor 冯建情徐晓燕李成山于泽铭金利华张平祥
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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