Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Infiltration method for preparing single-domain Gd-Ba-Cu-O superconducting block

A technology of gadolinium barium copper oxide and superconducting block, which is applied in the field of high-temperature copper oxide superconducting materials, can solve the problems of low carbon content, prolonging the preparation cycle of infiltration growth method, increasing cost, etc., to prevent the loss of liquid phase, The effect of shortening the experiment cycle and saving energy

Active Publication Date: 2012-01-11
SHAANXI NORMAL UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And each kind of precursor powder is prepared by the traditional solid state reaction method, that is, through repeated high-temperature calcination and grinding to obtain a precursor powder with pure phase, low carbon content and small particle size (0.1-10 microns). It takes one week to make, which greatly prolongs the preparation cycle of the infiltration growth method and increases the cost of the experiment

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Infiltration method for preparing single-domain Gd-Ba-Cu-O superconducting block
  • Infiltration method for preparing single-domain Gd-Ba-Cu-O superconducting block
  • Infiltration method for preparing single-domain Gd-Ba-Cu-O superconducting block

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. Preparation of Gd 2 BaCuO 5 pioneer powder

[0032] Take 85.0421g Gd 2 o 3 , 46.2957g BaCO 3 , 18.6622g CuO powder mixed, namely Gd 2 o 3 with BaCO 3 , The molar ratio of CuO powder is 1:1:1, and Gd is prepared by solid state reaction method 2 BaCuO 5 pink. Take 100g Gd 2 BaCuO 5 powder into the ball mill, add Gd 2 BaCuO 5 Powder mass 2% CeO 2 powder, mixed well, prepared into Gd 2 BaCuO 5 Herald powder.

[0033] 2. Preparation of liquid phase source powder

[0034] Take 106.9053g BaCO 3 , 43.0947g CuO mixed, namely BaCO 3 The molar ratio with CuO powder is 1:1, and BaCuO is prepared by solid state reaction method 2 pink. Will 34.0877g Gd 2 BaCuO 5 Precursor powder, 120g BaCuO 2 Powder, 27.3274g CuO powder are mixed evenly in the ball mill, namely Gd 2 BaCuO 5 Precursor powder and BaCuO 2 The molar ratio of CuO powder and CuO powder is 1:9:6, which is used as the liquid phase source powder.

[0035] 3. Suppression of Gd 2 BaCuO 5 Pioneer...

Embodiment 2

[0050] In the preparation of Gd 2 BaCuO 5 Precursor powder step 1, prepare Gd 2 BaCuO 5 Powder used raw material and preparation method are identical with embodiment 1, get 100g Gd 2 BaCuO 5 powder into the ball mill, add Gd 2 BaCuO 5 Powder mass 1% CeO 2 powder, mixed well, prepared into Gd 2 BaCuO 5 Herald powder. Other steps of this embodiment are the same as in Embodiment 1. A gadolinium-barium-copper-oxygen superconducting block with a diameter of 20mm was prepared, and the prepared monodomain gadolinium-barium-copper-oxygen superconducting block was tested with a three-dimensional magnetic field and a magnetic force testing device to test the magnetic levitation force, and the magnetic levitation force density reached 8.1N / cm 2 .

Embodiment 3

[0052] suppressing Gd 2 BaCuO 5 Take 30g Gd from step 3 of precursor block and liquid phase block 2 BaCuO 5 Pioneer powder, 30g liquid phase source powder, respectively pressed into Gd with a diameter of 30mm 2 BaCuO 5 Pioneer block and liquid phase block. In pressed support block step 4, take 4.5g Yb 2 o 3 The powder is pressed into a compact with a diameter of 30 mm and a thickness of 2 mm as a support block. In step 6 of the infiltration growth monodomain gadolinium barium copper oxide bulk material, put the assembled precursor block into the tube furnace, raise the temperature to 800°C at a rate of 100°C per hour, and then increase the temperature at a rate of 50°C per hour The temperature was raised to 1055°C and kept for 1.5 hours; the temperature was lowered to 1035°C at a cooling rate of 60°C per hour, and slowly cooled to 1015°C at a cooling rate of 0.2°C per hour, and naturally cooled to room temperature with the furnace to obtain a single tube with a diameter...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
diameteraaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to an infiltration method for preparing a single-domain Gd-Ba-Cu-O superconducting block. The method comprises the following steps: preparing pioneer powder of Gd2BaCuO5 and liquid-phase source powder; suppressing a pioneer block of Gd2BaCuO5 and a liquid-phase block; compressing a supporting block; assembling the pioneer block; infiltrating and growing the single-domain Gd-Ba-Cu-O block; and carrying out oxygen permeation treatment. The invention adopts a top seed crystal permeation growth method and enables the whole permeation growth process to only need two kinds of pioneer powder of Gd2BaCuO5 and BaCuO2 by changing components of the liquid-phase source powder used by the liquid-phase block, thereby simplifying the experimental links, shortening the experimental period, decreasing the experimental cost, saving power resources and improving the efficiency. The method adopts Yb2O3 to prepare the supporting block which stably supports the two blocks in a slow cold growth process of the Gd-Ba-Cu-O block to prevent liquid-phase loss; and the method not only can be used for preparing the Gd-Ba-Cu-O superconducting block but also can be used for preparing high-temperature superconducting blocks of other series, such as Y, Sm, Nd, Eu, and the like.

Description

technical field [0001] The invention belongs to the technical field of high-temperature copper oxide superconducting materials, and in particular relates to the preparation of monodomain gadolinium-barium-copper-oxygen superconducting block materials by a top seed crystal infiltration growth method. Background technique [0002] Since the top seed infiltration growth process was invented, more and more researchers have paid attention to it, because it can effectively solve the problems existing in the traditional melt texture growth process, such as sample shrinkage, deformation, and the presence of a large number of Pores and macro cracks, severe liquid phase loss, Gd 2 BaCuO 5 Particle segregation, etc. In the infiltration growth process, three precursor compacts of equal diameter are used, including the Gd 2 BaCuO 5 Pioneer block, liquid phase block and support block, Gd 2 BaCuO 5 The precursor block is composed of Gd with high phase purity and small particle size ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/22C04B35/50H01B12/00
CPCY02E40/64Y02E40/60
Inventor 杨万民李国政
Owner SHAANXI NORMAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com