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Doping material for reducing single domain YBaCuO superconduction block cost and doping method thereof

A technology of doping materials and superconducting blocks is applied in the field of reducing the cost of single-domain yttrium barium copper oxide superconducting blocks, which can solve the problems of high price, increase the raw material cost of YBaCuO superconducting blocks, and the overall effect is not as good as Pt, etc., so as to reduce the cost. Effect

Active Publication Date: 2012-01-25
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since Pt is an expensive noble metal element, the doping of Pt increases the raw material cost of YBaCuO superconducting bulk
Use cheap CeO 2 Substituting Pt has the effect of refining 211 phase particles and improving performance, but the overall effect is not as good as Pt

Method used

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  • Doping material for reducing single domain YBaCuO superconduction block cost and doping method thereof
  • Doping material for reducing single domain YBaCuO superconduction block cost and doping method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] BaCO 3 , CeO 2 The powder is mixed according to the ratio of Ba:Ce=1:1, and then it is roasted at 1400°C-1500°C for 5-10 hours to form BaCeO 3 Mutually. BaCeO 3 Powder press relative to Y1.8Ba 2.4 Cu 3.4 o y The ratio of 0.25wt%, 0.50wt% and 1.00wt% of the precursor powder was added to Y 1.8 Ba 2.4 Cu 3.4 o y In the pioneer powder, after being uniformly mixed by ball milling, it is formed by uniaxial compression molding, and then the top seed assisted melt texture growth process (TSMTG) is used to generate three single-domain YBaCuO superconducting blocks with different compositions.

[0018] Samples were taken from the above three single-domain superconducting bulks with different compositions, and their critical current densities (J c ), which is doped with 0.50wt% BaCeO 3 The sample works best, J c Compared with the undoped sample, it has reached the same level as the sample doped with 0.2wt% Pt, and doped with 0.25wt% and 1.00wt% BaCeO 3 Sample J c Alt...

Embodiment 2

[0021] BaCO 3 , CeO 2 and Gd 2 o 3 The powder is mixed according to the ratio of Ba:Ce:Gd=1:1-x:x (x=0.1, 0.2), and then it is roasted at 1400°C-1500°C for 5-10 hours to form BaCe 1-x Gd x o 3 Mutually. BaCe 1-x Gdx o 3 Pink press relative to Y 1.8 Ba 2.4 Cu 3.4 o y The ratio of 0.50wt% of the precursor powder was added to Y 1.8 Ba 2.4 Cu 3.4 o y In the pioneer powder, after being uniformly mixed by ball milling, it is formed by uniaxial compression molding, and then the single-domain YBaCuO superconducting block is generated by the top seed assisted melt texture growth process (TSMTG).

[0022] Measured respectively 30mm in diameter and 17mm in thickness doped with 0.50wt% BaCe 0.9 Gd 0.1 o 3 (x=0.1) and doped with 0.50wt% BaCe 0.8 Gd 0.2 o 3 Magnetic buoyancy properties of monodomain superconducting bulk for (x = 0.2). The maximum magnetic buoyancy forces are 105N and 104N, respectively, significantly higher than the undoped single domain superconductin...

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Abstract

The invention relates to a doping material for reducing the cost of single-domain YBaCuO bulk superconductor and a doping method thereof. The chemical formula of the doping material is BaCe[1-x]GdxO3, wherein x is more than or equal to 0 and less than or equal to 0.2. The doping material BaCe[1-x]GdxO3 is generated by mixing BaCO3 powder, CeO2 powder and Gd2O3 powder according to the fact that the mixture ratio Ba:Ce:Gd of 1:1-x:x, roasting the mixture for 5 to 10 hours at a temperature of between 1,400 and 1,500 DEG C, and making the mixture reacting. The YBaCuO bulk superconductor with a single-domain structure is generated by the following steps: adding the BaCe[1-x]GdxO3 which is 0.25 to 1.00 weight percent of Y1.8Ba2.4Cu3.4Oy precursor powder into the Y1.8Ba2.4Cu3.4Oy precursor powder, wherein x in the BaCe[1-x]GdxO3 is more than or equal to 0 and less than or equal to 0.2; using a single axle for compression molding forming after grinding and uniform mixing; and adopting top-seeding-melt-texture-growth technology. The invention prepares the single-domain YBaCuO bulk superconductor by doping the cheap BaCe[1-x]GdxO3 instead of noble metals Pt into the YBaCuO precursor powder, and reduces the cost of the single-domain bulk superconductor on the premise of not reducing the material properties.

Description

technical field [0001] The invention relates to a method for reducing the cost of a monodomain yttrium barium copper oxide (YBaCuO) superconducting block. Background technique [0002] The composition of YBaCuO superconducting block is YBa 2 Cu 3 o 7-y The superconducting phase (123 phase) is the main phase, and a certain amount of Y is added 2 BaCuO 5-x Non-superconducting phase (211 phase). The main purpose of adding the non-superconducting 211 phase is to prevent the loss of the liquid phase during the growth of the monodomain superconducting bulk. The YBaCuO superconducting block generates a c-axis preferred orientation crystal structure through the peritectic reaction, and the final product has the characteristics of a large number of granular 211 phases trapped in the layered 123 phase matrix. The results of a large number of process studies have confirmed that the fine 211 phase particles dispersed in the 123 phase matrix can increase the magnetic flux pinning a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L39/12C04B35/45C04B35/622H01B12/00H10N60/85
CPCY02E40/64Y02E40/60
Inventor 肖玲焦玉磊郑明辉
Owner GRIMAT ENG INST CO LTD