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Large-diameter rare earth barium copper oxide superconducting target material and preparation method thereof

A copper oxide, large-diameter technology, applied in the field of high-temperature superconducting tape preparation, can solve problems not involving the preparation technology of large-diameter targets, and achieve the effects of shortening sintering time, increasing target density, and increasing yield

Active Publication Date: 2020-11-17
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it should be pointed out that this patent can only provide a preparation process of target powder, and does not involve the preparation technology of large-diameter targets.

Method used

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  • Large-diameter rare earth barium copper oxide superconducting target material and preparation method thereof
  • Large-diameter rare earth barium copper oxide superconducting target material and preparation method thereof
  • Large-diameter rare earth barium copper oxide superconducting target material and preparation method thereof

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Embodiment 1

[0043] This embodiment relates to a method for preparing a gadolinium barium copper oxide superconducting target, the method comprising the following steps:

[0044] 1) Raw material selection: gadolinium oxide (Gd 2 o 3 ), barium cuprate (Ba 3 Cu 7 o x , the oxygen content may not be unique), copper oxide (CuO), the particle size of the three raw material powders is 200 mesh;

[0045] 2) The first step is to mix gadolinium oxide, barium cuprate, and copper oxide, wherein the molar ratio of gadolinium oxide, barium cuprate, and copper oxide is 0.5:0.66:1.6.

[0046] 3) In the second step, the mixed powder is placed in a 10-inch high-temperature alloy steel mold for non-vacuum pressure sintering to obtain a superconducting target blank; the sintering pressure is normal pressure, the sintering atmosphere is air, and the sintering temperature is 800 ° C. The sintering pressure is 100 tons, and the holding time is 60 minutes.

[0047] 4) In the third step, the upper and lower...

Embodiment 2

[0050] This embodiment relates to a method for preparing a superconducting target material mixed with europium barium copper oxide and barium zirconate. The method includes the following steps:

[0051] 1) Raw material selection: europium oxide (Eu 2 o 3 ), barium cuprate (Ba 2 Cu 2 o x , the oxygen content may not be unique), copper oxide (CuO), barium zirconate, the particle size of the four raw material powders is 400 mesh;

[0052] 2) The first step is to mix europium oxide, barium cuprate, copper oxide, and barium zirconate, wherein the molar ratio of gadolinium oxide, barium cuprate, copper oxide, and barium zirconate is 1:2:2:0.1.

[0053] 3) In the second step, the mixed powder is placed in an 8-inch high-temperature alloy steel mold for non-vacuum pressure sintering to obtain a superconducting target blank; the sintering pressure is normal pressure, the sintering atmosphere is oxygen, and the sintering temperature is 1000 ° C. The sintering pressure is 50 tons, a...

Embodiment 3

[0057] This embodiment relates to a kind of europium samarium barium copper oxide and barium hafnate and Ba 2 wxya 6 A method for preparing a mixed-component superconducting target, the method comprising the steps of:

[0058] 1) Raw material selection: europium oxide (Eu 2 o 3 ), samarium oxide (Sm 2 o 3 ), barium cuprate (Ba 3 Cu 7 o x , the oxygen content may not be unique), barium oxide (BaO), barium hafnate (BaHfO 3 ), Ba 2 wxya 6 The particle size of the six raw material powders is 300 mesh;

[0059] 2) In the first step, the starting raw material powders are mixed, wherein europium oxide, samarium oxide, barium cuprate, barium oxide (BaO), barium hafnate, Ba 2 wxya 6 The molar ratio is 1:1:1:1:0.05:0.05.

[0060] 3) In the second step, the mixed powder is placed in a 12-inch high-temperature alloy steel mold for non-vacuum pressure sintering to obtain a superconducting target blank; the sintering pressure is normal pressure, the sintering atmosphere is oxyg...

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Abstract

The invention discloses a preparation method of a large-diameter rare earth barium copper oxide superconducting target material. The large-diameter rare earth barium copper oxide superconducting target material is prepared by: step 1, uniformly mixing initial raw materials according to a certain proportion without adding any binder to obtain mixed powder; and step 2, placing the obtained mixed powder in a high-temperature alloy steel mold, and carrying out non-vacuum pressure sintering to obtain the large-diameter rare earth barium copper oxide superconducting target material. In addition, theinvention further discloses a large-diameter rare earth barium copper oxide superconducting target material which is prepared by adopting the preparation method. In addition, the invention also discloses a superconducting film which is prepared from the large-diameter rare earth barium copper oxide superconducting target material. According to the large-diameter rare earth barium copper oxide superconducting target material, the yield of the large-diameter superconducting target material can be remarkably improved, the occurrence probability of macroscopic or microcracks of the target material is reduced, the density of the target material is improved, and harmful impurity elements in the target material can be reduced.

Description

technical field [0001] The invention belongs to the technical field of high-temperature superconducting tape preparation, and in particular relates to a target, a method for preparing the target and a product made of the target. In particular, it relates to a rare earth barium copper oxide superconducting target material and a preparation method thereof. Background technique [0002] Rare earth barium copper oxide is a practical superconducting material, which is the core part of the second-generation high-temperature superconducting tape, and is mainly deposited on a flexible metal substrate in the form of an epitaxial film. At present, physical vapor deposition technology is one of the main preparation methods for preparing rare earth barium copper oxide superconducting films. Physical vapor deposition includes magnetron sputtering technology, pulsed laser deposition technology, ion jet deposition technology, etc. This technical route can transfer the cationic components ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/50C04B35/645
CPCC04B35/50C04B35/645C04B2235/3215C04B2235/3248C04B2235/3255C04B2235/3281C04B2235/3282C04B2235/3293C04B2235/658C04B2235/6583C04B2235/6584C04B2235/77C04B2235/96
Inventor 赵跃吴东红陈宇姜广宇金之俭
Owner SHANGHAI JIAO TONG UNIV