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Method for producing Bi-series high-temperature superconductive wire

A high-temperature superconductivity, wire technology, applied in the usage of superconductor elements, superconducting/high-conducting conductors, superconducting devices, etc., can solve problems such as complicated methods

Active Publication Date: 2007-11-21
INNOVA SUPERCONDUCTOR TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the method is more complex

Method used

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  • Method for producing Bi-series high-temperature superconductive wire
  • Method for producing Bi-series high-temperature superconductive wire
  • Method for producing Bi-series high-temperature superconductive wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Heat treatment of the rolled wire.

[0039] The structural diagram of the 61-core superconducting wire whose main phase is BSCCO-2223 after rolling is shown in Figure 1, in which 1 is the superconducting core, 2 is pure silver, and 3 is silver-magnesium-nickel alloy. The above samples are divided into There are 16 types, 4 samples for each type, and the length of the samples is 4cm, and then put them into the high temperature and high pressure equipment respectively. Firstly, under different total pressure and different oxygen partial pressure conditions, the temperature is raised from room temperature to different holding temperature, and the temperature is lowered to room temperature after holding for different time.

[0040] The wire prepared above was pressurized to 10MPa at room temperature, heated to 825°C and kept for 20 hours, and finally cooled to room temperature. During the high pressure process, the total pressure is always kept at 10MPa, while the oxygen p...

Embodiment 2

[0045] Heat treatment of the rolled wire. The 61-core superconducting wires whose main phase is BSCCO-2223 after rolling were divided into 12 types, with 4 samples for each type, and the length of each sample was 1m, and then put into high-temperature and high-pressure equipment respectively. First, under the conditions of normal pressure and oxygen partial pressure of 0.01 MPa, it is heated to 830° C. and kept for 10 hours, and then cooled to room temperature.

[0046] Pressurize the wires prepared above to different total pressures at room temperature, and perform high-pressure heat treatment under the conditions of different oxygen partial pressures, holding temperatures and holding times. During the high pressure process, the total pressure and oxygen partial pressure are always kept constant.

[0047] The performance indicators of the final wire are shown in Table 2.

[0048] High pressure heat treatment process

Embodiment 3

[0050] Heat treatment of drawn wires.

[0051] The schematic diagram of the structure of the single-core superconducting wire whose main phase is BSCCO-2212 after drawing is shown in Figure 4. The cross-section of Type 3 samples is shown as a circle in Figure 4(a), and the cross-section of Type 2 samples is shown in Fig. Figure 4(b) is an ellipse, in which 1 is a superconducting core, and 2 is pure silver. The length of the above-mentioned samples is 2m, and they are respectively put into high-temperature and high-pressure equipment. Firstly, under normal pressure and an oxygen partial pressure of 0.009MPa, the temperature is raised from room temperature to different holding temperatures, and then cooled to room temperature after holding for 8 hours.

[0052] The wire prepared above was pressurized to 10MPa at room temperature, heated to 825°C and kept for 20 hours, and finally cooled to room temperature. In the process of high pressure, the total pressure is always maintaine...

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Abstract

A production method of a Bi high temperature superconductor of a BSCCO-2212 or BSCCO-2213 main phrase includes the following steps: the conductor is composed by a core with a main phrase of BSCCO-2212 or BSCCO-2213 and at least one metal base covering around the core; heat treatment the conductor to isolate crackles and holes on the conductor from gas media; high pressure heat treatment the conductor with the pressure within 5MPa and 200 MPa.

Description

technical field [0001] The invention relates to a Bi-based high-temperature superconducting wire, in particular to a method for preparing a Bi-based high-temperature superconducting wire with BSCCO-2212 or BSCCO-2223 as the main phase. Background technique [0002] With the increasing application of high-temperature superconducting technology, the market demand for high-temperature superconducting wires will increase. At present, the Bi-based high-temperature superconducting wire is the only high-temperature superconducting wire that can be mass-produced. Drawing, extrusion and other machining processes are formed, and finally deformation heat treatment is carried out. The deformation heat treatment refers to the addition of necessary mechanical deformation means between the heat treatment processes at each stage to improve the density and texture of the superconducting core in the superconducting wire. A typical deformation heat treatment process mainly includes the follow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B12/00H01B13/00
CPCY02E40/64Y02E40/60
Inventor 望贤成韩征和孙建峰
Owner INNOVA SUPERCONDUCTOR TECH
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