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Continuous preparation device and preparation method for bismuth-series high temperature superconductive thick film

A technology for high-temperature superconductivity and device preparation, which is applied to the usage of superconductor elements, superconducting devices, superconducting/high-conducting conductors, etc. Restricting the performance of superconducting thick film and other issues, to achieve the effect of increasing the effective current-carrying area, convenient processing, installation and layout, and shortening the preparation cycle

Active Publication Date: 2013-06-12
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the thick film prepared by the traditional dip coating method, due to the relatively loose bonding between the powders, pores are relatively easy to form during the texture formation process of partial melting heat treatment, and the effective distance of the baseband-induced texture is small, eventually resulting in a superconducting layer. The texture degree is low, which seriously restricts the improvement of the properties of Bi-2212-based superconducting thick films

Method used

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  • Continuous preparation device and preparation method for bismuth-series high temperature superconductive thick film
  • Continuous preparation device and preparation method for bismuth-series high temperature superconductive thick film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as figure 1 A continuous preparation device for a bismuth-based high-temperature superconducting thick film is shown, including dip-coating equipment for uniformly dip-coating coating slurry on the outer surface of the processed wire strip, and dip-coating with the coating slurry The drying equipment for drying the treated line strip, the rolling equipment for rolling the treated line strip after drying, and the treated line strip from the dip coating equipment, drying Drawing equipment for continuous drawing in dry equipment and rolling equipment. The dip coating equipment includes a mixing container 1 for uniformly mixing the coating slurry. The mixing container 1 is provided with a guide wheel 2 4-4, and the lower part of the guide wheel 4-4 is soaked in the mixing material. Inside the coating slurry in container 1. The wire pulling equipment includes a pay-off machine 4-1 and a wire take-up machine 4-2 arranged behind the pay-off machine 4-1 and used in conju...

Embodiment 2

[0075] In this embodiment, the structure, connection relationship and working principle of the bismuth-based high-temperature superconducting thick film continuous preparation device are the same as those in Embodiment 1.

[0076] In this example, the difference between the continuous preparation method of bismuth-based high-temperature superconducting thick film and Example 1 is that the strip to be processed in step 1 is made by cold rolling with a size of 4.0×0.1×1000mm Silver-based strip 8 with a line speed of V=0.1m / s; when dip-coating the coating slurry in step 2, the organic solvent used is ethanol, and the volume of the organic solvent added in every gram of Bi-2212 powder is 1.2ml , the adding rate of the liquid adding device is 0.57ml / s, and the adding rate of the solid powder adding device is 0.15g / s; when heat treatment is carried out after the winding-up in step 5, it is first incubated at 882°C for 20 Minutes, and then cooled to 840°C at a cooling rate of 5°C / h, ...

Embodiment 3

[0079] In this embodiment, the structure, connection relationship and working principle of the bismuth-based high-temperature superconducting thick film continuous preparation device are the same as those in Embodiment 1.

[0080] In this example, the difference between the continuous preparation method of bismuth-based high-temperature superconducting thick film and Example 1 is that the strip to be processed in step 1 is made by cold rolling with a size of 4.0×0.05×2000mm Silver-based strip 8 with a line speed of V=0.01m / s; when dip-coating the coating slurry in step 2, the organic solvent used is ethanol, and the volume of the organic solvent added in every gram of Bi-2212 powder is 1.2ml , the adding rate of the liquid adding device is 0.47ml / s, and the adding rate of the solid powder adding device is 0.02g / s; when heat treatment is carried out after the winding-up in step 5, it is first kept at a temperature of 890°C for 40 Minutes, and then cooled to 840°C at a cooling r...

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Abstract

The invention discloses a continuous preparation device and a preparation method for a bismuth-series high temperature superconductive thick film. The continuous preparation device comprises dipping equipment used for evenly dipping coating slurry on the outer surface of a wire and tape to be processed, drying equipment for drying the wire and tape (to be processed) dipped with the coating slurry, rolling equipment for rolling the wire and tape (to be processed) after drying treatment, and wire drawing equipment used for drawing the wire and tape (to be processed) to penetrate through the dipping equipment, drying equipment and rolling equipment in order; and the wire drawing equipment comprises a wire unwinding machine and a wire winding machine. The preparation method comprises the following steps of: 1, adjusting the wiring rate V; 2, dipping coating slurry; 3, drying; 4, rolling; and 5, winding a wire and performing heat treatment. The continuous preparation device and preparationmethod in the invention have the advantages of reasonable design, convenience in operation and realization, good preparation effect and high processing efficiency, and can be used for preparing a Bi-2212 superconductive thick film with a certain length and high current carrying performance.

Description

technical field [0001] The invention belongs to the technical field of high-temperature superconducting thick film preparation, and in particular relates to a continuous preparation device and method for bismuth-based high-temperature superconducting thick film. Background technique [0002] Since Bi-2212 (that is, the high-temperature superconducting bismuth-based Bi 2 Sr 2 CaCu 2 o 8+6 ) High-temperature superconducting materials have excellent low-temperature high-field current-carrying properties in the 4.2-20K temperature range, and are the only high-temperature superconducting materials that can be prepared into isotropic round wires, making them ideal for low-temperature high-field magnet interpolation coils material of choice. At the same time, based on the excellent high-field diamagnetic properties of Bi-2212 high-temperature superconducting materials, Bi-2212 superconducting thick films have a wide range of applications in fields such as magnetic shielding, fl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/06H01B12/06
CPCY02E40/642Y02E40/60
Inventor 张胜楠李成山郝清滨白利锋张义磊
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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