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Method for annealing simplified, efficient, low-cost and high-temperature superconductive long band

A high-temperature superconducting, low-cost technology, used in cable/conductor manufacturing, electrical components, circuits, etc., can solve problems such as being unsuitable for large-scale production requirements of kilometer-scale strips, long annealing time, and unstable quality. Annealing time, short annealing time, the effect of improving the purity

Active Publication Date: 2012-09-19
SHANGHAI SUPERCONDUCTOR TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the roll-to-roll tube furnace dynamic annealing process has long annealing time, unstable quality, and high equipment cost, which is not suitable for the large-scale production requirements of kilometer-level strips.

Method used

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  • Method for annealing simplified, efficient, low-cost and high-temperature superconductive long band
  • Method for annealing simplified, efficient, low-cost and high-temperature superconductive long band
  • Method for annealing simplified, efficient, low-cost and high-temperature superconductive long band

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Step 1. Put the long superconducting tape to be annealed on the manual winding machine, and manually wind it on the annealing disk;

[0036] Properly control the manual winding speed (<60 turns / min) during the winding process to avoid excessive pressure between each turn of the strip in the annealing reel, so that there is a certain micro-gap between each layer of the superconducting strip;

[0037] Step 2. Put the annealing tray into the vacuum box furnace and close the furnace door;

[0038] Open the exhaust valve to vacuum;

[0039] At room temperature of 25°C, turn on the mechanical pump to evacuate to 5×10 -2 Torr;

[0040] When the vacuum degree in the annealing box reaches 5×10 -2 After Torr, close the pumping valve, open the intake valve to feed high-purity oxygen with a purity of 99.95%;

[0041] The oxygen flow is controlled by a mass flow meter, and the oxygen flow is controlled within the range of 5-20SCCM;

[0042] When the oxygen pressure gauge inside...

Embodiment 2

[0048] Step 1. Put the long superconducting tape to be annealed on the manual winding machine, and manually wind it on the annealing disk;

[0049] Properly control the manual winding speed (<60 turns / min) during the winding process to avoid excessive pressure between each turn of the strip in the annealing reel, so that there is a certain micro-gap between each layer of the superconducting strip;

[0050] Step 2. Put the annealing tray into the vacuum box furnace and close the furnace door;

[0051] Open the exhaust valve to vacuum;

[0052] At room temperature of 25°C, turn on the mechanical pump to evacuate to 5×10 -2 Torr;

[0053] When the vacuum degree in the annealing box reaches 5×10 -2 After Torr, close the pumping valve, open the intake valve to feed high-purity oxygen with a purity of 99.95%;

[0054] The oxygen flow is controlled by a mass flow meter, and the oxygen flow is controlled within the range of 5-20SCCM;

[0055] When the oxygen pressure gauge inside...

Embodiment 3

[0061] Step 1. Put the long superconducting tape to be annealed on the manual winding machine, and manually wind it on the annealing disk;

[0062] Properly control the manual winding speed (<60 turns / min) during the winding process to avoid excessive pressure between each turn of the strip in the annealing reel, so that there is a certain micro-gap between each layer of the superconducting strip;

[0063] Step 2. Put the annealing tray into the vacuum box furnace and close the furnace door;

[0064] Open the exhaust valve to vacuum;

[0065] At room temperature of 25°C, turn on the mechanical pump to evacuate to 5×10 -2 Torr;

[0066] When the vacuum degree in the annealing box reaches 5×10 -2 After Torr, close the pumping valve, open the intake valve to feed high-purity oxygen with a purity of 99.95%;

[0067] The oxygen flow is controlled by a mass flow meter, and the oxygen flow is controlled within the range of 5-20SCCM;

[0068] When the oxygen pressure gauge inside...

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Abstract

The invention provides a method for annealing a simplified, efficient, low-cost and high-temperature superconductive long band. The method comprises the following steps of: placing the superconductive long band to be annealed into a manual band winding machine, manually winding the band on an annealing plate, placing the annealing plate into a vacuum box type annealing oven, and annealing under an oxygen atmosphere according to annealing processes. The method has characteristics of low cost, short annealing time, high production efficiency, high temperature controlling precision, and capability of uniformly annealing each part of the superconductive long band. Furthermore, compared with the traditional non-vacuum annealing oven, the purity of the oxygen atmosphere in the annealing oven isgreatly increased through a vacuumizing method, so that adverse effects of N2, NO, NO2, CO, CO2 and other non-oxygen impurity gas in the residual air in an annealing furnace on the performance of thesuperconductive long band under the high temperature in the annealing process are avoided. By the method, the rare earth oxide second generation high-temperature superconductive band subjected to annealing treatment under the oxygen atmosphere has excellent superconductive performance.

Description

technical field [0001] The invention relates to a simplified high-efficiency and low-cost high-temperature superconducting long-band annealing method. Background technique [0002] Since the discovery of new oxide high-temperature superconductors in 1986, the field has made great progress. Since the yttrium barium copper oxide superconductor (YBCO) has a very high irreversible field in the liquid nitrogen temperature region (77K), the strip made of this material has a strong high current carrying capacity in a high field, making it in the electric power Applications, such as transmission cables, motors, energy storage and magnets, have broad application prospects. [0003] Compared with traditional metal low-temperature superconductors, high-temperature superconductors belong to oxide materials, and in terms of their mechanical properties, they belong to the series of "oxide ceramics". Therefore, compared with traditional low-temperature superconductor materials, they are n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/00
Inventor 李贻杰
Owner SHANGHAI SUPERCONDUCTOR TECH CO LTD
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