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ReBa2Cu3O7-[Delta] high-temperature superconducting-thin film strip attachment technology and pressure heating system thereof

A high-temperature superconducting thin film and heating system technology, which is applied in the direction of connection, connection contact materials, electrical components, etc., can solve the problems of affecting the efficiency of the connection process and increasing the connection time, and achieves easy popularization and application, fast operation, and high mechanical strength. Effect

Inactive Publication Date: 2016-08-03
SHANGHAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is necessary to increase the connection time at low temperature to ensure that the solder is fully melted to achieve a better connection effect, which affects the efficiency of the connection process

Method used

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  • ReBa2Cu3O7-[Delta] high-temperature superconducting-thin film strip attachment technology and pressure heating system thereof
  • ReBa2Cu3O7-[Delta] high-temperature superconducting-thin film strip attachment technology and pressure heating system thereof
  • ReBa2Cu3O7-[Delta] high-temperature superconducting-thin film strip attachment technology and pressure heating system thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] In this example, see Figure 1 to Figure 6 , a connection ReBa 2 Cu 3 o 7-δ The pressure heating system for high-temperature superconducting thin film strips is composed of a pressure device A and a heating device B. The pressure device A is composed of an upper pressing block 6, a lower pressing block 7 and a pressing mechanism. The upper pressing block 6 and the lower pressing The gap between block 7 acts as a clamp for two ReBa 2 Cu 3 o 7-δ In the working area of ​​the overlapping part of the high-temperature superconducting film strip, the lower pressing block 7 is fixedly installed on the base 8, and the pressing mechanism is symmetrically and evenly arranged on the ReBa 2 Cu 3 o 7-δ The force applying rod mechanisms on both sides of the high temperature superconducting film strip form a balanced force applying system. Each force applying rod mechanism is composed of a pressure spring 9, a screw rod 10 and a nut 11. The pressure spring 9 is set on the screw ...

Embodiment 2

[0042] This embodiment is basically the same as the embodiment, and the special features are:

[0043] In this example, see Figure 6 , ReBa 2 Cu 3 o 7-δ The joining process of high-temperature superconducting thin film strips comprises the following steps:

[0044]a. Take two ReBCO high-temperature superconducting thin film strips with double-sided copper-plated protective layer 1 to be connected, and determine the superconducting surface and basal surface of the strips according to the surface morphology of the ReBCO high-temperature superconducting thin film strips to be connected. Prepare for the overlapping of the "superconducting face to the superconducting face" of the ReBCO high temperature superconducting thin film tape;

[0045] b. Strip connection pretreatment: After judging the superconducting surface of the strip according to step a, use W7 (05) metallographic sandpaper to check the superconductivity of the two ReBCO high temperature superconducting film str...

Embodiment 3

[0050] This embodiment is basically the same as the previous embodiment, and the special features are:

[0051] In this example, see Figure 6 , ReBa 2 Cu 3 o 7-δ The joining process of high-temperature superconducting thin film strips comprises the following steps:

[0052] a. Two ReBCO high-temperature superconducting thin film strips with double-sided Ag-plated protective layer 1 to be connected are taken, and the superconducting surface and basal surface of the strip are determined according to the surface morphology of the ReBCO high-temperature superconducting thin film strips to be connected. Prepare for the overlapping of the "superconducting face to the superconducting face" of the ReBCO high temperature superconducting thin film tape;

[0053] b. Strip connection pretreatment: this step is the same as in Embodiment 1;

[0054] c. SnBi alloy solder paste is coated on the polished part of the ReBCO high temperature superconducting thin film strip to be connecte...

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Abstract

The present invention discloses a ReBa2Cu3O7-[Delta] high-temperature superconducting-thin film strip attachment technology and a pressure heating system thereof. The ReBa2Cu3O7-[Delta] high-temperature superconducting-thin film strip attachment technology and the pressure heating system thereof are able to conveniently and rapidly connect two ReBCO high-temperature superconducting-thin film strips together to obtain a connection strip with low resistance of a joint resistor, good mechanical property, good strip superconductivity and mostly unchanged connection. Low-temperature welding flux is employed in the connection process, is heated for 5 to 30mins at the temperature in the range of 150-300 DEG C, is pressed and reinforced once again at the temperature in the range of 150-200 DEG C, and is rapidly cooled while being subjected to natural cooling at the temperature in the range of 100-160 DEG C. The ReBa2Cu3O7-[Delta] high-temperature superconducting-thin film strip attachment technology and the pressure heating system thereof are able to easily realize the joint resistance with 10-8 [Omega] magnitude when the splicing length is 1-5cm, when the splicing length is further increased, the joint resistance is continuously reduced, and when the splicing length is increased to 5-10cm, the resistance with n[Omega] magnitude is successfully realized. The ReBa2Cu3O7-[Delta] high-temperature superconducting-thin film strip attachment technology is rapid, efficient, easy to operate and good in splicing effect, and is suitable for popularization and application.

Description

technical field [0001] The invention relates to a connection process and device for superconducting materials, in particular to a connection process for high-temperature superconducting film strips, which is suitable for superconducting cables and superconducting motors composed of second-generation high-temperature superconducting film strips. , and strip welding in technical fields such as superconducting transformers, which belong to the technical field of superconducting electrical engineering. Background technique [0002] Superconducting tape can achieve low loss, has many advantages such as high critical temperature, strong current carrying capacity, low operating cost, small footprint, and good mechanical properties. Compared with the first generation of superconducting tape, it has strong commercial value , especially the second-generation high-temperature superconducting material ReBCO, namely ReBa 2 Cu 3 o 7-δ Thin film strip, in the chemical formula Re=Y, Gd o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01R43/02H01R4/68
CPCH01R43/02H01R4/68
Inventor 郑佳会马洪良蔡传兵鲁玉明
Owner SHANGHAI UNIV
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