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The joining process of ybco high temperature superconducting thin film strip and its special auxiliary fixture

A high-temperature superconducting thin film and superconducting strip technology, which is applied in the usage of superconducting elements, superconducting devices, superconducting/high-conducting conductors, etc., can solve the problem of increasing connection time, affecting the efficiency and quality of connection process, and joint resistance Small problems, to achieve the effect of good mechanical strength, fast connection process operation, low joint resistance value

Active Publication Date: 2016-12-07
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 2. The resistance of the joint should be as small as possible, and the mechanical properties of sufficient strength must be guaranteed;
However, it is necessary to increase the connection time at low temperature, which affects the efficiency and quality of the connection process

Method used

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  • The joining process of ybco high temperature superconducting thin film strip and its special auxiliary fixture
  • The joining process of ybco high temperature superconducting thin film strip and its special auxiliary fixture
  • The joining process of ybco high temperature superconducting thin film strip and its special auxiliary fixture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] In this example, see Figure 1~Figure 6 , fast and efficient connection of YBCO high temperature superconducting thin film tape process, the specific process steps are:

[0035] Step 1: Distinguish the superconducting surface and the basal surface of the strip according to the surface morphology of the YBCO high temperature superconducting thin film strip to be connected, such as figure 1 As shown, the judgment method is: if only one side is coated with silver protective layer 3, then this surface is YBCO superconducting layer 2, and the other side of YBCO superconducting layer 2 is the buffer layer and base layer 1; if both sides are coated with If there is a silver protective layer 3, use an electric soldering iron to remove the silver layer on the surface. The shiny black side is the YBCO superconducting layer 2; One side is the YBCO superconducting layer 2, and the outwardly curved side is the buffer layer and the base layer 1;

[0036] Step 2: Apply flux to the s...

Embodiment 2

[0043] This embodiment is basically the same as Embodiment 1, especially in that:

[0044] In this example, see Figure 6 , fast and efficient connection of YBCO high temperature superconducting thin film tape process, the specific process steps are:

[0045] Step 1: This step is the same as Embodiment 1;

[0046] Step 2: Apply flux to the superconducting surface side of the two strips respectively. Under the temperature condition of 150°C, apply the rosin flux 9 evenly on the superconducting surface side of the two strips with an electric soldering iron, according to The actual overlapping area determines that the coating length is 3cm; then, place a solder 8 of Sn43Bi57 with a melting point of 138°C on the rosin-coated part of one of the strips, and the two ends of the solder 8 placed along the extending direction of the strip exceed the coated rosin. 0.5cm at both ends of the applied flux 9, and then place another strip with the rosin-coated side down on the solder 8, so ...

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Abstract

The invention discloses an YBCO high-temperature superconductive film band connection technology and a special-purpose auxiliary clamp thereof. Through the specific connection clamp and its technological parameter, two high-temperature superconductive film bands are rapidly connected by a low temperature solder in short time, and low joint resistance value and good mechanical strength are provided. The whole technological parameter can be accurately optimized, for the solder with melting point lower than 140 DEG C, the welding temperature approaches to 155 DEG C, heating time is 20 minutes, and the clamp temperature is cooled to 129 DEG C and is placed on a steel plate for rapidly cooling. Through the above parameters, joint resistance magnitude order can reach 10<-7> omega even connection length is 1cm, and the resistance value can be lower if the connection length is greater than 1cm. The connection technology of the YBCO high-temperature superconductive film band has the advantages of rapid, convenient operation, high efficiency, low temperature during the connection process and short time, and is suitable for industrial application.

Description

technical field [0001] The invention relates to a connection method and an auxiliary connection tool for superconducting materials, in particular to a welding connection method and an auxiliary connection tool for high-temperature superconducting thin film strips, which are suitable for superconducting materials composed of second-generation high-temperature superconducting thin film strips. Conductive cables, superconducting motors, and superconducting transformers, etc., belong to the technical field of superconducting electrical engineering. Background technique [0002] The superconducting tape can realize many advantages such as low loss, super current carrying capacity, and small footprint, especially the second-generation high-temperature superconducting YBCO thin film tape, whose critical temperature can be around 90K, which is enough to meet the requirements of the tape in liquid nitrogen. Compared with the operation of the first generation of superconductors in liq...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B12/00C04B37/00
CPCY02E40/60
Inventor 蔡传兵张子辰马洪良郑佳会
Owner SHANGHAI UNIV