JPS63290294A - Production of superconducting wire by electroplating under high pressure - Google Patents

Abstract

PURPOSE:To produce a superconducting wire having very low electric resistance under ordinary temp. and enabling the flow of large electric current by increasing the internal pressure of a plating cell and electroplating a fine conducting wire as the cathode to deposit a metal on the wire. CONSTITUTION:High pressure oil is fed to a pressurizing chamber 12 through a piping member 16 by driving a motor 17 to raise the internal pressure of the chamber 12. By the raised pressure, a partition wall 5A is pressed in the direction of arrows 12A to increase the internal pressure of a plating cell chamber 11. This pressure is regulated to about 1,000kg/cm<2> with a relief valve 23. DC is then supplied between electrodes 7, 7' as the anode and a fine conducting wire 8 as the cathode through cabtire cords 30, 31 to decompose copper sulfate in an aq. soln. 32 in the chamber 11 and to deposit and grow copper molecules on the cathode 8. Thus, a conducting wire having intermolecular bond formed at very low temp. is obtd. The electric resistance of the wire is very low even at ordinary temp. and large electric current can be allowed to flow through the wire.

Description

[Detailed description of the invention] The present invention relates to a method of manufacturing superconducting wire.

Conventionally, conductors such as niobium-germanium alloys have been processed at ultra-low temperatures (
When the temperature is lowered to -250 degrees Celsius or lower), the electrical resistance of the conductor becomes zero and it becomes possible to flow a current of υ, but in order to lower the conductor to an ultra-low temperature, it is necessary to liquefy it at an ultra-low temperature. There are problems such as the need for liquid helium, etc., which is heated to a high temperature, and the volume of the containers and equipment used to keep the ultra-low gamma hot is large.Additionally, the liquid helium gradually evaporates and decreases, so it must be replenished. , which could only be used experimentally in a few fields. The manufacturing cost of liquid helium was also high.

Recently, various research and development efforts have been made on ceramic superconducting materials made by sintering cupric oxide, iJium oxide, barium carbonate, etc., and the ultralow temperature at which superconductivity occurs is gradually increasing. The necessity of using liquid helium instead of liquid helium, which can be manufactured at a lower cost, is the same as in the past, and the problems of manufacturing into long wires and coils have not been resolved. , has not been put into practical use.

The present invention solves such conventional problems and enables superconductivity at room temperature without lowering the conductor to an ultra-low temperature, without requiring a container or equipment to keep it warm, or with ultra-low-temperature liquid nitrogen. The purpose of this research is to provide a superconducting wire with high performance.

The present invention provides a high-pressure plating tank that can withstand high pressure from inside.
A plated metal is placed on the anode side, a thin conductive wire that becomes a thick wire is placed on the cathode side, the plating tank is kept under high pressure, and the plated metal is deposited on the 9-element conductive wire by electroplating and multiplied. This is a method of manufacturing superconducting wire by

Hereinafter, the present invention will be explained in detail based on drawings shown in examples.

In the drawing, 6 and 10 form a high-pressure plating tank made of iron that can withstand high pressure from inside, and the joint between 6^ and IOA is a 7-land type, and is fixed with bolts, etc. .

Next, 3 and 5 are insulators made of materials such as polyethylene that are acid-resistant and have insulation ability, and are used in the high-pressure plating tank 6.
and 10 so as to be in close contact with the inner surfaces thereof. However, without contacting the inner surface 6B of the lower end of the high-pressure plating tank 6,
A predetermined interval is provided so as to form a pressurized chamber 12.

The lower end portion 5A of the insulator 5 is coated with the high pressure plating baths 6 and 10.
Part of the partition wall 5A is formed into a bellows shape as shown in 5B, to serve as a partition wall to divide the inside of the tank into a pressurizing chamber 12 and a plating tank chamber 11. Tapered hole 25.25' that tapers toward the outside for high-pressure plating.
and 26 are provided. Said tapered hole 25.
A support member 1°1' made of a conductive material such as steel is attached to 25' to hold the anode 7.71 and to conduct electricity. High-pressure plating bath I for the support member 1.1'
The mounting section with O is formed into a tapered shape with a slightly smaller diameter, the same as the taper angle of the tapered hole 2525'. 28 and 28' are made of acid-resistant and insulating material, such as polyethylene molded like the insulator 6, which insulates the high-pressure plating tank 10 and the support member 1°1' and prevents pressure leakage. It is an insulating seal member that serves to prevent
It is formed into a tapered pipe so as to fit in the gap between the hole 25.25' and the support member 1.1'.

Further, the hole 26, the support member 2, and the insulating seal member 29 are also constructed in the same manner as described above.

4 is an acid-resistant sealing member inserted between the high-pressure plating tanks 6 and 10. 9 is made of a non-conductive material;
A holding member is connected to each of the anodes 7 and 7' and the cathode 8.

The plating tank chamber 11 is filled with an aqueous solution containing, for example, sulfuric acid steel (CuSO4.5H,O) in a ratio of 904 and sulfuric acid (H, 5O4) in a ratio of 210. Next, the pressurizing device will be described. Reference numeral 13 denotes a joint fitting attached to the hydraulic input port 14 at the lower end of the high-pressure milling tank 6. 15 is a pressure gauge, and 17 is an electric motor that drives the hydraulic pump section 18. The skewer is a hydraulic oil outlet. The fitting 13, the hydraulic oil discharge port 18A, and the pressure gauge 15 are connected to each other by a piping member 16. 18B is a hydraulic oil suction port, which is piped to the oil tank 20 with a piping member 19. Next, 23 is a pressure adjustment relief valve, which is attached to the pressure adjustment port 25 at the lower end of the high-pressure plating tank 6. 23^ is an oil outlet. A piping member 22 is piped from the outlet 23^ to the oil tank 20 in order to return the blown oil to the oil tank 20.

24 is a knob handle for adjusting the pressure adjustment I717-f valve 23 y4. High-pressure hydraulic oil 33 is injected into the pressurizing chamber 12, the oil tank 2D, and the piping members 16 and 19.

30 and 31 are cabtyre cords from the electric control panel.

The present invention is constructed as described above. First, the hydraulic pump section 18 is operated by the drive of the electric motor 17, and high-pressure oil is pumped from the hydraulic oil outlet 18A to the piping member 16, the joint fitting 13, and the hydraulic oil input port. Pressure chamber 1 through 14
2, and the pressure inside the pressurizing chamber 12 increases.

Then, at the same time as the pressure inside the pressurizing chamber 12 increases, the partition wall 5A presses the aqueous solution 32 in the plating tank chamber 11 in the direction of the arrow 12A, and the pressure in the plating tank chamber 11 also increases.

The pressure adjustment relief valve 23 is set, for example, to set the IJ17 pressure to L000, and the inside of the plating tank chamber is
It becomes pressurized to 1.000Kp/.

Next, when direct current is applied so that the cabtyre cord 30 is positive and the cabtyre cord 31 is negative, the sulfuric acid steel in the aqueous solution 32 is electrochemically decomposed by electrochemical plating action in the plating bath, and the copper molecules are converted into original. It precipitates on line i and multiplies over time.

In this way, by electroplating in a high-pressure plating bath, a metal with good conductivity such as copper is deposited and multiplied on the original wire on the cathode side, and the bonds between molecules are formed when the temperature is lowered to an ultra-low temperature. It becomes a conductive wire in a similar state, and has minimal electrical resistance even at room temperature, making it possible to flow a large current.

The illustrated embodiment of the present invention is an experimental device, and the conductive wire obtained on the cathode side has a short length of about 1 m. However, the present invention is not limited to the illustrated embodiment, and the gist of the present invention is You are free to change the design as long as you do not deviate from it.For example, you can use a large high-pressure plating tank, electroplating the bobbin's original wire inside it, multiplying it, and winding it onto other bobbins. It is possible to produce long superconducting wires that are easy to use in practice by pulling out the conductive wires through a sealing member to the outside of the high-pressure plating tank.

In addition, the pressurization method is not limited to hydraulic pressure, but can also be pressurized by water pressure, and it is also possible to directly pressurize the inside of the high-pressure plating tank and send the plating solution into the plating tank chamber. It is.

In this way, the superconducting wire manufactured by the manufacturing method of the present invention is capable of passing a large current at room temperature, so there is no need for liquid helium, liquid nitrogen, heat insulating equipment, containers, etc. to lower the temperature to ultra-low temperatures as in the past. Therefore, it can be used in a wide range of fields.

For example, ■Electricity loss when transmitting electricity from a power plant to a consumption area will be extremely small.

■It is possible to downsize and improve the performance of electrical equipment such as electric motors, transformers, and electromagnets.

■The invention had great effects, such as making it possible to put the Su-Ya motor car and superconducting power generation device into practical use.

[Brief explanation of the drawing]

The drawing is a sectional view of a main part showing an embodiment of the present invention. 1, 1? 2. is a supporting member. 3.5. is an insulating material. 4. is a seal member. 7.7? is the anode. a is the cathode. 9. is a holding member. 11. Plating tank room. 12. is a pressurized chamber.

Claims (1)

[Claims] A plating metal is installed on the anode side of a high-pressure plating tank that can withstand high pressure from inside, and a thin conductive wire that serves as the base wire is installed on the cathode side. A method of manufacturing superconducting wire by depositing and multiplying plating metal on conductive wire.