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Low ac-loss multi-filament type superconductive wire material, and manufacturing method thereof

A technology of superconducting wire and manufacturing method, which is applied in the direction of superconducting magnet/coil, cable/conductor manufacturing, usage of superconducting elements, etc., can solve problems such as superconducting burnout, achieve high effect, reduce AC loss, and good productivity Effect

Active Publication Date: 2012-07-18
SWCC SHOWA CABLE SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When a quench occurs, the superconductor may burn out

Method used

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  • Low ac-loss multi-filament type superconductive wire material, and manufacturing method thereof
  • Low ac-loss multi-filament type superconductive wire material, and manufacturing method thereof
  • Low ac-loss multi-filament type superconductive wire material, and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0113] 0.5 μm thick Gd 2 Zr 2 o 7 (GZO) is formed on one side of a strip-shaped Hastelloy (registered trademark) substrate with a width of 10 mm, and a 1 μm-thick CeO 2 film forming. Here, GZO and CeO 2 It is a layer called an intermediate layer or a buffer layer that exists between the non-oriented metal Hastelloy and the biaxially oriented superconducting layer. GdBa is formed on the intermediate layer with a thickness of 1.5 μm by the laser evaporation method (PLD method). 2 Cu 3 o 7 (RE123) A superconducting layer was further formed by sputtering to form a silver film with a thickness of 10 μm as a metal stabilization layer. For ease of use, a 10mm-width superconducting tape wire was cut into 5mm-width by laser cutting.

[0114] A polyester tape having a width of 5 mm and a thickness of 25 μm with an adhesive was attached to the formed silver layer (silver stabilization layer) for surface masking. The position of the first groove was formed by irradiating laser li...

Embodiment 2

[0118] 0.5 μm thick Gd 2 Zr 2 o 7 (GZO) is formed on one side of a strip-shaped Hastelloy (registered trademark) substrate with a width of 10 mm, and a 1 μm-thick CeO 2 Film formation (film formation of the intermediate layer). Here, for ease of use, it was cut to a width of 4.5 mm with a strip cutter. Form 1.2μm thick YBa on the intermediate layer by TFA-MOD method (Trifluoroacetate-metalorganic deposition) 2 Cu 3 o 7 (RE123) A superconducting layer, and silver was formed into a film with a thickness of 20 μm by a sputtering method as a metal stabilization layer.

[0119] A Kapton tape having a width of 5 mm and a thickness of 12 μm with an adhesive material was attached to the formed silver layer (silver stabilization layer) for surface masking. A laser beam was irradiated at a position 1477 μm away from the end so that the formed groove had a width of 140 μm and was divided into three in the width direction, so as to be the position of the first groove. Here, the wi...

Embodiment 3

[0123] Unoriented Gd by sputtering 2 Zr 2 o 7 A (GZO) bed layer is formed on one side of a 10mm-width strip-shaped Hastelloy (registered trademark) substrate with a thickness of 0.1 μm, and MgO double-layered layers are formed on it with a thickness of 0.01 μm using an ion beam-assisted sputtering method (IBAD method). Axial orientation, using the laser evaporation method (PLD method) to make 0.1μm thick La 2 MnO 4 (LMO) film, and then make 0.5μm thick CeO on it 2 film forming. Here, from GZO bed to CeO 2 layer is the middle layer. Form 1.0 μm thick GdBa on this intermediate layer by laser evaporation method (PLD method) 2 Cu 3 o 7 (RE123) A superconducting layer, and further, silver was formed into a film with a thickness of 10 μm by a sputtering method as a metal stabilization layer. For ease of use, a 10 mm width superconducting tape wire was cut into 5 mm widths by laser cutting.

[0124] A polyester tape having a width of 5 mm and a thickness of 25 μm with an a...

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Abstract

Disclosed is a low AC-loss multi-filament type superconductive wire material comprising a lengthy base material, an intermediate layer formed upon this base material, a superconductive layer formed upon this intermediate layer, and a metal stabilizing layer formed upon this superconductive layer. A plurality of slots, running along the longitudinal direction of the aforementioned base material, extending to the aforementioned intermediate layer from the aforementioned metal stabilizing layer via the aforementioned superconductive layer, and exposing the aforementioned intermediate layer, are formed in parallel in the width direction of the aforementioned base material, and the difference ([delta]d = d1 - d2) between the width (d1) of the aforementioned slots at the lower part of the aforementioned superconductive layer, and the width (d2); of the slots at the lower part of the aforementioned metal stabilizing layer is not more than 10 [mu]m.

Description

technical field [0001] The present invention relates to a composite filament type superconducting wire having a high effect of reducing AC loss and a method for producing the same. [0002] this application claims priority based on Japanese Patent Application No. 2009-250785 for which it applied to Japan on October 30, 2009, and uses the content here. Background technique [0003] Superconductors such as yttrium (Y)-based oxides can maintain a superconducting state within a range of conditions defined by critical temperature, critical current, and critical magnetic field. On the other hand, it is known that a so-called quench phenomenon occurs in a superconductor, that is, depending on the state, a local region becomes a normally conducting state during energization to generate heat, and the entire superconductor shifts to a normally conducting state. When a quench occurs, the superconductor may burn out. Therefore, in order to prevent burning of the superconductor, a stab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B12/06C01G1/00C01G3/00H01B13/00H01F6/06H01F36/00
CPCH01B12/06H01L39/143Y02E40/642H01L39/2467Y02E40/60H10N60/203H10N60/0688C01G1/00H01B13/00
Inventor 町敬人飞田浩史高桥保夫田边圭一和泉辉郎
Owner SWCC SHOWA CABLE SYST CO LTD