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Hydrogen separation membrane and process for producing the same

A technology for hydrogen separation membranes and production methods, applied in the field of metal foils, capable of solving the problems of low ductility, reduced hydrogen permeability, lack of processability and durability of vanadium alloy foils and niobium alloy foils

Inactive Publication Date: 2006-03-29
FUKUKA METAL FOIL & POWDER CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, vanadium alloy foils and niobium alloy foils formed by rolling have low ductility and lack of workability and durability
[0006] Here, for niobium alloy foils, it is known to add Ta, Co, Mo, Ni, etc. in order to improve resistance to hydrogen embrittlement (see, for example, Japanese Laid-Open Patent Publication 2000-159,503), but problems arise in the case of Ni , for example, in the production of niobium alloy foils according to the cold rolling method, when the ratio of Ni to niobium exceeds 10% to 20% by weight, the hydrogen permeability is significantly reduced

Method used

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  • Hydrogen separation membrane and process for producing the same
  • Hydrogen separation membrane and process for producing the same
  • Hydrogen separation membrane and process for producing the same

Examples

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Embodiment

[0040] use has figure 1 The single-drum alloy foil production unit with the structure shown in the figure is used to manufacture niobium alloy foil.

[0041] The crucible 1 is made of boron nitride-based ceramics, and has a slit with a width of 0.4 mm and a length of 30 mm. The drum 2 is made of copper and has dimensions: a diameter of 300 mm and a length of 80 mm. The distance between the surface 5 of the drum and the slit 3 is 0.5 mm. Cool the tumbler with water. The number of rotations of the drum was set at 1500 rpm. A niobium alloy of 50Nb-40Ni-10Zr (atomic %) was placed in the crucible. The inside of the crucible is heated to 1750°C to completely melt the niobium alloy. Thereafter, argon gas was injected into the crucible so that the melt was ejected from the slit to form a foil layer on the surface of the drum, which was continuously peeled off from the drum so as to obtain a niobium alloy foil with a thickness of 0.03 mm (Example 1). The pressure inside the cruc...

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Abstract

A hydrogen permeation membrane exhibiting excellent hydrogen permeability and hydrogen embrittlement resistance, and a process for producing the same. This membrane is constituted of a niobium alloy foil having an amorphous crystal structure, the niobium alloy foil comprising 5 to 65 atomic % of at least one member selected from the group consisting of Ni, Co and Mo as a first additive element and 0.1 to 60 atomic % of at least one member selected from the group consisting of V, Ti, Zr, Ta and Hf as a second additive element together with the balance of Nb as an indispensable constituent element wherein 0.01 to 20 atomic % of Al and / or Cu may be contained as a third additive element. This alloy foil can be produced through a process comprising preparing a metal mixture of the above formulation, heating the metal mixture to the melting point or higher in an inert gas so as to melt the same and forming the melt into a film (foil) according to a liquid quenching technique.

Description

technical field [0001] The invention relates to a metal foil (niobium alloy foil) and a production method of the metal foil, the metal foil can be used as a hydrogen permeable membrane for a hydrogen refining unit, and the hydrogen refining unit is used for fuel Batteries and for fields related to semiconductors. Background technique [0002] In recent years, as a measure against global warming, practical application of a hydrogen refining unit and a fuel cell utilizing the hydrogen refining unit, and their distribution have been required. Such a hydrogen refining unit has first and second chambers, wherein the first chamber is separated from the second chamber by a membrane. Thus, when a gas containing hydrogen flows into the first chamber, the membrane acts to collect the hydrogen-rich gas in the second chamber while retaining the gas containing impurities such as CO and CO in the first chamber. 2 ) gas in this way is essentially permeable to hydrogen. For this reason, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D53/22B01D69/06C01B3/56B22D11/06B22D11/106B22D11/00B22D23/00C01B3/50
CPCC01B3/503B01D53/228B01D71/022B01D2323/12B22D11/106B01D2257/108B22D11/0611B01D71/02B01D53/22B01D69/06B01D71/02232B01D71/0221
Inventor 井上明久木村久道山浦真一西田元纪大河内均新保洋一郎
Owner FUKUKA METAL FOIL & POWDER CO LTD
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