Preparation method of multi-hole metal tube surface zirconia intermediate layer

A porous metal and transition layer technology, applied in chemical instruments and methods, semi-permeable membrane separation, membrane technology, etc., can solve problems such as uniform plating on the surface of porous metal tubes, reduction of gas permeability of porous metal supports, complicated processes, etc. problems, to achieve the effect of preventing element diffusion, reasonable design, and simple preparation process
CN102755839AActive Publication Date: 2012-10-31NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
Publication Date
2012-10-31

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Abstract

The invention discloses a preparation method of a multi-hole metal tube surface zirconia intermediate layer. The preparation method comprises the following steps of mixing zirconium powder and water or absolute ethyl alcohol, evenly stirring to prepare powder suspension; enabling two ends of a multi-hole metal tube to be connected with a circulation water type vacuum pump through flexible tubes, then immersing the multi-hole metal tube in the powder suspension, opening the circulation water type vacuum pump to suck under negative pressure, holding the zirconium powder in the powder suspension on the surface of the multi-hole metal tube, forming a layer of zirconium film, and finally airing at room temperature; igniting one end of the zirconium film until combustion reaction spreads to the other end of the zirconium film to obtain the multi-hole metal tube surface zirconia intermediate layer. The preparation method does not need large scale equipment and is simple in process, simple and convenient to control, energy-saving and environment-friendly, and the multi-hole metal tube surface zirconia intermediate layer prepared by the preparation method can effectively reduce surface hole diameter of the multi-hole metal tube, improve bond strength of a zirconia film and the multi-hole metal tube and prolong service life of palladium composite film.
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Description

technical field

[0001] The invention belongs to the technical field of preparing a transition layer of a palladium composite membrane, and in particular relates to a method for preparing a transition layer of zirconia on the surface of a porous metal tube. Background technique

[0002] The palladium composite membrane developed in recent years, which attaches the palladium alloy membrane to the porous carrier, maintains the strength of the palladium composite membrane through the porous carrier, reduces the thickness of the palladium alloy membrane, and greatly improves the hydrogen permeability coefficient of the palladium membrane.

[0003] Porous supports mainly include porous ceramics and porous metals. In view of the disadvantages of porous ceramics such as fragility, poor processability, difficulty in connecting with components, and large difference in thermal expansion coefficient with palladium and its alloys, porous metal supports have become a current research hots...

Claims

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