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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

Active Publication Date: 2014-06-18
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sol-gel method is complicated, and the oxide particles formed are nano-scale, which easily enter the pores of the porous metal support, block the pores, and reduce the gas permeability of the porous metal support; although the vapor deposition method is carried out on the surface of the flat porous metal Successful plating, but does not solve the problem of uniform plating on the surface of porous metal tubes

Method used

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

Examples

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Comparison scheme
Effect test

Embodiment 1

[0023] The preparation method of the zirconia transition layer on the surface of the porous metal tube of the present embodiment comprises the following steps:

[0024] Step 1, mixing zirconium powder with a Fischer average particle size of 1.5 μm and deionized water, stirring evenly, and preparing a suspension 2; the solid content of the suspension 2 is 15%;

[0025] Step 2: Connect the two ends of the porous metal tube 5 with an outer diameter of 6 mm to the circulating water vacuum pump 1 with a polytetrafluoroethylene hose 3, and then immerse the porous metal tube 5 into the suspension 2 in step 1 , turn on the circulating water vacuum pump 1 for negative pressure suction for 3 minutes, the zirconium powder in the suspension 2 in step 1 is trapped on the outer surface of the porous metal tube 5, thereby forming a zirconium film on the outer surface of the porous metal tube 5, and then The porous metal tube 5 formed with a zirconium film on the outer surface is dried at roo...

Embodiment 2

[0029] The preparation method of the zirconia transition layer on the surface of the porous metal tube of the present embodiment comprises the following steps:

[0030] Step 1, mixing zirconium powder with an average Fischer particle size of 1.1 μm and absolute ethanol, stirring evenly, and preparing a suspension 2; the solid content of the suspension 2 is 12%;

[0031] Step 2. Connect the two ends of the porous metal tube 5 with an outer diameter of 4 mm to the circulating water vacuum pump 1 with a polyvinyl chloride hose 3, and then immerse the porous metal tube 5 into the suspension 2 in step 1. Turn on the circulating water vacuum pump 1 for negative pressure suction for 3 minutes, and the zirconium powder in the suspension 2 described in step 1 is trapped on the outer surface of the porous metal tube 5, thereby forming a zirconium film on the outer surface of the porous metal tube 5, and then The porous metal tube 5 with a zirconium film formed on the outer surface is dr...

Embodiment 3

[0035] The preparation method of the zirconia transition layer on the surface of the porous metal tube of the present embodiment comprises the following steps:

[0036] Step 1, mixing zirconium powder with a Fischer particle size of 0.8 μm and deionized water, stirring evenly, and preparing a suspension 2; the solid content of the suspension 2 is 5%;

[0037] Step 2: Connect the two ends of the porous metal tube 5 with an outer diameter of 8 mm to the circulating water vacuum pump 1 with a polypropylene hose 3, then immerse the porous metal tube 5 into the suspension 2 in step 1, and turn on the Circulating water vacuum pump 1 negative pressure suction 5min, the zirconium powder in the suspension 2 described in step 1 is trapped on the outer surface of the porous metal tube 5, thereby forms a zirconium film on the outer surface of the porous metal tube 5, then the outer surface The porous metal tube 5 with a zirconium film formed on the surface is dried at room temperature; th...

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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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/02B01D69/04B01D69/10
Inventor 康新婷黄瑜迟煜頔汤慧萍李广忠王建永葛渊谈萍荆鹏
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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