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Micro-porous metal film prepn. method

A metal film and microporous technology, which can be used in devices and coatings for coating liquids on the surface, which can solve the problems of complex preparation process, peeling, and long cycle.

Inactive Publication Date: 2007-04-18
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the preparation technologies of inorganic separation membranes mainly include "slip-casting" coating film formation by pulling device, wet powder spraying deposition (wet powder spraying) film formation and powder slurry casting film formation technology. Control the thickness of the film layer and the uniformity of the film layer, and when the pore size of the support is large and the pore size of the film layer is small, the film layer is prone to cracks, peeling or partial shedding after sintering, and it is often necessary to prepare a transition layer or even Multiple transition layers avoid the above phenomena, and the preparation process is complicated and the cycle is long

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0024] First, put the supporting tubular metal support tube into the inner cylinder of the centrifugal deposition rotating cylinder, and add the configured stainless steel film powder suspension to the inner cylinder to seal, adjust the positioning of the bearing mechanism through the centering mechanism and fix the bearing mechanism, and then start The speed change mechanism adjusts the appropriate speed through the setting of the control cabinet parameters to achieve the required speed change and finally drives the bearing mechanism to run smoothly, thereby providing a suitable centrifugal field to achieve the gradient deposition of suspended particles. The microstructure of the prepared stainless steel membrane is shown in Figure 3. The average pore size of the membrane layer measured by the PMI capillary flow analyzer is 1.0 μm, and the relative air permeability of the filter tube measured by the FBP-3I porous material tester is 120m 3 / (m2.h.Kpa).

Embodiment 2

[0026] The steps are the same as in Example 1, and the titanium film is prepared. Its microstructure is as shown in Figure 4. The average pore diameter of the film layer tested by the PMI capillary flow analyzer is 0.7 μm, and the filter tube is tested by the FBP-3I porous material tester. The relative air permeability coefficient is 170m 3 / (m2.h.Kpa).

Embodiment 3

[0028] The steps are the same as in Example 1, and the microporous titanium sheet is prepared. The maximum pore diameter of the filter tube tested by the FBP-3I porous material tester is 6.08 μm, the relative air permeability coefficient is 14.6m3 / (m2.h.Kpa), and the thickness is 0.2 mm with a porosity of 30%.

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Abstract

A process for preparing millipore metallic film used for filter, separator, catalyzing, fluid distributor and mass or heat transfer includes such steps as providing a centrifugal drum with a porous substrate fixed on its inner surface, preparing slurry from raw powder, loading the slurry in the centrifugal drum, and high-speed rotating to centrifugally form a gradient millipore film on the inner surface of said porous substrate.

Description

technical field [0001] A method for preparing a microporous metal membrane, which relates to the preparation of a microporous metal membrane used in the fields of petroleum, chemical industry, energy, environmental protection, food, pharmacy and other functions such as filtration, separation, catalysis, fluid distribution, mass transfer and heat transfer Preparation. Background technique [0002] Membrane separation and membrane technology is one of the six high-tech in the 21st century. As a new type of separation medium, inorganic membranes have a series of unique advantages compared with organic membranes, such as high temperature resistance, good chemical stability, and high mechanical strength. Inorganic membranes mainly include ceramic membranes and metal membranes. However, compared with ceramic membranes, metal membranes have high mechanical strength, excellent thermal conductivity, good toughness, can be welded and sealed, and overcome the shortcomings of ceramic m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D1/00B22F7/00
Inventor 汤慧萍张钱城王建永汪强兵李增峰
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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