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Preparation method of metal-base ceramic composite filter membrane

A ceramic composite and metal-based technology, which is applied in the field of membrane materials, can solve problems such as insufficient bonding, and achieve the effects of stable reusable performance, easy preparation process, and high compressive strength

Active Publication Date: 2012-06-20
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method aims at the problem that the combination of metal and ceramics is not strong enough. By forming an effective transition layer on the metal matrix, and then coating the transition layer to obtain a ceramic layer filter membrane, a metal matrix that is firmly bonded through the transition layer is obtained. / Ceramic composite filter membrane, the obtained composite filter membrane has a pore size of 10nm to 500nm

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Step 1. Select a metal titanium porous material with a pore size of 35 μm as the substrate, clean the substrate and dry it, and then uniformly coat a layer of titanium hydride powder with a thickness of 20 μm and a particle size of 2 μm on the surface of the substrate, and then coat the substrate with The matrix of titanium hydride powder was sintered under vacuum conditions at a temperature of 900°C for 1 hour to obtain a porous titanium metal film layer with a pore size of 1.5 μm;

[0023] Step 2, immerse the porous titanium metal film layer described in step 1 in the electrolyte, and anodize it for 5 minutes under the condition of an oxidation voltage of 20V to obtain an oxide nanoporous structure transition layer; the electrolyte is hydrofluoric acid and nitric acid The mixed aqueous solution, the volume percent concentration of hydrofluoric acid in the mixed aqueous solution is 0.3%, the volume percent concentration of nitric acid is 2.0%;

[0024] Step 3. Add tita...

Embodiment 2

[0029] This embodiment is the same as Embodiment 1, except that: the powder used is titanium alloy powder; the oxide powder used is alumina powder or zirconia powder.

[0030] The metal-based ceramic composite filter membrane prepared in this example has good processability and can be made into various shapes of filtering devices. It also has excellent chemical corrosion resistance, high compressive strength, and stable reusability. It can be used as a micro-nano filter membrane. The key components of size filtration and separation can be widely used in energy, machinery, electronics, chemical industry, atomic energy, medicine and health and other fields.

Embodiment 3

[0032] Step 1. Select 316L stainless steel porous material with a pore diameter of 28 μm as the substrate, clean the substrate and dry it, and then uniformly coat a layer of stainless steel powder with a thickness of 30 μm and a particle size of 1.6 μm on the surface of the substrate, and then coat the substrate with The matrix of stainless steel powder was sintered under vacuum conditions at a temperature of 1000°C for 3 hours to obtain a porous stainless steel metal film layer with a pore size of 0.8 μm;

[0033] Step 2, immerse the porous stainless steel metal film layer described in step 1 in the electrolyte, anodize 20min under the condition of oxidation voltage of 30V, obtain oxide nanoporous structure transition layer; Described electrolyte is ammonium fluoride, water A mixed solution with ethylene glycol, the concentration of ammonium fluoride in the mixed solution is 0.15M, and the concentration of water is 1.0M;

[0034] Step 3. Add titanium oxide powder with a parti...

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Abstract

The invention discloses a preparation method of a metal-base ceramic composite filter membrane. The method includes steps: firstly, uniformly coating powder on the surface of a porous matrix, and obtaining a porous metal membrane layer by means of sintering; secondly, soaking the porous metal membrane layer into electrolyte to be anodized and obtaining a transition layer; thirdly, adding oxide powder into dispersing agent to obtain coating liquid; fourthly, coating the coating liquid onto the transition layer and sintering the transition layer after the transition layer is dried; and fifthly,repeating the fourth step for a product after being sintered until a porous ceramic filtering membrane with the thickness ranging from 2mum to 80mum is obtained, and obtaining the metal-base ceramic composite filtering membrane. The problem that bonding is not firm enough when metal and ceramic are compounded is resolved, the effective transition layer is formed on the metal matrix, so that a ceramic layer is firmly bonded with the metal matrix, processability of the prepared composite filter membrane is good, and the composite filter membrane can be used for preparing filtering devices in various shapes, simultaneously, has excellent chemical attack resistance, is high in pressure resistance and stable in repeatability, and can be used as a key component for micro-nano filtering and separating.

Description

technical field [0001] The invention belongs to the technical field of membrane materials, and in particular relates to a preparation method of a metal-based ceramic composite filter membrane. Background technique [0002] Membrane technology is a new type of high-efficiency separation and purification technology. With its resource-saving and environment-friendly features, it has become one of the common supporting technologies to solve major problems such as the coordinated development of resources and the environment that humans are currently facing. Compared with organic membrane materials, inorganic membrane materials represented by metals and ceramics have shown outstanding performance in the field of deep purification in high temperature, high pressure and corrosive environments due to their advantages such as high temperature resistance, corrosion resistance, erosion resistance, high mechanical strength and stable structure. Broad application prospects. [0003] Comp...

Claims

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Application Information

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IPC IPC(8): B01D69/12B01D71/02B01D67/00
Inventor 汤慧萍李广忠向长淑李纲
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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