Method for preparing porous oxide film on metal carrier surface

A technology of porous oxide and metal carrier, which is applied in the coating process of metal materials, coating, etc., can solve the problems of shortening the drying process time of the film layer and reducing the sintering temperature of the film layer, so as to shorten the process time, reduce the sintering temperature, The effect of ensuring stability

Active Publication Date: 2015-05-20
WESTERN BAODE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method uses oxides and oxide sols. During the sintering process, the oxide sols are transformed into oxide particles with a particle size of several nanometers. As one of the main sources of the liquid phase in the subsequent sintering process, it improves the film formation process. The film-forming performance of the porous oxide on the surface of the metal carrier avoids the problems such as corrosion caused by the electrochemical reaction caused by the use of the hydrosol system during the drying of the film layer, shortens the process time of the film layer drying, and reduces the sintering temperature of the film layer , the prepared porous oxide film is well bonded to the metal substrate; the oxide forms pores through the stacking and overlapping of particles, and the particle size and content changes can adjust the viscosity of the slurry and the pores in the porous oxide film. Pore ​​Size and Porosity

Method used

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  • Method for preparing porous oxide film on metal carrier surface
  • Method for preparing porous oxide film on metal carrier surface
  • Method for preparing porous oxide film on metal carrier surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Prepare a porous titanium oxide film on the surface of porous titanium with a porosity of 20%. The specific method comprises the following steps:

[0037] Step 1, performing conventional pickling treatment on the porous titanium to remove scale and impurities on the surface of the porous titanium;

[0038]Step 2, select oxide (titanium dioxide) and oxide sol (titanium dioxide sol) according to the porous titanium oxide film to be prepared, then mix the following raw materials by mass percentage to make slurry: titanium dioxide 20%, titanium dioxide sol 45% , polyethylene glycol (PEG2000) 25%, mass percent concentration is 0.2% PVB ethanol solution 8%, volume percent concentration is 5% glycerol ethanol solution 1.5%, boron oxide 0.5%; in the titanium dioxide sol The concentration of titanium dioxide is 0.5mol / L;

[0039] Step 3, coating the slurry described in step 2 on the surface-treated porous titanium surface in step 1 by spraying;

[0040] Step 4. Dry the porous ...

Embodiment 2

[0044] Prepare a porous aluminum oxide film on the surface of 316L stainless steel with a porosity of 30%, and the specific method includes the following steps:

[0045] Step 1. Carry out conventional sandblasting (shot) treatment to 316L stainless steel to remove scale and impurities on the surface of 316L stainless steel;

[0046] Step 2, select oxide (Al2O3) and oxide sol (Al2O3 sol) according to the porous alumina film to be prepared, then mix the following raw materials by mass percentage to make slurry: 30% aluminum, 50% aluminum oxide sol, 15% polyethyleneimine, 5% PVB ethanol solution with a mass percentage concentration of 0.2%; the concentration of aluminum oxide in the aluminum oxide sol is 0.025mol / L;

[0047] Step 3, coating the slurry described in step 2 on the surface-treated 316L stainless steel surface in step 1 by dipping and pulling;

[0048] Step 4. Dry the 316L stainless steel covered with slurry in step 3 at 80°C for 24 hours, then place it in a sinter...

Embodiment 3

[0052] Prepare a porous zirconia film on a porous copper surface with a porosity of 25%, and the specific method comprises the following steps:

[0053] Step 1, carrying out conventional pickling treatment to the porous copper to remove oxide skin and impurities on the surface of the porous copper;

[0054] Step 2, select oxide (zirconia) and oxide sol (zirconia sol) according to the porous zirconia film to be prepared, then mix the following raw materials by mass percentage to make slurry: zirconium dioxide 20 %, 50% of zirconium dioxide sol, 15% of stearic acid, 10% of ethanol solution of phenolic resin with a mass percent concentration of 10%, 5% of copper oxide; the concentration of zirconium dioxide in the zirconium dioxide sol is 1mol / L;

[0055] Step 3, coating the slurry described in step 2 on the surface-treated porous copper surface in step 1 by spraying;

[0056] Step 4. Dry the porous copper covered with slurry in step 3 at 80°C for 24 hours, then place it in a ...

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Abstract

The invention discloses a method for preparing a porous oxide film on a metal carrier surface. The method comprises the following steps: I, performing surface processing on a metal carrier to remove oxide skin and impurities on the surface of the metal carrier; II, selecting oxide and oxide sol according to a to-be-prepared porous oxide film, and then uniformly mixing raw materials to prepare slurry; III, coating the slurry to the surface of the surface-treated metal carrier; IV, drying and putting the metal carrier in a sintering furnace, preserving the temperature and sintering under a reducing atmosphere, and obtaining a porous oxide film with thickness not larger than 100 microns on the surface of the metal carrier after cooling with the furnace. The method improves the film-forming performance of the porous oxide on the metal carrier surface in the film-forming process, avoids problems of corrosion and the like as electrochemical reaction is possibly caused by adopting a water-soluble sol system during a film layer drying period, shortens the film-layer drying process time, and reduces the sintering temperature of the film layer. The prepared porous oxide film is bonded with the metal substrate very well.

Description

technical field [0001] The invention belongs to the technical field of preparation of porous oxide films, and in particular relates to a method for preparing porous oxide films on the surface of a metal carrier. Background technique [0002] The porous oxide film material on the surface of the metal carrier has the characteristics of high reliability, weldability, high temperature resistance, corrosion resistance, good heat dissipation and good thermal shock resistance, and is widely used as a filter material in high-precision food, petrochemical and other industries , Chemical catalyst carrier, etc. At present, the common process methods for preparing such materials are as follows: [0003] (1) Sol-gel method (SOL-GEL method) [0004] In the method, a metal alkoxide is hydrolyzed at a certain temperature to form a stable sol, and then a pore-forming agent is added to the sol, and then the surface of a metal carrier is coated to form a film, and the metal film is obtained ...

Claims

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Application Information

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IPC IPC(8): C23C26/00
Inventor 刘荣臻李荣吴引江段庆文南海娟
Owner WESTERN BAODE TECH CO LTD
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