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Preparation method of high porosity metal porous carrier materials

A carrier material, metal porous technology, applied in the direction of coating, etc., can solve the problems of low porosity of porous materials, difficult to maintain the shape of the material, collapse, etc., to achieve the effect of improving porosity and through porosity, and good performance.

Inactive Publication Date: 2007-08-01
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the influence of factors such as the "arch bridge effect" of the powder, individual pores will be quite large after sintering, the pore distribution will be uneven, the pore size is difficult to control, and it is prone to collapse during sintering, and the shape of the material is difficult to maintain.
However, the porosity of porous materials usually pressed and sintered by powder is generally low, and the highest can only reach 40%.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The total amount of pore-forming agent added is 5wt%, wherein carboxymethyl cellulose (CMC) and urea CO (NH 2 ) 2 The ratio is 1:3, uniformly mixed with metal nickel powder with a particle size of less than 75 μm, mechanically pressed, and sintered under vacuum. The final sintering temperature is 900 ° C, and the holding time is 3.5 hours to obtain 1# sample.

Embodiment 2

[0016] The total amount of pore-forming agent added is 10wt%, wherein carboxymethyl cellulose (CMC) and urea CO (NH 2 ) 2 The ratio is 1:5, uniformly mixed with metal nickel powder with a particle size of less than 75 μm, mechanically pressed and molded, and sintered in a hydrogen atmosphere. After 3.5 hours, 2# sample was obtained.

Embodiment 3

[0018] The total amount of pore-forming agent added is 10wt%, wherein carboxymethyl cellulose (CMC) and urea CO (NH 2 ) 2 The ratio is 1:15, uniformly mixed with metal nickel powder with a particle size of less than 45 μm, mechanically pressed and molded, sintered in a hydrogen atmosphere, the low temperature holding temperature is 150 ° C ~ 250 ° C, the final sintering temperature is 880 ° C, and the holding time is 2.5 Hour, get 3# sample.

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PUM

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Abstract

A high void rate metal porous carrier material preparation method relates to the preparation method of metal porous body with high void rate, small aperture for adsorbing and storing special material, accelerant carrier in the field of astronavigation and environmental protection. It is characterized by: the preparation process coats the metal powder with pore-creating agent to preparing coating powder, then prepares porous metal carrier material after pressing, shaping and sintering. The method of the invention mixes the metal powder and pore-creating agent uniformly to forming the coating powder, then prepares metal porous carrier material after pressing, shaping and multi-stage insulation sintering. It reaches the aims of high porosity, small aperture and high via hole rate through adding pore-creating agent and reducing the contact face between powder and particles, prepares metal porous carrier material with excellent property which porosity>60%, aperture<35 mum and via hole rate >=95%.

Description

technical field [0001] The invention relates to a preparation method of a metal porous carrier material with high porosity, which relates to a preparation method of a metal porous body with high porosity and small pore diameter, which is used for adsorption and storage of special substances in the field of aerospace and environmental protection, and catalyst carrier. Background technique [0002] Porous metal materials have the characteristics of high strength, thermal shock resistance, high temperature resistance, and regeneration, and are mainly used in aerospace, aviation, petrochemical, medical, construction and other fields. Powder metallurgy is the most important method for preparing porous metal materials. Because the powder sintered metal porous material has the advantages of high strength, uniform pore size, easy control, high porosity, large specific surface of the porous body, etc., it is widely used as a carrier material in addition to filter materials. The poro...

Claims

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Application Information

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IPC IPC(8): B22F3/11B22F1/02C22C1/08
Inventor 汤慧萍李来平李程许忠国
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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