KR-20260066215-A - METHOD FOR MANUFACTURING HIGH-PURITY POROUS METAL MATERIAL AND A HIGH-PURITY POROUS METAL MATERIAL MANUFACTURED BY THE METHOD

Abstract

The present invention relates to a method for manufacturing a high-purity porous metal material and a high-purity porous metal material manufactured by the method. The method comprises a slurry manufacturing step of manufacturing a slurry for a porous metal material by mixing a metal component, a solvent, and a binder, and a sintering step of sintering the slurry manufactured in the slurry manufacturing step. By using PVB (POLYVINYL BUTYRAL) as the binder, a high-purity porous metal material can be manufactured with reduced content of residual impurities, namely carbon, after the sintering process, thereby improving the quality of the porous metal material and expanding the utility of the porous metal material.

Inventors

• 신종민
• 유동우
• 배충만
• 김연신
• 임민택

Assignees

• 주식회사 한화

Dates

Publication Date

20260512

Application Date

20241104

Claims (10)

1. A slurry preparation step for preparing a slurry for a porous metal material by mixing a metal component, a solvent, and a binder; and It includes a sintering step for sintering the slurry produced in the above slurry manufacturing step, and A method for manufacturing a high-purity porous metal material characterized in that the binder is PVB (POLYVINYL BUTYRAL).
2. In paragraph 1, The above slurry manufacturing step is, A method for manufacturing a high-purity porous metal material, characterized by comprising 20% to 90% by weight of a metal component, 5% to 70% by weight of a solvent, and 3% to 10% by weight of a binder in 100% by weight of the total porous metal material slurry.
3. In paragraph 1 or 2, A method for manufacturing a high-purity porous metal material characterized by manufacturing a porous metal material having a surface residual carbon concentration of 2.5 (At%) or less.
4. In paragraph 1, A method for manufacturing a high-purity porous metal material, characterized in that the above-mentioned slurry manufacturing step further includes a surfactant when manufacturing a slurry for a porous metal material.
5. In paragraph 4, A method for manufacturing a high-purity porous metal material, characterized in that the above surfactant is present in an amount of 0.5% to 4.0% by weight relative to 100% by weight of the total porous metal material slurry.
6. In paragraph 5, A method for manufacturing a high-purity porous metal material characterized in that the above surfactant is a nonionic surfactant.
7. A high-purity porous metal material characterized by being manufactured by a method for manufacturing a high-purity porous metal material according to any one of claims 1 to 6.
8. In Paragraph 7, A high-purity porous metal material characterized by a pore size within the range of 0.1㎛ to 200㎛.
9. In Paragraph 7, A high-purity porous metal material having a porosity in the range of 30% to 90% and in the form of a film or sheet with a thickness of 1000㎛ or less.
10. In Paragraph 7, A method for manufacturing a high-purity porous metal material characterized by a surface residual carbon concentration of 2.5 (At%) or less.

Description

Method for manufacturing a high-purity porous metal material and a high-purity porous metal material manufactured by the method The present invention relates to a method for manufacturing a high-purity porous metal material and a high-purity porous metal material manufactured by said method. Specifically, it relates to a method for manufacturing a high-purity porous metal material that reduces residual foreign substances after a sintering process by using PVB as a binder, and to a high-purity porous metal material manufactured by said method. In general, porous metal materials are metal materials containing numerous pores that possess various characteristics such as thermal insulation, fire resistance, and eco-friendliness, and are utilized in various fields including structures, transportation machinery, building materials, and energy absorption devices. As a prior patent related to the present invention, Korean Patent Registration No. 2063049, "Method for manufacturing metal foam," has been proposed. Conventional methods for manufacturing porous metal materials, such as Korean Patent Registration No. 2063049 "Method for manufacturing metal foam," involve preparing a metal slurry by mixing metal powder, a solvent, and a binder, then coating and drying the slurry to a specific thickness, and finally sintering it. Korean Patent Registration No. 2063049 "Method for manufacturing metal foam" uses alkyl cellulose, polyalkylene carbonate, or polyvinyl alcohol compounds as binders. However, in conventional methods for manufacturing porous metal materials, binders such as alkyl cellulose, polyalkylene carbonate, or polyvinyl alcohol compounds used are not completely removed during the sintering process in an inert atmosphere, so carbon residues remain on the surface of the porous metal material, making it difficult to manufacture high-purity porous metal materials. In addition, Korean Patent Registration No. 2063049 "Method for manufacturing metal foam" had the problem that the compatibility (dispersibility) within the slurry was low and the mixing ratio became complex due to the use of an anti-solvent in the slurry mixing process. FIG. 1 is a flowchart illustrating one embodiment of a method for manufacturing a high-purity porous metal material according to the present invention. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. However, the technical concept of the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided to ensure that the disclosed content is thorough and complete and to sufficiently convey the concept of the present invention to those skilled in the art. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. However, the technical concept of the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided to ensure that the disclosed content is thorough and complete and to sufficiently convey the concept of the present invention to those skilled in the art. FIG. 1 is a flowchart illustrating an embodiment of a method for manufacturing a high-purity porous metal material according to the present invention, and an embodiment of a method for manufacturing a high-purity porous metal material is described in detail below with reference to FIG. 1. One embodiment of the method for manufacturing a high-purity porous metal material according to the present invention includes a slurry manufacturing step (S100) for manufacturing a slurry for a porous metal material by mixing a metal component, a solvent, and a binder, and a sintering step (S300) for sintering the slurry manufactured in the slurry manufacturing step (S100). In addition, one embodiment of the method for manufacturing a porous metal material according to the present invention further includes a precursor molding step (S200) in which a slurry for a porous metal material prepared in a slurry manufacturing step (S100) is molded into a precursor before a sintering step (S300). The precursor molding step (S200) involves molding a slurry for a porous metal material into the shape of the porous metal material to be manufactured, and is exemplified by molding it into a film, sheet, or panel shape, but can also be molded into various other shapes of known porous metal materials. The slurry manufacturing step (S100) involves mixing a metal component, a solvent, and a binder to form a slurry for a porous metal material, using PVB (POLYVINYL BUTYRAL) as the binder. In addition, the slurry manufacturing step (S100) is exemplified by comprising 20% to 90% by weight of a metal component, 5% to 70% by weight of a solvent, and 3% to 10% by weight of a binder in 100% by weight of the total slurry for a porous