A method for preparing quasicrystalline porous materials by adding pore-forming agent

A technology of porous materials and pore-forming agents, applied in the field of preparation of high-porosity quasi-crystalline porous materials, can solve problems such as complex methods, harsh conditions, and unsuitability for mass production, and achieve simple process, low cost, and controllable preparation Effect

Active Publication Date: 2019-03-15
UNIV OF SCI & TECH BEIJING
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above method can prepare quasicrystals, the method itself is relatively complicated and the conditions are harsh, so it is not suitable for mass production.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for preparing quasicrystalline porous materials by adding pore-forming agent
  • A method for preparing quasicrystalline porous materials by adding pore-forming agent
  • A method for preparing quasicrystalline porous materials by adding pore-forming agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Use commercial Al powder, Cu powder, Fe powder, according to the alloy atomic ratio Al 63 Cu 25 Fe 12 Carry out alloy batching, and then mix with a mixer for 4-10h;

[0020] (2) In the homogeneously mixed Al, Cu, Fe element powders, add ammonium bicarbonate pore-forming agent, the pore-forming agent content accounts for 40wt% of the mass fraction of the mixed material, after mixing uniformly, it is formed into a cylindrical green body by cold pressing for subsequent use, Then put it in a high-temperature atmosphere sintering furnace and sinter at normal pressure under the protection of argon atmosphere; the sintering process is: rise from room temperature to 200-300°C at 5-10°C / min, keep it for 1-2h to remove moisture and pore-forming agent , then rise to 600-650°C at 3-5°C / min, hold for 1-2 hours to make Al react in solid phase, and finally rise to 700-900°C at 2-3°C / min, hold for 2-3 hours, and then The furnace was cooled to room temperature to obtain the quasi...

Embodiment 2

[0023] (1) Use commercial Al powder, Cu powder, Fe powder, according to the alloy atomic ratio Al 63 Cu 25 Fe 12 Carry out alloy batching, and then mix with a mixer for 4-10h;

[0024] (2) In the homogeneously mixed Al, Cu, Fe element powder, add ammonium bicarbonate pore forming agent, the content of ammonium bicarbonate pore forming agent accounts for 40wt% of the mass fraction of the mixed powder, and the particle size is -20+40 mesh, -40 +60 mesh, -60 mesh, after mixing evenly, it is cold-pressed and formed into a cylindrical green body for later use, and then placed in a high-temperature atmosphere sintering furnace and sintered under normal pressure under the protection of an argon atmosphere; the sintering process is: 5-10°C / min Raise from room temperature to 250°C, keep it warm for 1 hour to remove moisture and pore-forming agent, then raise it to 600°C at 3-5°C / min, keep it warm for 2 hours to make Al react in solid phase, and finally raise it at 2-3°C / min to 850°C...

Embodiment 3

[0027] (1) Use commercial Al powder, Cu powder, Fe powder, according to the alloy atomic ratio Al 63 Cu 25 Fe 12 Carry out alloy batching, and then mix with a mixer for 4-10h;

[0028] (2) In the homogeneously mixed Al, Cu, Fe element powder, add ammonium bicarbonate pore-forming agent, the content of ammonium bicarbonate pore-forming agent accounts for 10~40wt% of mixed powder mass fraction, particle size is-40+60 order, After mixing evenly, it is cold-pressed into a cylindrical green body for later use, and then placed in a high-temperature atmosphere sintering furnace and sintered under normal pressure under the protection of an argon atmosphere; Insulate for 1 hour to remove moisture and pore-forming agent, then heat up to 600°C at 3-5°C / min, hold for 2 hours to allow Al to react in solid phase, and finally rise to 850°C at 2-3°C / min, hold for 2 hours, and then Cool to room temperature with the furnace to obtain quasicrystalline porous materials;

[0029] (3) Figure ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for preparing a quasi-crystal porous material by adding a pore-forming agent, and belongs to the field of preparation of metal porous materials. According to the method, the pore-forming agent used is ammonium bicarbonate. The method comprises the steps that commercial Al powder, Cu powder and Fe powder are used, are proportioned according to the alloy atom ratio of Al63Cu25Fe12 and are uniformly mixed, the pore-forming agent, namely the ammonium bicarbonate is added according to the principle that the weight of the pore-forming agent accounts for 10-40% of the mixed material, and after the mixed powder and the pore-forming agent are uniformly mixed, the mixture is subjected to cold press molding and then is subjected to pressureless sintering in a high-temperature atmosphere sintering furnace under the protection of an argon atmosphere so as to prepare the high-porosity Al-Cu-Fe quasi-crystal porous material. The method has the advantages that the hole parameter of the prepared material is adjustable, the process is simple, the operation is convenient, the quasi-crystal porous material can be prepared in one step, and an effective way is provided for large-scale industrial preparation of the quasi-crystal porous material.

Description

technical field [0001] The invention belongs to the field of metal porous material preparation, and mainly relates to the preparation of a quasi-crystalline porous material with high porosity. technical background [0002] A quasicrystal is a solid phase with a long-range quasi-periodic translation order, and it has non-crystallographic rotational symmetry, such as: 5th, 8th, 10th, and 12th rotational symmetry axes. Due to its special structure characteristics and the existence of transition metal elements, the Al reference crystal has excellent performance, and new progress has been made in the research of surface modification, reinforcement composite material, hydrogen storage, catalysis, etc., while the quasicrystal The material as a catalyst is considered to be its most promising application. Increasing the specific surface area of ​​materials is one of the effective ways to improve catalytic efficiency. Therefore, preparing a quasicrystalline porous material with a ne...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C22C45/08C22C30/02C22C1/08B22F3/11
CPCB22F3/006B22F3/1134C22C30/02C22C45/08
Inventor 何战兵张蕃王磊磊
Owner UNIV OF SCI & TECH BEIJING
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap