A kind of porous metal oxide particle and preparation method thereof

A technology of oxide particles and porous metals, applied in chemical instruments and methods, oxygen/ozone/oxides/hydroxides, non-metallic elements, etc., can solve the problem of difficult removal of templates, high production costs, and low production efficiency and other issues, to achieve good market prospects, low cost, and excellent performance

Active Publication Date: 2020-11-10
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shortcomings of this preparation method are complex process, low production efficiency, high production cost, difficult removal of the template and easy to cause environmental pollution
So far, there is no relevant record of using high-energy ball milling combined with pressing-sintering-oxidation treatment to prepare porous metal with partially oxidized surface

Method used

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  • A kind of porous metal oxide particle and preparation method thereof
  • A kind of porous metal oxide particle and preparation method thereof
  • A kind of porous metal oxide particle and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] In this example 1, commercially available short carbon fibers that have been degummed at 700°C for 60 minutes and electrolytic copper powder with a particle size of 120 μm are used as ball milling raw materials. The volume percentage of short carbon fibers is 10%, and the volume percentage of electrolytic copper powder is 90%. The diameter is 6 μm, and the length is 2 mm. The two are added to a ball mill for high-energy ball milling at a speed of 250 r / min, a ball milling time of 6 hours, and a ball-to-material ratio of 6:1. The copper powder embedded with carbon particles is annealed in the air to decarburize and oxidize. The annealing temperature is 300°C and the holding time is 20 minutes. Spectrum analysis see figure 2 and image 3 .

Embodiment 2

[0056] In Example 2, commercially available short carbon fibers that have been degummed at 750°C for 60 minutes and electrolytic nickel powder with a particle size of 120 μm are used as ball milling raw materials. The volume percentage of short carbon fibers is 25%, and the volume percentage of electrolytic nickel powder is 75%. The diameter is 6 μm, the length is 2 mm, and the two are added to a ball mill for high-energy ball milling at a speed of 280 r / min, a ball milling time of 7 hours, and a ball-to-material ratio of 6:1. The nickel powder embedded with carbon particles is annealed in the air to decarbonize and oxidize, the annealing temperature is 500° C., and the holding time is 30 minutes to obtain porous nickel oxide powder with a porosity of 20-25%.

Embodiment 3

[0058] In Example 3, commercially available short carbon fibers that have been degummed at 800°C for 60 minutes and reduced iron powder with a particle size of 150 μm are used as raw materials for ball milling. The volume percentage of short carbon fibers is 40%, and the volume percentage of reduced iron powder is 60%. The diameter is 6 μm, the length is 2 mm, and the two are added to a ball mill for high-energy ball milling at a speed of 300 r / min, a ball milling time of 8 hours, and a ball-to-material ratio of 6:1. Embedding carbon particles into iron powder is annealed in air to decarburize and oxidize. The annealing temperature is 500° C. and the holding time is 60 minutes to obtain porous iron oxide powder with a porosity of 30-38%.

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Abstract

The invention relates to a porous metal oxide particle and a preparation method thereof and belongs to the technical field of metal powder. The preparation method of the porous metal oxide particle comprises degumming short carbon fiber, performing an appropriate ball-milling process on the degummed short carbon fiber and metal powder to obtain ultrafine carbon particle embedded metal powder; performing annealing treatment in an oxidizing atmosphere to obtain surface oxidation controllable porous metal powder. The prepared porous metal oxide particle is high in oil storage, hydrogen storage, paraffin storage and lithium storage performance as well as catalytic performance; meanwhile, the preparation method of the porous metal oxide particle is simple in process and low in cost.

Description

technical field [0001] The invention relates to a porous metal oxide particle and a preparation method thereof, and belongs to the intersection field of metal powder technology and metal material surface treatment. Background technique [0002] Porous materials have the characteristics of low density, high porosity, large specific surface area, and selective gas permeability. Compared with dense metals, porous metals have good compressibility, and Poisson's ratio will change during deformation; Compared with polymer foam, it has high rigidity and high service temperature, and it will not be dissolved by organic solvents; compared with foam ceramics, it has good toughness, heat transfer performance and electrical conductivity. Because of its excellent performance, it is used as adsorption material, catalytic material, ion exchange material, and has broad prospects in the fields of automobile industry, aerospace, environmental protection, construction and so on. [0003] Poro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B13/32C01G3/02C01G53/04C01G49/02
CPCC01B13/322C01G3/02C01G49/02C01G53/04C01P2004/03C01P2006/16
Inventor 方华婵肖鹏朱佳敏刘滩
Owner CENT SOUTH UNIV
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