Porous nickel framework material and preparation method thereof

A framework material and porous nickel technology, which is applied in the field of preparation of metal functional materials, can solve the problems of low density and high specific strength, and achieve the effects of narrow pore size distribution, good density and high mechanical properties

Active Publication Date: 2018-08-17
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The second object of the present invention is to provide a method for preparing a porous nickel framework material, which can effectively solve the technical problems of preparing metallic nickel to form three-dimensional interconnected pores and having relatively low density, high specific strength and dense materials

Method used

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  • Porous nickel framework material and preparation method thereof
  • Porous nickel framework material and preparation method thereof
  • Porous nickel framework material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Step 1: Pretreatment of Porous Nickel Spherical Metal Powder

[0039] The porous nickel spherical metal powder used is ultrasonically cleaned and dried, and then sieved, and the powder with an average particle size ranging from 30 to 100 μm is sealed and stored for future use. The relevant performance and structural parameters of the porous nickel spherical metal powder prepared in this example are determined by the BET method as shown in Table 1. From Table 1, it can be seen that when the average particle size of the porous nickel spherical metal powder is 45-80 μm, the specific surface area is the largest and the pore diameter is the largest. Uniform distribution, better performance than porous nickel spherical metal powder with other particle sizes. figure 1 It is the scanning electron microscope (SEM) photo of the porous nickel spherical metal powder adopted in this example, figure 1 A is the surface topography of porous nickel spherical metal powder, figure 1 B i...

Embodiment 2

[0047] In this example, the average particle size sieved in Example 1 is 90 μm, and the average specific surface area is 44.308m 2 / g, porous nickel spherical metal powder with an average pore diameter of 30.12nm, ultrasonic cleaning and impurity removal and drying, weigh 45g of porous nickel spherical metal powder and place it in a graphite mold with a diameter of 30mm, adopt spark plasma sintering process, apply 11MPa The porous nickel spherical metal powder is pre-pressed by pressure, first heated to 300°C at a heating rate of 4°C / min, degassed for 0.8h, and then a pressure of 22MPa is applied to continue heating, and the heating rate is 105°C / min Heating to 700°C and keeping it warm for 8 minutes, and cooling to room temperature with the furnace after sintering, the porous nickel framework material can be obtained. Its microstructure is as Figure 5 As shown, after spark plasma sintering at a temperature of 700 °C, most of the porous nickel spherical metal powder has not ...

Embodiment 3

[0050] The average particle diameter sieved in Example 1 is 85 μm, and the average specific surface area is 44.308m 2 / g, porous nickel spherical metal powder with an average pore diameter of 30.12nm, ultrasonic cleaning and impurity removal and drying, weigh 45g of porous nickel spherical metal powder and place it in a graphite mold with a diameter of 30mm, adopt spark plasma sintering process, apply 13MPa The porous nickel spherical metal powder is pre-pressed under pressure, firstly heated to 300°C at a heating rate of 5°C / min, degassed for 0.9h, and then the pressure of 24MPa is applied to continue heating, and the heating rate is 110°C / min Heating to 750°C and keeping it warm for 10 minutes, and cooling to room temperature with the furnace after sintering, the porous nickel framework material can be obtained. Its microstructure is as Figure 7 As shown, the porous nickel spherical metal powder is still inside the material after spark plasma sintering at a temperature of ...

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Abstract

The invention discloses a porous nickel framework material and a preparation method thereof. The porous nickel framework material has three-dimensional communication holes, has material density being5.32-9.76g / cm<3>, microhardness being 120-539.8HV, room-temperature compressive strength being 186-930 MPa and porosity being 30-83%. The preparation method comprises the following steps of: A, performing screening, impurity-removal and drying on prepared spherical metal nickel powder, and sealing for storage; and B, adopting a sintering process to sinter and form the spherical metal nickel powerobtained in the step A, thereby obtaining the porous nickel framework block material. The porous nickel framework material is high in strength, is uniform in three-dimensional hole distribution, and is good in compactness; and the preparation method is simple and reliable in process, is free of harmful gas in process, and does not cause environmental pollution. Meanwhile, the front engineering material with advantages in function and structure can be applied to the fields such as industrial wastewater treatment, filtration and separation, automobile tail gas treatment, catalyst carriers, energy storage and chemical engineering.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and in particular relates to a method for preparing metal functional materials. Background technique [0002] Porous materials are materials that form a network structure by interpenetrating or closing pores, the boundaries or surfaces of which are composed of pillars or plates. Compared with continuum materials, porous materials usually have the advantages of low relative density, high specific strength, light weight, large specific surface area, good heat insulation, sound insulation and permeability. Porous materials with three-dimensional interconnected voids are special functional materials that are different from dense materials. Due to their special pore structure, they have applications that are difficult for dense materials and play special functions. Due to the pores distributed in a certain pore size range, large specific surface area, adsorption capacity and many special pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F3/11
CPCB22F3/11B22F2998/10B22F1/05B22F1/14B22F2003/1051B22F3/1021B22F3/02
Inventor 徐轶兰伟陈亚
Owner SOUTHWEST JIAOTONG UNIV
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