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Porous material based on in-situ foamed AlON-AlN and preparation method thereof

A porous material, in-situ foaming technology, used in ceramic products, other household appliances, applications, etc., can solve the problem of weak material binding force, improve oxidation resistance, thermodynamic performance, and good thermal stability. , the effect of close integration

Active Publication Date: 2018-12-11
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The AlN raw material used is very easy to hydrate during mechanical mixing, and the material obtained by mechanical mixing is not strong.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] An AlON-AlN porous material based on in-situ foaming and a preparation method thereof. The steps of the preparation method described in this embodiment are:

[0026] Step 1, the Al of 100 mass parts 4 o 4 C powder is mixed with 20-22 parts by mass of deionized water and stirred evenly to obtain Al 4 o 4 C slurry.

[0027] Step 2: Mix 2-3 parts by mass of foaming agent with deionized water 10-10.4 times of the foaming agent, and stir for 3-5 minutes to prepare foam.

[0028] Step 3, to the Al 4 o 4 Add the foam into the C slurry, stir while adding, continue to stir for 1-5 minutes after all the foam is added, pour it into a mold, let it stand in a natural state for 1-1.4 hours, and dry it at 60-64°C. Demoulding, get Al 4 o 4 C embryo body.

[0029] Step 4, the Al 4 o 4 The green body of C is placed in an atmosphere furnace, kept in a nitrogen atmosphere at 1500-1600° C. for 1-5 hours, and naturally cooled to room temperature to obtain a porous material based ...

Embodiment 2

[0032] An AlON-AlN porous material based on in-situ foaming and a preparation method thereof. The steps of the preparation method described in this embodiment are:

[0033] Step 1, the Al of 100 mass parts 4 o 4 Mix C powder with 22 to 24 parts by mass of deionized water and stir evenly to obtain Al 4 o 4 C slurry.

[0034] Step 2: Mix 2.5-3.5 parts by mass of foaming agent with 10.4-10.8 times the amount of deionized water of the foaming agent, and stir for 3-5 minutes to prepare foam.

[0035] Step 3, to the Al 4 o 4 Add the foam into the C slurry, stir while adding, continue to stir for 1-5 minutes after all the foam is added, pour it into a mold, let it stand in a natural state for 1.4-1.8 hours, and dry it at 64-68°C. demoulding, get Al 4 o 4 C embryo body.

[0036] Step 4, the Al4 o 4 The green body of C is placed in an atmosphere furnace, kept in a nitrogen atmosphere at 1600-1700° C. for 1-5 hours, and naturally cooled to room temperature to obtain a porous ...

Embodiment 3

[0039] An AlON-AlN porous material based on in-situ foaming and a preparation method thereof. The steps of the preparation method described in this embodiment are:

[0040] Step 1, the Al of 100 mass parts 4 o 4 Mix C powder with 24 to 26 parts by mass of deionized water and stir evenly to obtain Al 4 o 4 C slurry.

[0041] Step 2: Mix 3-4 mass parts of foaming agent with deionized water 10.8-11.2 times of the foaming agent, and stir for 3-5 minutes to prepare foam.

[0042] Step 3, to the Al 4 o 4 Add the foam into the C slurry, stir while adding, continue stirring for 1-5 minutes after all the foam is added, pour it into a mold, let it stand in a natural state for 1.8-2.2 hours, and dry it at 68-72°C. Demoulding, get Al 4 o 4 C embryo body.

[0043] Step 4, the Al 4 o 4 The green body C is placed in an atmosphere furnace, kept in a nitrogen atmosphere at 1700-1800° C. for 1-5 hours, and naturally cooled to room temperature to obtain a porous material based on in-...

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Abstract

The invention relates to a porous material based on in-situ foamed AlON-AlN and a preparation method thereof. The preparation method is characterized by mixing uniformly 100 parts of Al4O4C powder bymass and 20 to 30 parts of deionized water by mass to obtain an Al4O4C slurry; mixing and stirring 2 to 5 parts of a foaming agent by mass and deionized water which is 10 to 12 times of the foaming agent to obtain a foam; adding the foam into the Al4O4C slurry, stirring well while adding the foam, pouring into a mold, standing under natural conditions, drying at 60 to 80 DEG C, and demolding to achieve an Al4O4C blank; placing the Al4O4C blank in an atmosphere furnace, performing heat preservation on the blank at 1500 to 2000 DEG C for 1 to 5 hours in a nitrogen atmosphere, and naturally cooling to obtain a porous material based on in-situ foamed AlON-AlN. The preparation method disclosed by the invention has the advantages of low preparation temperature, simple process and low cost, and the prepared porous material based on in-situ foamed AlON-AlN has a strong bonding force, a good thermal stability and a light weight.

Description

technical field [0001] The invention belongs to the preparation method of porous material. In particular, it relates to an AlON-AlN porous material based on in-situ foaming and a preparation method thereof. Background technique [0002] AlON material has good slag erosion resistance and slag penetration resistance, high temperature resistance, thermal shock resistance, corrosion resistance and other properties, and has good light transmission and excellent dielectric properties. It is used for transparent armor, infrared window cover , Missile windows and hood materials and other fields of ideal materials. AlN materials have high thermal conductivity, good electrical insulation, high strength and hardness, corrosion resistance, wear resistance and low thermal expansion coefficient, and are widely used in semiconductor materials, microwave electronic attenuation materials and refractory materials. Considering that composite materials are an effective way to improve the perf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/10C04B35/582C04B35/64C04B35/622
CPCC04B35/581C04B35/622C04B35/64C04B38/106C04B2235/6586
Inventor 余超郑永翔丁军邓承继祝洪喜
Owner WUHAN UNIV OF SCI & TECH
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