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Method for preparing foamed ceramic material using foamed silica gel and inorganic powder composite as precursor

A technology of inorganic powder and foamed silica gel, which is applied in the production of ceramic materials, ceramic products, and other household appliances. It can solve problems such as collapse, poor body strength, and pulverization, so as to improve firing collapse and not easily broken. , good plastic effect

Active Publication Date: 2022-07-12
SHANGHAI LEVSON ENTERPRISE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to improve the problems existing in the existing methods of preparing foam ceramics, such as: some methods have many preparation processes; some methods need to use a large amount of organic solvents; The shrinkage rate of the product prepared by this method is large, and it is prone to collapse and pulverization; the mechanical strength of the product prepared by some methods is seriously insufficient, and the product cannot be applied, etc.

Method used

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  • Method for preparing foamed ceramic material using foamed silica gel and inorganic powder composite as precursor
  • Method for preparing foamed ceramic material using foamed silica gel and inorganic powder composite as precursor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Compounding and surface treatment of inorganic powder materials;

[0039] Select 4 kinds of spherical α-Al with average particle size 2 O 3 Powder, mix according to the requirements of porosity range of 10%-30% after mixing; disperse silane coupling agent without P, ​​N, S elements in 95% ethanol solution, and then mix the mixed spherical α-Al 2 O 3 The powder material is placed in the solution, spherical α-Al 2 O 3 The mass ratio of powder material to coupling agent mass is 1000:10, and the slurry is treated with high-speed stirring at a speed of 2000r / min for 2hrs, and then the slurry is dried by spray drying process, and the drying temperature is controlled at 80-120℃. In the spray drying process, the 95% ethanol solution is condensed and liquefied and then collected and reused.

[0040] (2) Uniform dispersion and mixing of liquid foamed silica gel and inorganic powder materials that have been compounded and surface-treated;

[0041] Select the foaming rati...

Embodiment 2

[0050] (1) Compounding and surface treatment of inorganic powder materials;

[0051] Select 4 kinds of spherical α-Al with average particle size 2 O 3 Powder, mix according to the requirements of porosity range of 10%-30% after mixing; disperse silane coupling agent without P, ​​N, S elements in 95% ethanol solution, and then mix the mixed spherical α-Al 2 O 3 The powder material is placed in the solution, spherical α-Al 2 O 3 The mass ratio of powder material to coupling agent mass is 1000:5, and the slurry is treated with high-speed stirring at a speed of 2000r / min for 2hrs, and then the slurry is dried by spray drying process, and the drying temperature is controlled at 80-120℃. In the spray drying process, the 95% ethanol solution is condensed and liquefied and then collected and reused.

[0052] (2) Uniform dispersion and mixing of liquid foamed silica gel and inorganic powder materials that have been compounded and surface-treated;

[0053] Select the foaming ratio...

Embodiment 3

[0061] (1) Compounding and surface treatment of inorganic powder materials;

[0062] Select 4 kinds of spherical α-Al with average particle size 2 O 3 Powder, mix according to the requirements of porosity range of 10%-30% after mixing; disperse silane coupling agent without P, ​​N, S elements in 95% ethanol solution, and then mix the mixed spherical α-Al 2 O 3 The powder material is placed in the solution, spherical α-Al 2 O 3 The mass ratio of powder material to coupling agent mass is 1000:1, and the slurry is treated with high-speed stirring at a speed of 2000r / min for 2hrs, and then the slurry is dried by spray drying process, and the drying temperature is controlled at 80-120℃. In the spray drying process, the 95% ethanol solution is condensed and liquefied and then collected and reused.

[0063] (2) Uniform dispersion and mixing of liquid foamed silica gel and inorganic powder materials that have been compounded and surface-treated;

[0064] Select the foaming ratio...

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Abstract

The invention provides a method for preparing a foamed ceramic material by using a foamed silica gel-inorganic powder composite as a precursor. The foaming principle of foamed silica gel is used to create pores to prepare a porous precursor body of the foamed ceramic material. The foamed ceramic material is obtained by low temperature cracking and high temperature ceramic sintering. The invention belongs to the field of inorganic functional ceramic composite materials. It is uniformly dispersed and mixed with the mixed and surface-treated inorganic powder material; (3) the foamed vulcanization molding of the mixed foamed silica gel-inorganic powder material compound; (4) the porous precursor formed by the foamed vulcanization molding (5) High-temperature ceramic sintering of the product completed by low-temperature cracking under high-temperature conditions; finally, a porous foam ceramic material with high porosity, uniform pore size distribution and excellent mechanical properties is obtained.

Description

technical field [0001] The invention belongs to the field of preparation of inorganic functional ceramic composite materials, and in particular relates to a method for preparing foamed ceramic materials by using a foamed silica gel-inorganic powder composite as a precursor. Background technique [0002] Foam ceramic is a porous ceramic body with high porosity with a three-dimensional space grid structure. Its shape is like a tempered foam plastic or a porcelain sponge foam. High temperature, chemical corrosion resistance, good mechanical strength and filtration and adsorption performance, can be widely used in heat exchange materials, gas distribution materials, automobile exhaust devices, purification of metallurgical industry, filtration of molten metal, heat energy recovery, light industrial spraying industry, industrial sewage treatment , heat and sound insulation materials, also used as chemical catalyst carrier, electrolytic diaphragm and separation and dispersion elem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/00C04B38/06C04B35/583C04B35/58C04B35/565C04B35/505C04B35/48C04B35/14C04B35/10
CPCC04B38/00C04B38/0022C04B38/067C04B35/10C04B35/583C04B35/565C04B35/48C04B35/58078C04B35/14C04B35/505Y02P40/60
Inventor 贺祖章张燕萍赵志国
Owner SHANGHAI LEVSON ENTERPRISE GRP
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