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A kind of nano-powder based thermal insulation material and preparation method thereof

A nano-powder, heat-insulating material technology, applied in glass manufacturing equipment, ceramic products, manufacturing tools, etc., can solve the problems of poor mechanical strength of heat-insulating materials, high thermal conductivity, decreased heat-insulating performance, etc. The effect of improved slag removal, uniform material mixing and increased strength

Active Publication Date: 2022-04-01
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above-mentioned defects of poor mechanical strength of nano-silica powder-based thermal insulation materials, nano-silica thermal insulation materials with practical value developed abroad must adopt various processes to strengthen the matrix. Domestic related research is only by adding A large number of fibers or binders are used to increase its strength, but at the same time the strength is improved, the thermal insulation performance is reduced, especially the thermal conductivity at higher temperatures is significantly higher
Due to the relatively simple preparation process, some domestic manufacturers have also launched related products, but the types of products are small, the strength is low, and it is easy to drop powder and slag. There are still many problems in practical application. Similar products still have a big gap

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] This embodiment provides a method for preparing a nanopowder-based thermal insulation material, which includes the following steps:

[0042] 1) Surface treatment: use the first atomization method to bond 2 parts by weight of absolute ethanol to the surface of 80 parts by weight of nano-silica particles; specifically, spray absolute ethanol through the atomization nozzle (atomization The diameter of the nozzle is 0.1mm, the pressure is 0.1MPa), and the nano silicon oxide powder is stirred at the same time (the speed is 1000-2000 rpm, the time is 6-20 minutes, and the optimal speed is 1000 rpm, the time is 10 minutes ), so that absolute ethanol is in uniform contact with the surface of the particles to increase the silanol on the surface of the powder particles;

[0043] 2) Material mixing: Mix the particles obtained in step 1) with 2 parts by weight of quartz fiber, 8 parts by weight of titanium oxide and 8 parts by weight of absolute ethanol in a gravity-free mixing met...

Embodiment 2

[0050] This embodiment provides a method for preparing a nanoporous heat insulating material, comprising the following steps:

[0051] 1) Surface treatment: use the first atomization method to bond 7.5 parts by weight of absolute ethanol to the surface of 60 parts by weight of nano-silica particles; specifically, spray absolute ethanol through the atomization nozzle (atomization The diameter of the nozzle is 0.1mm, the pressure is 0.1MPa), and the nano silicon oxide powder is stirred at the same time (the speed is 1000-2000 rpm, the time is 6-20 minutes, and the optimal speed is 1000 rpm, the time is 10 minutes ), so that absolute ethanol is in uniform contact with the surface of the particles to increase the silanol on the surface of the powder particles;

[0052] 2) Material mixing: Mix the particles obtained in step 1) with 5 parts by weight of glass fiber, 20 parts by weight of titanium oxide and 7.5 parts by weight of absolute ethanol in a gravity-free mixing method, and ...

Embodiment 3

[0059] This embodiment provides a method for preparing a nanoporous heat insulating material, comprising the following steps:

[0060] 1) Surface treatment: use the first atomization method to bond 7.5 parts by weight of absolute ethanol to the surface of 60 parts by weight of nano-silica particles; specifically, spray absolute ethanol through the atomization nozzle (atomization The diameter of the nozzle is 0.1mm, the pressure is 0.1MPa), and the nano silicon oxide powder is stirred at the same time (the speed is 1000-2000 rpm, the time is 6-20 minutes, and the optimal speed is 1000 rpm, the time is 10 minutes ), so that absolute ethanol is in uniform contact with the particle surface;

[0061] 2) Mixing of materials: Mix the materials in step 1) with 5 parts by weight of glass fiber, 20 parts by weight of silicon carbide and 7.5 parts by weight of absolute ethanol in the non-gravity mixing method, and carry out the second mixing process at the same time Atomization (the dia...

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Abstract

The invention relates to a nano-powder-based thermal insulation material and a preparation method thereof. The method comprises the following steps: surface treatment; material mixing; hot pressing forming; drying; pressure impregnation; drying; heat treatment. In the present invention, by modifying the surface of the particles of the nano-silica-based thermal insulation material, the chemical connection between the particles is effectively increased, the strength of the material is greatly increased, the phenomenon of powder and slag dropping is significantly improved, and the actual application effect of the product is improved. greatly improved.

Description

technical field [0001] The invention belongs to the technical field of heat insulation and heat preservation materials, and in particular relates to a nanometer powder-based heat insulation material and a preparation method thereof. Background technique [0002] Nano-powder-based thermal insulation materials were developed after the mass production of nano-silica powder. It uses nano-silica powder as raw material, and various heat-insulating materials such as heat-insulating paper and heat-insulating board with nano-pore structure are obtained through a certain molding process. [0003] In view of the above-mentioned defects of poor mechanical strength of nano-silica powder-based thermal insulation materials, nano-silica thermal insulation materials with practical value developed abroad must adopt various processes to strengthen the matrix. Domestic related research is only by adding A large number of fibers or binders are used to increase its strength, but at the same time...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/80C04B35/82C04B35/14C04B38/00C03C14/00C03C3/076C03B19/06
CPCC04B35/82C04B35/14C04B38/0041C03C14/002C03C3/076C03B19/06C04B2235/3232C04B2235/602C04B2235/606C04B2235/616C04B2235/656C04B2235/6562C04B2235/6567C04B2235/96C04B2235/9607C03C2214/02C04B35/803
Inventor 张世超孙现凯陈玉峰胡利明王华孙浩然艾兵
Owner CHINA BUILDING MATERIALS ACAD