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Nano-composite heat insulation plate and preparation method thereof

A nano-composite, thermal insulation board technology, applied in ceramic products, other household appliances, applications, etc., can solve the problems of large holes, high production costs, and high energy consumption.

Inactive Publication Date: 2020-01-07
LUYANG ENERGY SAVING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the insulation material needs to be calcined at 800-900°C for 0.5-1h, which consumes a lot of energy, and the production cost is high, and the selected matrix material is actually a micron material, and the pores formed by accumulation are relatively large.

Method used

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  • Nano-composite heat insulation plate and preparation method thereof

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preparation example Construction

[0029]The present invention also provides a method for preparing the above-mentioned nanocomposite heat insulation board, comprising: S1) combining silicon dioxide with a particle size of 20-30nm, silicon dioxide with a particle size of 400-600nm, expanded perlite, infrared shading mixing agent and inorganic refractory fiber to obtain a mixture; S2) spraying the inorganic adhesive into the mixture, continuing to stir after spraying, and pressing and molding to obtain a nanocomposite heat insulation board.

[0030] Among them, the present invention has no special limitation on the sources of all raw materials, which can be commercially available.

[0031] Mix and stir silicon dioxide with a particle size of 20-30nm, silicon dioxide with a particle size of 400-600nm, expanded perlite, an infrared light-shielding agent and an inorganic refractory fiber to obtain a mixture; the silicon dioxide, expanded perlite, The infrared light shielding agent and the inorganic refractory fiber...

Embodiment 1

[0038] Weigh 30 parts by weight of silicon dioxide powder with a particle size of 20-30nm, 40 parts by weight of silicon dioxide powder with a particle size of 400-600nm, 10 parts by weight of expanded perlite, 10 parts by weight of infrared light-shielding agent and 2 parts by weight of inorganic refractory fiber Add to the mixer, where the bulk density of expanded perlite is 60kg / m 3 , the infrared opacifying agent is silicon carbide with a particle size of 3 μm, and the inorganic refractory fiber is a ceramic fiber with a diameter of 4 μm and an average length of 15 mm. Turn on the mixer, the stirring speed is 400rpm, and the stirring time is 15min. After the materials are evenly stirred, stop stirring, and then spray 8 parts by weight of silica sol with a concentration of 30% into the mixer. After the spraying is completed, turn on the mixer with a stirring speed of 300 rpm and a stirring time of 5 minutes. After the stirring is completed, the materials are transported in...

Embodiment 2

[0040] Weigh 40 parts by weight of silicon dioxide powder with a particle size of 20-30nm, 30 parts by weight of silicon dioxide powder with a particle size of 400-600nm, 10 parts by weight of expanded perlite, 10 parts by weight of infrared light-shielding agent and 5 parts by weight of inorganic refractory fiber Add to the mixer, where the bulk density of expanded perlite is 70kg / m 3 , the infrared opacifying agent is titanium dioxide with a particle size of 4 μm, and the inorganic refractory fiber is an alkali-free glass fiber with a diameter of 7 μm and an average length of 8 mm. Turn on the mixer, the stirring speed is 500rpm, and the stirring time is 12min. After the materials are evenly stirred, stop stirring, and then spray 5 parts by weight of silica sol with a concentration of 40% into the mixer. After the spraying is completed, start the mixer with a stirring speed of 350 rpm and a stirring time of 4 minutes. After the stirring is completed, the materials are trans...

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Abstract

The invention provides a nano-composite heat insulation plate, which is prepared from the following raw materialsby weight: 30-40 parts of silicon dioxide with a particle size of 20-30nm, 30-40 partsof silicon dioxide with a particle size of 400-600 nm, 5-10 parts of expanded perlite, 5-10 parts of an infrared opacifying agent, 2-5 parts of inorganic refractory fibers, and 5-8 parts of an inorganic adhesive. Compared with the nano-composite heat insulation plate in the prior art, the nano-composite heat insulation plate of the invention has the following characteristics that the nano-composite heat insulation plate has good particle grading by introducing silicon dioxide with a particle size of 400-600nm and expanded perlite so as to achieve the uniform diameter distribution of the internal holes and effectively reduce the convective heat transfer, and the inorganic adhesive is introduced to ensure the normal temperature strength and the after-burning strength of the nano-composite heat insulation plate, so that the product is a pure inorganic product, free of smoke and odor at a high temperature, and low in cost.

Description

technical field [0001] The invention belongs to the technical field of heat insulation materials, and in particular relates to a nanocomposite heat insulation board and a preparation method thereof. Background technique [0002] With the gradual increase of national environmental protection and energy conservation and emission reduction, petrochemical, metallurgy, ceramic kilns, glass kilns and other industries are looking for lightweight insulation materials with better energy-saving effects and more environmental protection. At present, the traditional lightweight heat insulation materials include ceramic fiber products and calcium silicate products. In order to ensure the strength of the products, some organic binders are usually introduced in the production process. The presence of organic components leads to a large amount of smoke generated during use, which pollutes the environment. Moreover, the average 500°C thermal conductivity of these two lightweight insulation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/24C04B28/26C04B38/08C04B14/06C04B14/18
CPCC04B28/24C04B28/26C04B2201/20C04B2201/32C04B2201/50C04B14/062C04B14/185C04B14/324C04B20/008C04B14/46C04B14/305C04B14/42C04B14/022C04B14/38
Inventor 张成贺任大贵刘超岳耀辉刘焕英
Owner LUYANG ENERGY SAVING MATERIALS CO LTD
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