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High-temperature-resistant and graphene-oxidation-resistant nano-ceramic coating and preparation method thereof

A graphene oxidation and nano-ceramic technology, applied in coatings, fire-resistant coatings, etc., can solve the problems of insufficient thermal conductivity and infrared emissivity of anti-oxidation coatings, easy oxidation, loss of graphene material functions, etc., to avoid oxidation. , Improve the infrared emissivity, improve the effect of ceramic performance

Pending Publication Date: 2020-02-25
河南洛烯纳米材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Graphene has high thermal conductivity and high infrared radiation functions. Applying graphene to ceramic coatings can effectively improve the performance of ceramic coatings, such as high thermal conductivity and high infrared radiation functions. Oxidation, which will lose the function of graphene material application, such as the published publication number is CN105753425A, the Chinese invention patent titled "a graphene alumina-based far-infrared heating coating and its preparation method" discloses graphene Alumina-based far-infrared heating coating, but there is still a great lack of anti-oxidation, thermal conductivity and infrared emissivity of the coating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A high-temperature-resistant and anti-graphene oxidation nano-ceramic coating, the ceramic coating includes a two-layer structure, which are respectively an inner layer and an outer layer;

[0042] The inner layer is mainly composed of graphene, nano-alumina powder and nano-silicon oxide powder, and graphene, nano-alumina powder and nano-titanium oxide powder are combined through silica sol; the raw materials of the inner layer are proportioned as follows according to parts by weight: 10 parts of graphene, 25 parts of nano-alumina powder, 25 parts of nano-titanium oxide powder; 50 parts of silica sol.

[0043] The outer layer is a layer of transparent silicon dioxide protective film formed by ceramic resin at a high temperature of 400°C. The silicon dioxide protective film is high-purity silicon dioxide. Wherein, the ceramic resin is a mixture of ceramic powder and phenolic resin.

[0044] Wherein, the silicon dioxide protective film has a thickness of 4-6 μm, prefera...

Embodiment 2

[0053] A high-temperature-resistant and anti-graphene oxidation nano-ceramic coating, the ceramic coating includes a two-layer structure, which are respectively an inner layer and an outer layer;

[0054] The inner layer is mainly composed of graphene, nano-alumina powder and nano-silicon oxide powder, and graphene, nano-alumina powder and nano-titanium oxide powder are combined through silica sol; the raw materials of the inner layer are proportioned as follows according to parts by weight: 5 parts of graphene, 15 parts of nano-alumina powder, 15 parts of nano-titanium oxide powder; 40 parts of silica sol.

[0055] The outer layer is a transparent silicon dioxide protective film formed by ceramic resin at a high temperature of 300°C. The silicon dioxide protective film is high-purity silicon dioxide. Wherein, the ceramic resin is a mixture of ceramic powder and phenolic resin.

[0056] Wherein, the silicon dioxide protective film has a thickness of 4-6 μm, preferably 4 μm. ...

Embodiment 3

[0065] A high-temperature-resistant and anti-graphene oxidation nano-ceramic coating, the ceramic coating includes a two-layer structure, which are respectively an inner layer and an outer layer;

[0066] The inner layer is mainly composed of graphene, nano-alumina powder and nano-silicon oxide powder, and graphene, nano-alumina powder and nano-titanium oxide powder are combined through silica sol; the raw materials of the inner layer are proportioned as follows according to parts by weight: 8 parts of graphene, 20 parts of nano-alumina powder, 20 parts of nano-titanium oxide powder; 45 parts of silica sol.

[0067] The outer layer is a transparent silicon dioxide protective film formed by ceramic resin at a high temperature of 350°C. The silicon dioxide protective film is high-purity silicon dioxide. Among them, the ceramic resin is a mixture of ceramic powder and phenolic resin,

[0068] Wherein, the silicon dioxide protective film has a thickness of 4-6 μm, preferably 5 μ...

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Abstract

The invention discloses a high-temperature-resistant and graphene-oxidation-resistant nano-ceramic coating. The inner layer of the coating is mainly composed of graphene, nano-alumina powder and nanometer silicon oxide powder, and the graphene, the nano-alumina powder and nanometer silicon oxide powder are combined through silica sol; and the outer layer of the coating is a transparent silica protective film formed by ceramic resin at a high temperature. The inner layer is prepared from the graphene, the nano-alumina powder and the nanometer titanium oxide powder in proportion, so the performances of the ceramic can be improved by utilizing the high heat conduction and far infrared functions of the graphene. The outer layer structure is adopted, so graphene oxidation can be avoided, and the far infrared function of the inner layer is not disturbed. The ceramic coating can be applied to radiators with high temperature and medium-low temperature of 800 DEG C or below, has resistance to high temperature and has high thermal conductivity and the far-infrared function. The heat superconducting performance of graphene makes the heat conductivity of the coating after implementation reach50-80 W / M.k and the infrared emissivity reach 0.9 or above. The selected nano-alumina powder and nanometer silicon oxide powder are beneficial to improving the infrared emissivity of the coating.

Description

technical field [0001] The invention relates to the field of ceramic coatings, in particular to a high-temperature-resistant graphene oxidation-resistant nano-ceramic coating and a preparation method. Background technique [0002] High-performance ceramic coating technology is an edge science derived from the intersection of high-performance ceramic materials, advanced composite materials and modern surface engineering technology. Applications. High-performance ceramics refer to a new generation of ceramics that use refined high-purity, ultra-fine synthetic inorganic compounds as raw materials and are sintered by a precisely controlled preparation process. They have properties far superior to traditional ceramics, also known as advanced ceramics, fine ceramics, New ceramics or high-tech ceramics. [0003] Graphene has high thermal conductivity and high infrared radiation functions. Applying graphene to ceramic coatings can effectively improve the performance of ceramic coa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D7/61
CPCC09D1/00C09D5/18C09D7/61
Inventor 张伟吕崇瑜
Owner 河南洛烯纳米材料有限公司
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