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Graphene oxide coated ceramic particle corrosion-resistant gradient coating and preparation method thereof

A graphene-coated, ceramic particle technology, applied in coating, metal material coating process, heating inorganic powder coating and other directions, can solve the problem of reducing the corrosion resistance of the coating, increasing the porosity of the coating instead of decreasing, oxidation Problems such as low graphene dispersibility, to achieve the effect of improving bonding strength, avoiding decomposition, and improving antioxidant performance

Pending Publication Date: 2022-05-13
ZHAOSHAN TECH BEIJING CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the dispersibility of graphene oxide in the coating is low, and it is prone to cluster phenomenon, so the expected effect cannot be obtained.
In addition, due to the smooth surface and chemical stability of graphene oxide, when graphene oxide is implanted into ceramic coatings, the combination of graphene oxide and coating matrix is ​​not firm enough, and gaps are likely to occur at the interface, causing the porosity of the coating to increase rather than decrease. , reducing the corrosion resistance of the coating

Method used

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  • Graphene oxide coated ceramic particle corrosion-resistant gradient coating and preparation method thereof
  • Graphene oxide coated ceramic particle corrosion-resistant gradient coating and preparation method thereof

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preparation example Construction

[0028] The invention provides a method for preparing a graphene oxide-coated ceramic particle corrosion-resistant gradient coating, the steps of which are as follows:

[0029] (1) Preparation of graphene oxide-coated ceramic particles

[0030] S1. Take 10wt% ethanol solution, add a small amount of dispersant, stir evenly, add nano-graphene oxide powder, gradually heat up to 50°C-90°C under stirring condition, and add dispersant dropwise under stirring, and stir to react After 1h-2h, obtain the dispersion slurry of graphene oxide;

[0031] S2, according to Cr3C2 ceramic powder and graphene oxide powder mass ratio is (1~4): 1 ratio, in above-mentioned dispersion slurry of graphene oxide, add Cr3C2 ceramic powder and grinding ball, and join in the ball mill, at 70- Grinding for 6-18 hours at a ball milling speed of 160 rpm, then taking out and separating the slurry obtained by grinding, drying and classifying to obtain graphene oxide-coated ceramic particles;

[0032] (2) Prepa...

Embodiment 1

[0043] (1) Preparation of graphene oxide-coated ceramic particles

[0044]S1. Take 100mL of 10wt% ethanol solution, add 0.4g dispersant 3-aminopropyltriethoxysilane, stir evenly, add 8g nano-graphene oxide powder, and gradually heat up to 85°C under stirring conditions, And continue to drop 0.6g dispersant under stirring, after stirring and reacting for 2h, the dispersion slurry of graphene oxide is obtained;

[0045] S2. Add 16g of Cr3C2 ceramic powder and grinding balls to the above-mentioned graphene oxide dispersion slurry, and add them to the ball mill, and grind for 12 hours at 100 rpm ball milling speed, then take out the slurry obtained by grinding and separate, after drying Drying and grading treatment to obtain graphene oxide-coated ceramic particles;

[0046] The particle size of the Cr3C2 ceramic powder is 4-10 μm, and the particle size of the graphene oxide is 0.5-3 μm;

[0047] (2) Preparation of graphene oxide-coated ceramic particles

[0048] S1. Add 0.5g of...

Embodiment 2

[0054] (1) Preparation of graphene oxide-coated ceramic particles

[0055] S1. Take 100mL of 10wt% ethanol solution, add 0.3g dispersant tetraethyl orthosilicate, stir evenly, add 5g nano-graphene oxide powder, gradually heat up to 85°C under stirring condition, and continue stirring 0.4g dispersant was added dropwise, and after stirring and reacting for 2h, a dispersion slurry of graphene oxide was obtained;

[0056] S2. Add 15g of Cr3C2 ceramic powder and grinding balls to the above-mentioned graphene oxide dispersion slurry, and add them to a ball mill, grind for 12 hours at a ball mill speed of 100 rpm, then take out and separate the slurry obtained by grinding, and bake Drying and grading treatment to obtain graphene oxide-coated ceramic particles;

[0057] The particle size of the Cr3C2 ceramic powder is 4-10 μm, and the particle size of the graphene oxide is 0.5-3 μm;

[0058] (2) Preparation of graphene oxide-coated ceramic particles

[0059] S1. Add 0.5g of 3-amino...

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Abstract

The invention discloses a preparation method of a graphene oxide coated ceramic particle corrosion-resistant gradient coating. The preparation method comprises the following steps: preparing graphene oxide coated Cr3C2 ceramic particles, carrying out dispersion reaction on the graphene oxide coated Cr3C2 ceramic particles and metal oxide powder to generate a hybrid reactant, finally mixing the hybrid reactant with ceramic aggregate and an adhesive, and curing and sintering to prepare the corrosion-resistant ceramic coating. The core-shell structure of the ceramic particles and the graphene oxide is favorable for improving the bonding strength of the graphene oxide and a ceramic matrix, avoiding gaps on an interface, improving the compactness of the coating, reducing the generation of cracks of the coating and improving the high-temperature corrosion resistance of the coating; and meanwhile, the core-shell structure is beneficial to improving the oxidation resistance of the coating and prolonging the service life of the coating.

Description

technical field [0001] The invention relates to the technical field of ceramic coatings, in particular to a graphene oxide-coated ceramic particle corrosion-resistant gradient coating and a preparation method thereof. Background technique [0002] Waste incineration power generation has the advantages of reduction, harmlessness, and resource utilization. It is recognized as the best way to dispose of waste. It has small footprint, easy site selection, short processing time, significant reduction, thorough harmlessness, and recyclability. Waste incineration waste heat and other advantages are the waste disposal methods that our country is vigorously promoting. However, the types of garbage are complex, and the flue gas formed by incineration contains a large amount of corrosive gases (such as: SO 2 , SO 3 , Cl 2 etc.), causing serious corrosion to the interior of the incineration boiler, resulting in frequent shutdowns for maintenance, resulting in significant economic los...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/01C04B35/46C04B35/628C23C24/08C04B35/622
CPCC04B35/10C04B35/01C04B35/46C23C24/082C04B35/62839C04B35/62886C04B35/62222C04B2235/3839C04B2235/483C04B2235/425C04B2235/3826C04B2235/3873C04B2235/3821C04B2235/3418C04B2235/9684
Inventor 邰召山
Owner ZHAOSHAN TECH BEIJING CO LTD
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