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Silicon-containing high-temperature-resistant insulating coating and preparation method and application thereof

A technology for insulating coatings and high temperature resistance, applied in the direction of anti-corrosion coatings, coatings, etc., to achieve strong adhesion, excellent corrosion resistance, and good surface smoothness

Inactive Publication Date: 2019-06-18
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, existing inorganic coatings still have deficiencies in one or more performances such as adhesion, corrosion resistance, corrosion, heat resistance, shock resistance, weather resistance, foaming, stability, etc.

Method used

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  • Silicon-containing high-temperature-resistant insulating coating and preparation method and application thereof
  • Silicon-containing high-temperature-resistant insulating coating and preparation method and application thereof
  • Silicon-containing high-temperature-resistant insulating coating and preparation method and application thereof

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preparation example Construction

[0032] (1) Preparation of phosphate solution: phosphoric acid solution and metal hydroxide are placed in a reaction vessel and mixed and heated to a boiling state for reaction until the reaction system becomes transparent and the transparency no longer increases; then, the reaction system is cooled to room temperature, and aging at room temperature for more than 12 hours, preferably aging for 12 hours to 36 hours, to obtain a phosphate solution;

[0033] (2) Preparation of silicon-containing high-temperature insulating coating: add phosphate solution, silicon oxide, aluminum oxide, zinc oxide, silica sol, diluent and optional boric acid to the phosphate solution, and pass through the ball milling method after stirring evenly The mixture is mixed for more than 2 hours, and ball milled for 2 hours to 8 hours, so as to obtain the silicon-containing high temperature resistant insulating coating.

Embodiment 1

[0036] Embodiment 1: Preparation of aluminum phosphate salt solution

[0037] Weigh 230g of 85% concentration phosphoric acid, Al(OH) 3 50g of the powder was placed in a reaction vessel and stirred evenly. Stir the reaction and heat up to boiling state, stop heating after the reaction system is transparent. The reaction system was cooled to room temperature and aged for 12 hours.

Embodiment 2

[0038] Embodiment 2: preparation magnesium phosphate salt and aluminum phosphate salt solution

[0039] Weigh 290g of 85% concentrated phosphoric acid, Al(OH) 3 Powder 50g, Mg(OH) 2 15g of powder, placed in a reaction vessel and stirred evenly. Stir the reaction and heat up to boiling state, stop heating after the reaction system is transparent. The reaction system was cooled to room temperature and aged for 16 hours.

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Abstract

The invention relates to a silicon-containing high-temperature-resistant insulating coating and a preparation method thereof. The silicon-containing high-temperature-resistant insulating coating comprises or consists of the following components: a phosphate solution, silicon oxide, aluminium oxide, zinc oxide, silica sol, a diluent and optional boric acid. The method comprises the following steps:preparing the phosphate solution heating a phosphoric acid solution and metal hydroxide to a boiling state, maintaining till a reaction system becomes transparent, and then cooling to room temperature, and ageing for 12 hours or longer; and preparing the silicon-containing high-temperature-resistant insulating coating: adding the phosphate solution, the silicon oxide, the aluminium oxide, the zinc oxide, the silica sol, the diluent and the optional boric acid, uniformly stirring and then performing ball-milling to obtain the silicon-containing high-temperature-resistant insulating coating. The invention further provides application of the coating in preparation of a high-temperature-resistant and / or insulating coating layer. The coating disclosed by the invention has excellent propertiesof high-temperature resistance, insulativity, adhesiveness and the like.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a silicon-containing high-temperature insulating coating and a preparation method and application thereof. Background technique [0002] With the rapid development of industries such as aviation, aerospace, automobiles and weapons, the requirements for material protection are getting higher and higher. Some components need to work in high temperature and corrosive environments, and at the same time have physical properties such as fatigue resistance and thermal shock resistance. and insulation and other functional properties. Insulating coatings have excellent electrical insulation properties and are widely used in the field of electrical performance components. Organic insulating coatings are prone to aging and do not have flame retardant function. The inorganic coating has the characteristics of high temperature resistance, corrosion resistance, and no mildew, which can protect the su...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D5/25C09D5/08
Inventor 王华栋董衡吴焘张剑王涛
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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