Preparation method of heat insulating and flame retardant silicon nitride ceramic coating material and coating

A technology of silicon nitride ceramics and coating materials, applied in the direction of coatings, fireproof coatings, etc., can solve the problems of high sintering temperature of silicon nitride ceramics and limit the application of heat insulation fields, and achieve good flame retardant and heat insulation performance, suitable for The effect of large-scale industrial production and simple process

Inactive Publication Date: 2017-10-13
上海极率科技有限公司
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the sintering temperature of silicon nitride ceramics is usually very high, which limits its application in the field of heat insulation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This embodiment provides a method for preparing a heat-insulating and flame-retardant silicon nitride ceramic coating, which specifically includes the following steps:

[0028] Put the silicon nitride powder into a high-speed stirring mill, use absolute ethanol as the grinding medium, add polyacrylamide as a dispersant, and grind at a speed of 500rpm until the powder particle size is d 50 =150nm, the weight ratio of silicon nitride powder and absolute ethanol is controlled to be 1:1.5, and the consumption of polyacrylamide is 1% of the weight of silicon nitride powder;

[0029] Adding butadiene and glycerin to obtain a resin slurry containing silicon nitride powder, controlling the amount of butadiene to be 20% of the volume of the silicon nitride powder, and the amount of silicone oil to be 10% of the weight of the silicon nitride powder;

[0030] The resin slurry containing the silicon nitride powder is coated on the carbon fiber plate, and the resin coating containin...

Embodiment 2

[0033] This embodiment provides a method for preparing a heat-insulating and flame-retardant silicon nitride ceramic coating, which specifically includes the following steps:

[0034] Put the silicon nitride powder into a high-speed stirring mill, use absolute ethanol as the grinding medium, add the dispersant polyacrylamide, and grind it at a speed of 400rpm until the powder particle size is d 50 =100nm, the weight ratio of silicon nitride powder and absolute ethanol is controlled to be 1:2, and the consumption of polyacrylamide is 5% of the weight of silicon nitride powder;

[0035] Add butadiene, acrylonitrile and silicone oil to obtain a resin slurry containing silicon nitride powder, control the total amount of butadiene and acrylonitrile to be 30% of the volume of the silicon nitride powder, and the amount of silicone oil to be 30% of the silicon nitride powder 5% of powder weight;

[0036] The resin slurry containing the silicon nitride powder is coated on the carbon f...

Embodiment 3

[0039] This embodiment provides a method for preparing a heat-insulating and flame-retardant silicon nitride ceramic coating, which specifically includes the following steps:

[0040] Put the silicon nitride powder into a high-speed stirring mill, use absolute ethanol as the grinding medium, add the dispersant polyacrylamide, and grind it at a speed of 1000rpm to the powder particle size d 50 =200nm, the weight ratio of silicon nitride powder and absolute ethanol is controlled to be 1:15, and the consumption of polyacrylamide is 3% of the weight of silicon nitride powder;

[0041] Add butadiene, styrene, butadiene and silicone oil to obtain a resin slurry containing silicon nitride powder, and control the total amount of butadiene, styrene and butadiene to be 20% of the volume of the silicon nitride powder , the amount of silicone oil is 15% of the weight of silicon nitride powder;

[0042] The resin slurry containing the silicon nitride powder is coated on the carbon fiber p...

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Abstract

The invention provides a preparation method of a heat insulating and flame retardant silicon nitride ceramic coating material and a coating, the preparation method comprises the following steps: grinding a silicon nitride powder till the particle size is 100-200 nm; and adding a resin, silicone oil and the like to obtain resin slurry containing the silicon nitride powder, namely the heat insulating and flame retardant silicon nitride ceramic coating material. The preparation method has the following beneficial effects that: 1, the difficult problem of high sintering temperature of a silicon nitride ceramic is ingeniously solved, the concept is that the surface of a carbon fiber plate is coated with a porous silicon nitride ceramic coating, and the porous silicon nitride ceramic coating with a heat insulating property is finally formed along with the controllable volatilization of an organic matter in the coating under the working conditions, so that the heating insulating and the flame retarding of the carbon fiber plate are realized, and therefore, the heat insulating and flame retardant coating with excellent heat insulating and flame retardant properties is successfully prepared; and 2, the method is simple in process, is environmentally friendly, and is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a preparation method of a heat-insulating and flame-retardant silicon nitride ceramic coating material and the coating thereof, belonging to the technical field of heat-insulating and flame-retardant materials. Background technique [0002] At present, carbon fiber is more and more used in aircraft, automobiles and other vehicles. The biggest feature of carbon fiber is light weight and high strength. With the same volume of steel, carbon fiber is more than half lighter than it, but its strength is more than four times its strength. The function of reducing load is obvious. In an environment without oxygen, its operating temperature can reach At 2000°C, the strength can reach 110-300kg per square millimeter at 500°C. When the temperature reaches 1600°C, its tensile strength not only does not decrease but increases. At 180-600kg per square millimeter, carbon fiber has a good Flame retardant effect, if the temperature is very hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D5/18C09D7/12
CPCC09D1/00C09D5/18
Inventor 冯涛齐荟仟孙宇苑玲
Owner 上海极率科技有限公司
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