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
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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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