Aqueous boron nitride coating capable of binding at low temperature and being used at high temperature
A technology of boron nitride and hexagonal boron nitride, which is applied in the direction of coating, etc., can solve the problems of limiting the application range of boron nitride coatings, cumbersome preparation steps, high bonding temperature, etc., and achieve low bonding temperature and long service life , the effect of firm adhesion
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Embodiment 1
[0020] The water-based boron nitride coating that can be bonded at low temperature and used at high temperature in this embodiment is made of the following raw materials in weight ratio: 15% hexagonal boron nitride, 2% composite high-temperature binder, 1% carboxymethyl cellulose, Attapulgite 0.5%, cobalt aluminate 0.5%, isooctyl alcohol 0.5%, and the balance is demineralized water; the composite high-temperature binder is a mixture of silica sol and aluminum sol at a mass ratio of 1:3; hexagonal boron nitride It is made by mixing hexagonal boron nitride with a particle size of 10.0 μm to 30.0 μm and hexagonal boron nitride with a particle size of 0.5 μm to 3 μm at a mass ratio of 1:0.05.
[0021] The preparation method of the water-based boron nitride coating that can be bonded at low temperature and used at high temperature of the present embodiment is as follows:
[0022] At room temperature, first mix and stir the composite high-temperature binder, sodium carboxymethyl cel...
Embodiment 2
[0024] The water-based boron nitride coating that can be bonded at low temperature and used at high temperature in this embodiment is made of the following raw materials in weight ratio: 25% hexagonal boron nitride, 5% composite high-temperature binder, 1% carboxymethyl cellulose, 0.5% bentonite, 0.5% cobalt aluminate, 0.5% isooctyl alcohol, and the balance is demineralized water; the composite high-temperature binder is a mixture of silica sol and aluminum dihydrogen phosphate at a mass ratio of 1:5; hexagonal boron nitride It is made by mixing hexagonal boron nitride with a particle size of 10.0 μm to 30.0 μm and hexagonal boron nitride with a particle size of 0.5 μm to 3 μm at a mass ratio of 1:0.3.
[0025] The preparation method of the water-based boron nitride coating that can be bonded at low temperature and used at high temperature in this embodiment is the same as that in Embodiment 1.
Embodiment 3
[0027] The water-based boron nitride coating that can be bonded at low temperature and used at high temperature in this embodiment is made of the following raw materials in weight ratio: 30% hexagonal boron nitride, 8% composite high-temperature binder, 1% carboxymethyl cellulose, 0.5% sepiolite powder, 0.5% cobalt aluminate, 0.5% isooctanol, and the balance is demineralized water; the composite high-temperature binder is a mixture of silica sol and aluminum hydroxide at a mass ratio of 1:10; hexagonal nitriding Boron is a mixture of hexagonal boron nitride with a particle size of 10.0 μm to 30.0 μm and hexagonal boron nitride with a particle size of 0.5 μm to 3 μm at a mass ratio of 1:0.5.
[0028] The preparation method of the water-based boron nitride coating that can be bonded at low temperature and used at high temperature in this embodiment is the same as that in Embodiment 1.
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