Corrosion-resistance coating of polysilicon ingot furnace, high temperature resistance protective layer and preparation method thereof
A technology for polysilicon ingot casting furnaces and corrosion-resistant coatings, which is applied in anti-corrosion coatings, polycrystalline material growth, chemical instruments and methods, etc., can solve the problem of increased wear, affecting the heat insulation effect of carbon fiber heat insulation layers, and carbon fiber heat insulation layers Reduced density and other issues, to achieve the effect of reducing energy consumption, not easy to change, and preventing the accumulation of impurities
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[0053] The preparation steps of the high temperature resistant protective layer provided by the invention are as follows:
[0054] 1) After uniformly mixing the curing agent and the dispersing agent according to the proportion, apply it to the surface of the carbon fiber heat insulation layer under the condition of 10°C-100°C and relative humidity <90%.
[0055] 2) Put the mixture of carbon fiber powder and graphite powder, heat insulation material powder and film-forming agent into the disperser according to the proportion, mix thoroughly, and then apply to the surface of the carbon fiber heat insulation layer that has been coated with curing agent and dispersant. Apply evenly, the coating thickness is consistent, the coating thickness is about 3mm.
[0056] 3) Put the carbon fiber heat insulation layer coated with corrosion-resistant coating into a vacuum heating furnace, heat to 75°C-85°C in a vacuum state, and keep the temperature constant for 1.5-3 hours.
[0057] The hi...
Embodiment
[0059] The present invention prepares the step of high temperature resistant protective layer:
[0060] 1) Mix potassium fluorosilicate and tannic acid according to 1:1, put them into a disperser for stirring, the amount of potassium fluorosilicate and tannic acid is 2wt% of the corrosion-resistant coating, at 20 ℃, relative humidity Under the condition of 80%, the uniformly stirred mixture is applied to the surface of the carbon fiber heat insulation layer. The potassium fluorosilicate is a product of Changshu Xinhua Chemical Co., Ltd., and the tannin is a product of Jiangsu Yonghua Fine Chemical Co., Ltd. The product.
[0061] 2) Weigh the mixture of carbon fiber powder and graphite powder according to the content of 88% in the corrosion-resistant coating, the weight ratio of carbon fiber powder and graphite powder is 3:1, and the fiber length of the carbon fiber powder is 38 μm to 44 μm, which is Shanghai The product of Yingjia Special Fiber Material Co., Ltd., the particl...
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