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Preparation and application methods of carbon fiber mat surface antioxidation coating

A technology of carbon fiber felt and anti-oxidation coating, which is applied in fiber processing, textiles and papermaking, etc., can solve the problems of poor use effect, rare research reports on the surface coating of thermal insulation layer, and high price, reaching the optional range wide, reduce man-made damage, low cost effect

Inactive Publication Date: 2014-05-07
GANSU HAOSHI CARBON FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the price is expensive, basically 2-3 times that of similar domestic products
Domestic manufacturers directly use graphite coating, but the effect is not good
At the same time, there are few domestic research reports on the surface coating of carbon fiber felt insulation layer.

Method used

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  • Preparation and application methods of carbon fiber mat surface antioxidation coating
  • Preparation and application methods of carbon fiber mat surface antioxidation coating
  • Preparation and application methods of carbon fiber mat surface antioxidation coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] An anti-oxidation coating for the surface of carbon fiber felt insulation materials, containing 90 parts by weight of phenolic resin, 4 parts by weight of boric acid, 5 parts by weight of silicon carbide, 15 parts by weight of benzenesulfonyl chloride and 80 parts by weight of graphite.

[0041] The preparation method of the anti-oxidation coating on the surface of the carbon fiber felt is as follows: 4 parts by weight of boric acid, 80 parts by weight of graphite, 5 parts by weight of silicon carbide and 10 parts by weight of p-toluenesulfonic acid are diluted with 30 parts by weight of industrial ethanol with a concentration of 95%. Finally, 90 parts by weight of phenolic resin was added after mechanical stirring for 20 minutes. Continue to stir for 30-40 minutes until the mixture is homogeneous to obtain an anti-oxidation coating.

[0042] The treatment method of coating the above-mentioned anti-oxidation coating on the surface of carbon fiber felt insulation, the sp...

experiment example 1

[0051] Application examples of carbon fiber felt insulation heat field for monocrystalline silicon furnace:

[0052] figure 1 The thermal field of ordinary graphite coating and the thermal field of the coating of the present invention are used to compare the macroscopic appearance of the exhaust hole after using 48 furnaces for the carbon fiber felt insulation of the single crystal silicon furnace. from figure 1 It can be seen that (a) uses 48 furnaces for the thermal field coated with ordinary graphite, that is, it is scrapped; figure 1 (b) is the quality status of the thermal field coated with the present invention after the same use of furnaces. The thermal erosion of the thermal field exhaust hole of the ordinary coating is serious and leads to scrapping; when the thermal field of the coating of the present invention is used for the same number of times, the damage to the exhaust hole is very small, indicating that the coating seals the opening on the surface of the ther...

Embodiment 2

[0054] An anti-oxidation coating for the surface of carbon fiber felt insulation materials, containing 90 parts by weight of furan resin, 5 parts by weight of boric acid, 2 parts by weight of borate ester, 3 parts by weight of zinc borate, 4 parts by weight of hexamethylenetetramine, 6 parts by weight Parts by weight of p-toluenesulfonic acid, 30 parts by weight of boron carbide, 20 parts by weight of silicon carbide, 15 parts by weight of silicon dioxide and 45 parts by weight of titanium carbide.

[0055] The preparation method of the anti-oxidation coating on the surface of the carbon fiber felt is as follows: use 30 parts by weight and a concentration of 95% acetone solvent as a diluent, first mix 5 parts by weight of boric acid, 2 parts by weight of boric acid ester, and 3 parts by weight of zinc borate under mechanical stirring. Blend for 20 minutes, then blend the mixed solution with 90 parts by weight of furan resin, add 4 parts of hexamethylenetetramine, 6 parts by wei...

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Abstract

The present invention provides preparation and application methods of a carbon fiber mat surface antioxidation coating; after chemical modification of matrix resin by use of an inorganic acid salt, the matrix resin is used as a precursor for blending with inorganic powder, and then coats the surface of a carbon fiber mat thermal insulation material by a brush, and then a high temperature coating with antioxidation and thermal erosion resistance is prepared by curing, carbonization, high temperature and other processes. The raw materials are easy to get, the optional range is wide, the preparation process is simple, the cost is low, the prepared coating structure reduces the specific surface area of the carbon fiber mat thermal insulation material, and further suppresses the aerobic oxidation phenomenon of the carbon fiber mat thermal insulation material at a low temperature, in the environment of high temperature and inert atmosphere, the material surface has a certain of thermal erosion resistance, the service life and long-acting thermal insulation ability of a carbon fiber mat can be prolonged, in addition, the slag-off phenomenon of the coated carbon fiber mat in the use process is suppressed, and the application scope of the carbon fiber mate is broaden.

Description

technical field [0001] The invention belongs to an anti-oxidation coating on the surface of carbon fiber felt, in particular, it relates to the preparation and preparation of a carbon fiber felt surface anti-oxidation and anti-thermal erosion coating material used in a vacuum high-temperature environment or a high-temperature furnace with inert gas protection. How to use it. Background technique [0002] At present, high-temperature vacuum furnaces, inert gas-protected high-temperature furnaces, and various crystal furnaces, such as polycrystalline silicon furnaces or monocrystalline silicon furnaces, mostly use polypropylene nitrile-based carbon fiber felt, viscose-based carbon fiber felt and asphalt-based heat insulation layer materials. Carbon fiber felt. Due to the good heat resistance of carbon fiber felt materials, its average thermal conductivity is 0.22-0.25W / m.k (the temperature in the furnace is 1500°C, and the thickness of the insulation layer is 50mm), the carbo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/41D06M15/39D06M11/74D06M11/80D06M11/77D06M11/79D06M11/45D06M11/82D06M13/256D06M13/358D06M13/262D06C7/04
Inventor 柴昌盛郝学兴陈超杨子元
Owner GANSU HAOSHI CARBON FIBER
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