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Method for preparing solidified carbon felt through spraying method

A technology of spraying method and carbon felt, which is applied in the field of preparing solidified carbon felt by spraying method, which can solve the problems of affecting the installation accuracy, high fiber density, and uneven density of solidified carbon felt, so as to improve thermal insulation performance, service life, and heat conduction The effect of reducing the coefficient and improving the uneven distribution of resin pyrolytic carbon

Active Publication Date: 2019-10-15
LIAOCHENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above two methods all have the problem of poor resin distribution uniformity
The first method, due to the high fiber density in the contact area of ​​the multi-layer soft felt, the resin is easy to accumulate, resulting in uneven density of the cured carbon felt and poor thermal insulation performance
In the second method, because the resin is brushed on the surface of the soft felt, the resin content inside the soft felt is very small, or there is almost no resin, resulting in weak self-supporting properties of the prepared cured carbon felt, which affects the installation accuracy

Method used

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  • Method for preparing solidified carbon felt through spraying method

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Embodiment 1

[0026] A method for preparing solidified carbon felt by spraying method, comprising the following steps:

[0027] (1) Wash the carbon fiber soft felt in water at 100°C for 30 minutes, then bake in an oven at 120°C for 6 hours;

[0028] (2) Configure spray resin solution, mix phenolic resin, absolute ethanol, acetone, N,N'-ethylene bisstearamide, and graphite powder according to the mass ratio of 40:35:15:7:3, and Stir for 15 minutes; the phenolic resin is a thermosetting resin with a curing temperature of 120°C.

[0029] (3) Laminate the soft felt treated in step (1), heat the solution prepared in step (2) to 60°C, spray it on the upper surface of the laminated soft felt through a porous nozzle, and let it flow down naturally; the porous The number of holes per square centimeter of the nozzle is 25, and the diameter of the holes is 0.5 mm.

[0030] (4) Put the soft felt sprayed in step (3) into the press, and use 5N / cm 3 pressurize, and heat and solidify through the upper a...

Embodiment 2

[0033] A method for preparing solidified carbon felt by spraying method, comprising the following steps:

[0034] (1) Wash the carbon fiber soft felt in water at 100°C for 30 minutes, then bake in an oven at 120°C for 6 hours;

[0035] (2) Configure spray resin solution, mix phenolic resin, absolute ethanol, acetone, N,N'-ethylene bisstearamide, and graphite powder according to the mass ratio of 50:25:15:7:3, and Stir for 15 minutes; the phenolic resin is a thermosetting resin with a curing temperature of 120-140°C.

[0036] (3) Laminate the soft felt treated in step (1), heat the solution prepared in step (2) to 80°C, spray it on the upper surface of the laminated soft felt through a porous nozzle, and let it flow down naturally; the porous The number of holes per square centimeter of the nozzle is 35, and the diameter of the holes is 1.5 mm.

[0037] (4) Put the soft felt sprayed in step (3) into the press, and use 5N / cm 3 The pressure is increased, and the upper and lowe...

Embodiment 3

[0040] A method for preparing solidified carbon felt by spraying method, comprising the following steps:

[0041] (1) Wash the carbon fiber soft felt in water at 100°C for 30 minutes, then bake in an oven at 120°C for 6 hours;

[0042] (2) Configure the spray resin solution, mix phenolic resin, absolute ethanol, acetone, N,N'-ethylene bisstearamide, and graphite powder according to the mass ratio of 45:35:13:5:2, and Stir for 15 minutes; the phenolic resin is a thermosetting resin with a curing temperature of 130°C.

[0043] (3) Laminate the soft felt treated in step (1), heat the solution prepared in step (2) to 70°C, spray it on the upper surface of the laminated soft felt through a porous nozzle, and let it flow down naturally; the porous The number of holes per square centimeter of the nozzle is 30, and the diameter of the holes is 1.0 mm.

[0044] (4) Put the soft felt sprayed in step (3) into the press, and use 5N / cm 3 The pressure is increased, and the upper and lowe...

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Abstract

The invention discloses a method for preparing solidified carbon felt through a spraying method. The method comprises the following steps: (1) washing carbon fiber soft felt and drying; configuring aspraying resin solution, mixing phenolic resin, absolute ethyl alcohol, acetone, lubricant and graphite powder according to a mass ratio, stirring for 15min; laminating the treated soft felt, and heating the configured solution to 60-80 DEG C, and spraying to an upper surface of the laminated soft felt through a porous nozzle to naturally flow down; placing the sprayed soft felt in a press, pressurizing in the pressure of 5N / cu.cm., and performing heating and solidification through an upper platen and a lower platen; and placing the obtained yield in a vacuum furnace, and keeping temperature for 30-120min. Through the spraying way, the resin is coated on the fiber surface, and a carbon fiber pretreatment process suitable for the spraying method is proposed; the resin uniformity can be greatly improved, and the thermal insulation performance is improved.

Description

technical field [0001] The invention belongs to the technical field of thermal insulation materials, and specifically relates to a method for preparing solidified carbon felt by spraying. . Background technique [0002] In the semiconductor and solar industry, monocrystalline silicon and polycrystalline silicon are a very important semiconductor material. In industrial production, the purity of monocrystalline silicon and polycrystalline silicon used in semiconductors and solar energy is required to be very high. Therefore, carbon fiber felt is generally used as the insulation layer for the high-temperature furnaces that produce monocrystalline silicon and polycrystalline silicon. Carbon fiber felt is divided into soft felt and solidified carbon felt. The soft felt is the felt directly punched by carbon fiber, with a density of 0.1g / cm 3 Below, the texture is softer. Cured carbon felt is based on soft felt, the surface of carbon fiber is covered by resin pyrolytic carbon...

Claims

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Application Information

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IPC IPC(8): C04B30/02
CPCC04B30/02C04B14/386
Inventor 赵伟仪修杰位登虎
Owner LIAOCHENG UNIV