Preparation method of hard composite carbon fiber heat insulation material

A technology of composite carbon fiber and thermal insulation materials, which is applied in the field of hard composite fiber thermal insulation materials, can solve problems such as unreliable bonding, no surface coating treatment, low temperature, etc., to solve the problems of internal penetration and pollution, and low temperature Oxidation problem, effect of increased interlaminar shear strength

Inactive Publication Date: 2012-07-04
HUNAN HAIXIN NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] 1. Insufficient impregnation, forming agent on the surface of the original felt, but uneven inside;
[0015] 2. The formed hard composite felt is easy to delaminate during use, the combination is not reliable, and the bending st

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A method for making a rigid composite carbon fiber thermal insulation material, comprising the steps of:

[0047] (1), the raw material is soft carbon felt (long carbon fiber felt, density is 0.1g / cm3) soaked in the binder epoxy resin that has added surfactant (choose absolute ethanol to dilute), fully stir Uniform;

[0048] (2), after the material obtained in the step (1) is cured, the surface of the solidified blank is coated with an antioxidant, and dried;

[0049] (3) Put the blank dried in step (2) into a high-temperature graphitization furnace, and perform high-temperature graphitization treatment at a temperature above 2200° C. to obtain a rigid composite carbon fiber insulation material.

Embodiment 2

[0051] The production method of this embodiment is the same as that of Example 1, specifically, the solidification in step (2) in Example 1 refers to that the blank (short carbon fiber felt, density is 0.12g / cm3) is fixed to the desired shape with a mould. Add the curing agent benzenesulfonic acid, and then put the blank together with the mold into a low-temperature oven for preliminary shaping and curing.

Embodiment 3

[0053] The production method of this embodiment is the same as that of Example 2. In order to make the resulting rigid composite carbon fiber thermal insulation material can be used better, it also includes a cutting step to the blank before step (2) in Example 2. Cutting The first step is to make the blank meet the requirements of the hard tube material it is used for.

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PUM

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Abstract

The invention relates to a preparation method of a hard composite carbon fiber heat insulation material, belonging to the technical field of the surface treatment process of heat insulation materials. The preparation method comprises the following steps: (1) soaking a blank made of soft carbon felt into a binding agent mixed with a surfactant, and fully and uniformly stirring; (2) curing the material obtained in the step (1), then coating a layer of antioxidant on the surface of the cured blank and drying; and (3) placing the blank dried in the step (2) into a high-temperature graphitizing furnace, and performing high-temperature graphitizing at the temperature higher than 2200 DEG C to finally obtain the high-performance hard composite carbon fiber heat insulation material. According to the preparation method disclosed by the invention, the binding agent and the carbon felt are mixed fully, the interlayer viscosity of the carbon felt can be enhanced, inter-layer shearing strength and anti-oxidation performance are improved, and the degree of graphitizing is higher and fuller; moreover, volatile substances can be effectively prevented from invading the inner layer of a graphite felt and the service life is further prolonged.

Description

technical field [0001] The invention belongs to the technical field of surface treatment technology for thermal insulation materials, and in particular relates to a method for making a hard composite fiber thermal insulation material. Background technique [0002] At present, with the continuous development of the vacuum furnace industry, especially the large demand for single crystal furnaces and polycrystalline furnaces in the solar energy industry, the hard graphite felt produced by the existing technology cannot meet its use requirements. A high-quality high-temperature , High-purity, high-strength rigid graphite insulation felt has become an urgent need for vacuum furnace application companies. [0003] The insulation materials used in traditional high-temperature vacuum furnaces mostly use carbon fiber soft felt, which must be attached to a certain steel structure support (carbon felt frame). When the temperature exceeds 1500 ° C, the temperature of the carbon felt fra...

Claims

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Application Information

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IPC IPC(8): C04B35/83C04B35/622
Inventor 陈新华
Owner HUNAN HAIXIN NEW MATERIALS
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