Carbon fiber thermal insulation cured felt

Abstract

The invention provides a carbon fiber thermal insulation cured felt. The carbon fiber thermal insulation cured felt comprises an inner felt layer, a middle felt layer and an outer felt layer, whereinthe inner felt layer and the outer felt layer are respectively adhered to the two sides of the middle felt layer; the densities of the inner felt layer, the middle felt layer and the outer felt layerare reduced in sequence; the thicknesses of the inner felt layer, the middle felt layer and the outer felt layer are increased in sequence; the inner felt layer is filled with a carbon/carbon composite material; the middle felt layer is filled with a hard fiber hard felt. The carbon fiber thermal insulation cured felt has the advantages that the inner felt layer, the middle felt layer and the outer felt layer are compounded through resin and a carbon binder, the high temperature deformation resistance capacity of the inner felt layer can be enhanced through the adding of the carbon binder andthe improvement of the density of the inner layer thermal insulation felt, the structure is low in cost, an inner felt layer adopting a separated structure is fixed through a countersunk nut and a hard felt, in order to solve the problem of fixing of a thin carbon plate, the carbon plate is pressed into a local strengthened irregular structure, after a carbon/carbon protective plate loses effectiveness, a protective plate in the innermost layer is only required to be replaced, the structure is beneficial to the reduction of failure rate, and the service life is prolonged.

Description

technical field [0001] The invention relates to carbon fiber materials, in particular to a carbon fiber thermal insulation and curing felt. Background technique [0002] With the development of the photovoltaic industry, the demand for crystalline silicon is increasing day by day, and the demand for heat shields, one of the consumables for crystalline silicon ingot furnaces, is also increasing. Due to its low operating temperature (<1800°C), traditional heat insulation materials are highly polluting, and it is difficult to make a thin heat insulation layer, which increases the volume of the furnace body, thus limiting its application in crystal growth furnaces. The new carbon thermal insulation material - carbon felt has excellent properties such as small thermal conductivity, low heat capacity, low density, small linear expansion coefficient, high temperature resistance, strong thermal shock resistance, strong chemical corrosion resistance, high purity and no pollution. ...

AI Technical Summary

Problems solved by technology

Commonly used carbon fiber insulation blankets still have room for improvement in terms of oxidation resistance and thermal insulation performance, but have a shorter service life and a higher failure rate

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