Thermal insulation structure and high-temperature furnace

Abstract

The invention relates to a thermal insulation structure, which comprises an outer layer and an inner layer, and the inner layer is sealed inside the outer layer, and is made of thermal insulation material. The thermal insulation structure is of a sandwich structure formed by the inner layer and the outer layer, the inner layer is sealed inside the outer layer, and by combining the characteristic of the heat reflection of the outer layer with the characteristic of the heat insulation of the inner layer, the purpose of thermal insulation can be better realized, and the effect of thermal insulation can be remarkably improved in comparison with material only using the outer layer to reflect heat. In addition, the invention also provides a high-temperature furnace using the thermal insulation structure.

Description

technical field [0001] The invention relates to the technical field of high-temperature furnace equipment, in particular to a heat preservation structure and a high-temperature furnace. Background technique [0002] At present, due to limited high-temperature resistant materials, and due to technical and cost constraints, many high-temperature equipment consumes a lot of power and costs, and the thermal field is still unstable. And these all depend on a very important factor, that is, the thermal insulation effect of the thermal insulation material. High-temperature materials must not only meet the application of high-temperature environments, but also meet the requirements of not polluting the prepared materials at high temperatures. For example, the current sapphire crystal growth furnace realizes crystal growth in a high temperature environment higher than 2000 ° C. The insulation materials are mainly tungsten and molybdenum in the high temperature area and alumina hollo...

AI Technical Summary

Problems solved by technology

For example, the current sapphire crystal growth furnace realizes crystal growth in a high temperature environment higher than 2000 ° C. The insulation materials are mainly tungsten and molybdenum in the high temperature area and alumina hollow balls or zirconia bricks in the low temperature area. The distance from the heating chamber The nearer area is the high temperature area, and the area farther away from the heating chamber is the low temperature area. The heat preservation mechanism is mainly to reduce the heat loss through the reflection of heat on the tungsten and molybdenum materials in the high temperature area, and to reduce the heat loss in the low temperature area through fillers such as alumina. Reduce heat transfer and reduce heat loss, but the thermal conductivity of alumina is high, and at the same time, the single-layer tungsten-molybdenum structure in the high-temperature area is prone to deformation at high temperature. Such thermal insulation structure is greatly restricted in production and application. The effect is not up to the requirement

Compared with oxide materials such as alumina hollow spheres, graphite materials have low thermal conductivity and can withstand high temperatures, but carbon atoms will volatilize under high temperature conditions, polluting the produced products

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