Composite material for high-temperature-resistant high-heat-conductivity infrared radiation sagger and preparation method thereof

Abstract

The invention discloses a composite material for a high-temperature-resistant high-heat-conductivity infrared radiation sagger. The composite material is prepared from the following ingredients including 65 to 80 weight percent of fused alumina, 2 to 8 weight percent of Al2O3, 8 to 15 weight percent of SiC, 2 to 7 weight percent of B4C, 2 to 9 weight percent of ZrO2 and 6 to 12 weight percent of SiO2. The novel composite material formed by adding the Al2O3, the SiC, the B4C, the ZrO2 and the SiO2 in the fused alumina and performing high-temperature synthesis has the advantages of high temperature resistance, high heat conduction coefficient and high infrared ray radiation rate; the sagger made by using the material achieves the effects that a ceramic product contained in the sagger can be uniformly and quickly heated; and the defect of cracking of the product due to temperature differences is overcome, so that the product qualification rate is improved.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a high-temperature-resistant high-thermal conductivity infrared radiation sagger composite material and a preparation method thereof. Background technique [0002] Saggers for loading high alumina ceramic products are usually made of ordinary corundum, mullite, etc. Such saggers have low thermal conductivity and low infrared radiation rate. However, during the firing process of ceramic products, heat is mainly transferred by heat conduction. Saggers with low thermal conductivity may easily cause large temperature differences and uneven heating of various parts of the ceramic products loaded in them, which will cause internal stress on the ceramic products and make the products easy to burn. Cracking seriously affects the qualified rate of fired products. [0003] Therefore, it has become an urgent problem for those skilled in the art to invent a composite material...

AI Technical Summary

Problems solved by technology

[0002] Saggers for loading high alumina ceramic products are usually made of ordinary corundum, mullite, etc. Such saggers have low thermal conductivity and low infrared radiation rate

However, during the firing process of ceramic products, heat is mainly transferred by heat conduction. Saggers with low thermal conductivity may easily cause large temperature differences and uneven heating of various parts of the ceramic products loaded in them, which will cause internal stress on the ceramic products and make the products easy to burn. Cracking seriously affects the qualified rate of fired products