High-temperature stable cordierite ceramic material

Abstract

The invention discloses a high-temperature stable cordierite ceramic material. The material is characterized by comprising the following substances by weight: 35 to 54 parts of nanometer aluminum oxide powder, 30 to 70 parts of non-crystalline silica powder, 15 to 20 parts of magnesium carbonate, 1 to 5 parts of barium carbonate, 3 to 11 parts of zirconium silicate, 11 to 19 parts of diboron trioxide, 15 to 20 parts of talc, 15 to 20 parts of clay, 11 to 18 parts of magnesium oxide, 15 to 60 parts of kaolin, 1 to 5 parts of pyrophyllite, 4 to 11 parts of talc porcelain, 10 to 20 parts of quartz, 3.5 to 7.4 parts of magnesium hydroxide, 20 to 30 parts of cyclohexanone and 15 to 36 parts of methylbenzene. The invention has the following beneficial effects: the cordierite ceramic material provided by the invention has excellent performances, achieves good dielectric property, is extensively applied in preparation of ceramic devices with excellent dielectric property and high high-temperature stability, has simple preparation process and low cost, and is suitable for industrial production.

Description

Technical field [0001] The invention relates to a cordierite ceramic material with high temperature stability. Background technique [0002] Cordierite ceramics have low thermal expansion coefficient, excellent high temperature stability, good dielectric properties and infrared radiation ability, excellent chemical stability, etc., so they are used in the automotive, environmental protection, metallurgy, chemical, electronics, and aerospace industries. More and more applications are found in fields with strict requirements for high temperature resistance and thermal expansion performance. Cordierite was first synthesized and named in 1889, and there are mainly two crystal types, namely high temperature α type and low temperature β type. The high-temperature α-type has the advantages of high mechanical strength and high thermal shock resistance, and is a high-temperature stable phase, so the proportion of the α-type cordierite phase contained in the material should be as high as ...

AI Technical Summary

Problems solved by technology

[0004] The content of α-type cordierite in the cordierite ceramic materials prepared by the above three methods is low, there are a lot of impurities or glass phases, and the mechanical strength is not high enough

There is no research on the preparation of pure α-type cordierite ceramic materials with higher mechanical strength and lower thermal expansion coefficient by introducing nano-alumina and amorphous silica as raw materials and adopting atmosphere protection hot pressing sintering method to report