Silicon carbide fiber lightweight high-temperature insulating material, and preparation method thereof

Abstract

The invention relates to a silicon carbide fiber lightweight high-temperature insulating material, and a preparation method thereof, and belongs to the field of inorganic material. According to the preparation method, silicon carbide fiber is taken as a main raw material of a lightweight silicon carbide ceramic material, silicon resin or polycarbosilane is taken as a binder, suction filtration moulding and high temperature ceramization are combined, and porous silicon carbide ceramic is prepared. Silicon carbide fiber is arranged along a plane direction in the porous silicon carbide ceramic, is bond together via SiOC or SiC obtained via silicon resin or polycarbosilane ceramization, and possesses excellent mechanical properties and heat insulation performance.

Description

Technical field

[0001] The invention discloses a silicon carbide fiber lightweight high-temperature thermal insulation material and a preparation method thereof, belonging to the technical field of inorganic materials, and can be used for thermal protection of high-temperature equipment or devices. Background technique

[0002] Lightweight high-temperature insulation materials have a wide range of important applications in aviation, aerospace, metallurgy, nuclear energy and other fields. Foam ceramics, ceramic fiber felts and carbon fiber felts are common high-temperature insulation materials. Foam ceramics are cheap and simple in preparation process, but their thermal conductivity is high, heat insulation performance is poor, and the density is high. Ceramic fiber felts, such as aluminum silicate fiber felts, mullite fiber felts and other thermal insulation performance are better than foam ceramics, but the disadvantage is that ceramic fiber products are flexible and have poor m...

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