Preparation method of high-temperature-resistant high-strength expanded vermiculite-based light-weight thermal insulation composite material

By grading and pressing materials such as expanded vermiculite, a high-temperature resistant and high-strength expanded vermiculite-based lightweight thermal insulation composite material was prepared, which solved the problems of low strength and short life of traditional materials and achieved better thermal insulation and mechanical properties.

CN122102650APending Publication Date: 2026-05-29SINOSTEEL LUOYANG INSTITUTE OF REFRACTORIES RESEARCH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SINOSTEEL LUOYANG INSTITUTE OF REFRACTORIES RESEARCH CO LTD
Filing Date
2026-04-02
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Traditional lightweight insulation materials have low mechanical strength, poor thermal shock resistance, and short service life, and cannot meet the requirements for high temperature resistance.

Method used

A high-temperature resistant and high-strength expanded vermiculite-based lightweight thermal insulation composite material is prepared by using expanded vermiculite, silica powder, fumed silica, short-cut high-silica fibers, water glass as a binder, and silicon carbide as a light-blocking agent. The materials are graded according to density, uniformly mixed, and then pressed into shape.

Benefits of technology

It improves the mechanical and heat resistance properties of the material, reduces the coefficient of thermal expansion, enhances the thermal insulation effect, and extends the service life.

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Abstract

The application discloses a preparation method of high-temperature-resistant high-strength expanded vermiculite-based light heat-insulation composite material, relates to the field of light heat-insulation composite material, and the preparation method is characterized in that expanded vermiculite, silicon powder, fumed silica, chopped high-silica fiber and a binding agent sodium silicate and an opacifier silicon carbide are uniformly stirred and mechanically pressed to form; the adding sequence is from large to small according to the density, the silicon carbide and the silicon powder with the largest density are firstly added, then the expanded vermiculite is added, then the fumed silica is added, and finally the binding agent sodium silicate and the chopped high-silica fiber are added; the expanded vermiculite is used as the aggregate of the expanded vermiculite-based light heat-insulation composite material, different types and particle sizes of material particles are uniformly mixed and then pressed to form, heat dissipation through a solid phase conduction path is reduced, heat loss is effectively inhibited, the overall heat-insulation and heat-preservation effect and the mechanical properties of the material are improved, and the heat-resistant temperature of the material is also improved.
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