Method for preparing aluminum oxide foamed ceramic through low-temperature sintering and high-performance aluminum oxide foamed ceramic

By employing low-temperature sintering and particle-stabilized foaming methods, the challenges of material integrity and mechanical properties in the preparation of alumina foam ceramics at high temperatures were solved, resulting in alumina foam ceramics with high porosity, excellent mechanical properties, and thermal insulation performance, while reducing preparation energy consumption and costs.

CN120965360APending Publication Date: 2025-11-18TSINGHUA UNIVERSITY
View PDF 1 Cites 0 Cited by

Patent Information

Application Number
CN202511187619.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-08-22
Publication Date
2025-11-18

AI Technical Summary

Technical Problem

In the preparation of alumina foam ceramics, the high-temperature sintering of existing technology makes it difficult to balance the integrity and mechanical properties of the material, and there is a contradiction between porosity and strength. In addition, the process cost is high.

Method used

Alumina foam ceramics were prepared by using a low-temperature sintering method, with aluminum powder as the main raw material and surfactant added, and by sintering at 800-1100℃ through a particle-stabilized foaming method, with the heating rate controlled at 0.4-2℃/min.

Benefits of technology

Alumina foam ceramics with high porosity (above 90%), high strength (compressive strength at room temperature above 1 MPa) and low thermal conductivity (below 0.2 W/(m·k)) were prepared at low temperatures, reducing energy consumption, lowering process costs, and improving thermal insulation performance.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN120965360A_ABST
    Figure CN120965360A_ABST
Patent Text Reader

Abstract

The invention relates to a method for preparing aluminum oxide foamed ceramic through low-temperature sintering and high-performance aluminum oxide foamed ceramic. The method comprises the following steps: mixing aluminum powder, water and optional alumina powder to obtain a ceramic suspension; adding a surfactant into the ceramic suspension, and stirring to obtain wet foam; drying the wet foam to obtain a dried green body; and sintering the dried green body at the temperature of 800-1100 DEG C to obtain the aluminum oxide foamed ceramic. The method has the advantages of less raw material composition, simple process flow, low sintering temperature and high aluminum oxidation degree, and can ensure the integrity of the product. The aluminum oxide foamed ceramic prepared by the invention has high porosity, relatively high mechanical property and relatively low heat conductivity coefficient.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Preparation method of high-performance foamed ceramic and product prepared by preparation method

    CN119683967A