Recent Advancements in Alumina-Based High-Temperature Insulating Materials: Properties, Applications, and Future Perspectives

Abstract

As a high-temperature thermal insulation material with excellent mechanical properties, alumina (Al₂O₃)-based materials hold significant potential for applications in aerospace, advanced manufacturing, automobiles, industrial furnaces, and other fields. However, the inherent brittleness of alumina poses a limitation to its wider application. Therefore, there is a pressing need to develop alumina-based materials that offer high toughness while retaining superior mechanical properties. This paper begins by exploring the structure of alumina, highlighting its thermal conductivity, insulation, and mechanical properties in high-temperature environments. It then reviews the classification and synthesis methods of alumina-based materials, along with the latest advances in design strategies. Notably, the rational design of alumina composition, structure, and morphology is emphasized as crucial for optimizing material performance, thereby supporting the industrial development and application of these materials in high-tech sectors. Finally, the paper discusses the challenges and evolution of alumina-based materials in real-world industrial applications and suggests potential directions for future development.

Keywords

Alumina-based materials / High-temperature / Insulating materials / Synthesis / Aerospace applications / Industrial furnace applications / Environmentally friendly materials

Author Contributions

Conceptualization, Y.X. and D.C.; Data Curation, Y.S., Q.Z., S.L., Z.C., Writing-Original Draft Preparation, Y.S., Q.Z., S.L., Z.C.; Writing-Review & Editing, Y.X.; Visualization, Y.S., Q.Z.; Project Administration, D.C.; Funding Acquisition, X. J., D.C.

Ethics Statement

Not applicable.

Informed Consent Statement

Not applicable.

Funding

This work was financially supported by the Young Scholars Program of Shandong University, the National Natural Science Foundation of China(grant 22275116),and the Natural Science Foundation of Shandong Province (Major Basic Research) project(grant ZR2023ZD19)

Declaration of Competing Interest

The authors declare no competing financial interest.

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