Al2O3
Alumina · Aluminum oxide, Corundum
Alumina is a chemically stable, insulating aluminum oxide widely utilized as a structural component and a versatile support material for catalysts.
About Alumina
Alumina is a thermodynamically stable oxide that serves as a cornerstone material in materials science. Its wide-band-gap electronic character makes it an exceptional electrical insulator, while its structural robustness ensures longevity in demanding chemical environments.
Because of its chemical inertness and high surface area potential, it is widely utilized as a catalyst support. It provides a stable framework for active metal phases, facilitating efficient chemical transformations across various industrial processes.
Key Properties
Cross-validated computational properties for Alumina, aggregated across 3 databases.
Band GapEnergy needed to move an electron from the valence band to the conduction band. Lower or zero values tend to behave more metallic; larger gaps are more insulating or semiconducting.
Energy Above HullThermodynamic distance from the most stable set of competing phases. 0 eV/atom is on the convex hull; small positive values may still be experimentally accessible.
StabilityA plain-language summary of the best reported energy-above-hull result. It reflects whether the lowest-energy structure is on, near, or far from the stability hull.
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
Synthesis Routes
Literature-extracted synthesis procedures targeting Al2O3.
Applications
Where Alumina is used.
Patent Landscape
58 patents reference Al2O3 or close compositional variants.
| Patent | Title | Assignee | Granted |
|---|---|---|---|
| 7763346 | Surface coated cutting tool made of cermet having property-modified α type Al2O3 layer of hard coating layer | — | — |
| 8834833 | Process for preparing an aluminium oxide powder having a high alpha-Al2O3 content | — | — |
| 8551319 | Solid polycrystalline potassium ion conductor having a β″-Al2O3 structure, its production and the preparation | — | — |
| 6592640 | Fused Al2O3-Y2O3 eutectic abrasive particles, abrasive articles, and methods of making and using the same | — | — |
| 6673132 | SiO2/Al2O3 composite abrasive and method for producing the same | — | — |
| 6372679 | Cr2O3-Al2O3 sintered body and processes for producing same | — | — |
| 9902654 | ZrO2-Al2O3-based ceramic sintered compact and production method thereof | — | — |
| 7459408 | Al2O3 dispersion-strengthened Ti2AlN composites and a method for producing the same | — | — |
| 7169198 | Microcrystalline α-Al2O3 shaped body, method for the production and use thereof | — | — |
| 7141523 | Ceramics comprising Al2O3, REO, ZrO2 and/or HfO2, and Nb2O5 and/or Ta2O5 and methods of making the same | — | — |
Frequently Asked Questions
Common questions about Alumina, answered from cross-validated data.
What is Al2O3?
Alumina is a chemically stable, insulating aluminum oxide widely utilized as a structural component and a versatile support material for catalysts.
What is Al2O3 used for?
What is the band gap of Al2O3?
Is Al2O3 a metal, semiconductor, or insulator?
Is Al2O3 thermodynamically stable?
How many polymorphs of Al2O3 are known?
How is Al2O3 synthesized?
What elements does Al2O3 contain?
Where does the data for Al2O3 come from?
How It Compares
Within the spinel oxide catalysts class.
Within the family of spinel and complex oxides, Alumina stands out for its extreme thermodynamic stability and insulating nature compared to transition metal-based catalysts like CuO or NiO. While materials such as LaAlO3 share structural similarities in their oxide frameworks, Alumina is primarily valued for its role as an inert, high-performance substrate rather than for the redox-active properties found in perovskites like LaMnO3 or BiFeO3.
Related Compounds
Other Spinel Oxide Catalysts in the database.
Data sources & attribution
- latticegraph — Lattice Graph Materials Intelligence Platform
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