SrAl12O19
Strontium hexaaluminate · Sr-beta-alumina
Strontium hexaaluminate is a thermally robust, insulating oxide ceramic used primarily as a stable support material in high-temperature catalytic systems.
About Strontium hexaaluminate
Strontium hexaaluminate is a structurally complex oxide that functions as a wide-gap insulator. Its robust thermodynamic stability makes it a highly reliable candidate for demanding industrial environments where structural integrity under thermal stress is paramount.
Because of its refractory nature, this material is primarily utilized in high-temperature catalytic processes and as a stable ceramic substrate. Its ability to maintain its phase identity at elevated temperatures allows it to serve as a long-lasting support for active catalytic species.
Key Properties
Cross-validated computational properties for Strontium hexaaluminate, aggregated across 2 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.
Reported Structures
Lowest-energy structures reported for SrAl12O19, ranked by energy above hull.
| Space GroupSymmetry classification of the crystal arrangement. The number is the international space-group index. | Crystal SystemBroad lattice family, such as cubic, tetragonal, monoclinic, or triclinic, derived from unit-cell symmetry. | Band Gap (eV)Electronic gap calculated for this specific reported structure, measured in electronvolts. | E above hull (eV/atom)Thermodynamic distance from the convex hull for this structure, normalized per atom. Lower is generally more stable. | E/atom (eV)Computed total energy normalized per atom. Use energy above hull, not this value alone, when comparing stability. | Density (g/cm³)Mass per relaxed crystal volume, reported in grams per cubic centimeter. |
|---|---|---|---|---|---|
| P63mc (No. 186) | hexagonal | 4.46 | 0.0023 | -7.834 | 3.92 |
| P63/mmc (No. 194) | hexagonal | 4.45 | 0.0028 | -7.833 | 3.91 |
| P63/mmc (No. 194) | — | — | — | — | — |
Synthesis Routes
Literature-extracted synthesis procedures targeting SrAl12O19.
Applications
Where Strontium hexaaluminate is used.
Frequently Asked Questions
Common questions about Strontium hexaaluminate, answered from cross-validated data.
What is SrAl12O19?
Strontium hexaaluminate is a thermally robust, insulating oxide ceramic used primarily as a stable support material in high-temperature catalytic systems.
What is SrAl12O19 used for?
What is the band gap of SrAl12O19?
Is SrAl12O19 a metal, semiconductor, or insulator?
Is SrAl12O19 thermodynamically stable?
What is the crystal structure of SrAl12O19?
What is the density of SrAl12O19?
How many polymorphs of SrAl12O19 are known?
How is SrAl12O19 synthesized?
What elements does SrAl12O19 contain?
Where does the data for SrAl12O19 come from?
How It Compares
Within the spinel oxide catalysts class.
Unlike transition metal-based oxides such as CuO or NiO, which are often prized for their redox activity and electronic conductivity, SrAl12O19 acts as a chemically inert and thermally stable insulator, similar to the role played by MgAl2O4 or Al2O3 in high-temperature catalyst support systems.
Related Compounds
Other Spinel Oxide Catalysts in the database.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
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