Y2Hf2O7
Yttrium hafnate · YHO
Yttrium hafnate is a stable, insulating oxide-ion conductor used in high-temperature materials and protective coatings.
About Yttrium hafnate
Yttrium hafnate is a thermodynamically stable oxide that crystallizes in a fluorite-related structure. As a wide-band-gap insulator, it exhibits excellent chemical and structural integrity, making it a robust candidate for high-temperature environments where ionic conductivity and thermal stability are required.
This compound is primarily utilized in advanced materials science for its ability to withstand extreme conditions. Its role as an oxide-ion conductor is highly valued in the development of protective coatings and electrolyte components, where its structural reliability ensures long-term performance in demanding industrial applications.
Key Properties
Cross-validated computational properties for Yttrium hafnate, 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 Y2Hf2O7.
Applications
Where Yttrium hafnate is used.
Frequently Asked Questions
Common questions about Yttrium hafnate, answered from cross-validated data.
What is Y2Hf2O7?
Yttrium hafnate is a stable, insulating oxide-ion conductor used in high-temperature materials and protective coatings.
What is Y2Hf2O7 used for?
What is the band gap of Y2Hf2O7?
Is Y2Hf2O7 a metal, semiconductor, or insulator?
Is Y2Hf2O7 thermodynamically stable?
How many polymorphs of Y2Hf2O7 are known?
How is Y2Hf2O7 synthesized?
What elements does Y2Hf2O7 contain?
Where does the data for Y2Hf2O7 come from?
How It Compares
Within the fluorite oxide-ion conductors class.
Within the family of fluorite oxide-ion conductors, Yttrium hafnate stands out for its exceptional stability compared to counterparts like Y2Zr2O7. While many zirconate-based members of this class are widely studied for their ionic transport properties, the hafnate variant provides a distinct alternative that often offers superior thermal resistance, positioning it as a critical material for high-performance engineering tasks.
Related Compounds
Other Fluorite Oxide-Ion Conductors in the database.
Data sources & attribution
- latticegraph — Lattice Graph Materials Intelligence Platform
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