Ba6Nb4O18Sr2
Ba6Nb4O18Sr2 is a stable, insulating oxide material utilized in the development of lead-free piezoelectric and dielectric technologies.
About Ba6Nb4O18Sr2
Ba6Nb4O18Sr2 is a complex oxide belonging to the family of lead-free piezoelectrics. As a thermodynamically stable phase located on the convex hull, it exhibits robust structural integrity, which is a critical requirement for functional materials intended for long-term device operation.
Characterized by a wide-band-gap insulating electronic structure, this material is engineered to minimize leakage currents in high-field applications. Its unique composition of barium, strontium, niobium, and oxygen allows for tailored dielectric responses, positioning it as a promising candidate for next-generation eco-friendly electronic components.
Key Properties
Cross-validated computational properties for Ba6Nb4O18Sr2, 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.
Reported Structures
Lowest-energy structures reported for Ba6Nb4O18Sr2, 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. |
|---|---|---|---|---|---|
| P63/m (No. 176) | hexagonal | 3.10 | 0.0000 | -8.076 | 5.35 |
| P63/mmc (No. 194) | hexagonal | 3.24 | 0.0158 | -8.060 | 5.30 |
| P-3m1 (No. 164) | trigonal | 2.83 | 0.0209 | -8.055 | 5.64 |
| P63/m (No. 176) | — | — | — | — | — |
| P63/mmc (No. 194) | — | — | — | — | — |
| — | — | — | — | — | 5.10 |
Applications
Where Ba6Nb4O18Sr2 is used.
Frequently Asked Questions
Common questions about Ba6Nb4O18Sr2, answered from cross-validated data.
What is Ba6Nb4O18Sr2?
Ba6Nb4O18Sr2 is a stable, insulating oxide material utilized in the development of lead-free piezoelectric and dielectric technologies.
What is Ba6Nb4O18Sr2 used for?
What is the band gap of Ba6Nb4O18Sr2?
Is Ba6Nb4O18Sr2 a metal, semiconductor, or insulator?
Is Ba6Nb4O18Sr2 thermodynamically stable?
What is the crystal structure of Ba6Nb4O18Sr2?
What is the density of Ba6Nb4O18Sr2?
How many polymorphs of Ba6Nb4O18Sr2 are known?
What elements does Ba6Nb4O18Sr2 contain?
Where does the data for Ba6Nb4O18Sr2 come from?
How It Compares
Within the lead-free piezoelectrics class.
Within the diverse landscape of lead-free piezoelectrics, Ba6Nb4O18Sr2 serves as a specialized alternative to the ubiquitous BaTiO3. While BaTiO3 is the industry standard for many applications, this complex niobate offers distinct structural complexity and stability profiles that differentiate it from simpler perovskite-structured counterparts like KNbO3 or NaTaO3, potentially offering unique performance advantages in specific dielectric environments.
Related Compounds
Other Lead-Free Piezoelectrics in the database.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- aflow — Data from AFLOW. Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
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