NbFeSb
metal· NbFeSb
NbFeSb is an intermetallic compound combining niobium, iron, and antimony, representing a research-phase material within the broader family of refractory and half-Heusler intermetallics. This material is being investigated primarily for thermoelectric applications where the combination of metallic conductivity and low thermal transport could enable efficient thermal energy conversion, and secondarily for high-temperature structural applications where niobium-based intermetallics offer improved strength retention at elevated temperatures compared to conventional superalloys.
thermoelectric deviceshigh-temperature structural applicationswaste heat recoveryresearch/development phaserefractory intermetallicsenergy conversion systems
Compliance & Regulations
?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)2 entries | 165.8 | GPa | — | ||
| ↳ | 166.4 | GPa | — | ||
Poisson's Ratio(ν) | 0.3000 | - | — | ||
Shear Modulus(G)2 entries | 81.29 | GPa | — | ||
| ↳ | 79.70 | GPa | — |
N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form / heat treatment / basis.
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 8.437 | kg/m³ | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 0.7480 | eV | — | ||
Dielectric Constant (Relative Permittivity)(εr)3 entries | 45.23 | - | — | ||
| ↳ | 45.35 | - | — | ||
| ↳ | 33.44 range 24.10–42.77median of 2 measurements | - | — | ||
Electronic Dielectric Tensor(ε∞) | Matrix (redacted) | - | — | ||
Total Dielectric Tensor(ε) | Matrix (redacted) | - | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Piezoelectric Modulus(eij)2 entries | 1.339 | C/m² | — | ||
| ↳ | 0.9641 | C/m² | — | ||
Piezoelectric Stress Tensor(eij) | Matrix (redacted) | C/m² | — | ||
Seebeck Coefficient(S) | -198.9 | µV/K | — |
N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form / heat treatment / basis.
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.000 | eV/atom | — | ||
Formation Energy(ΔHf) | -0.3413 | eV/atom | — |
Verified Unverified Low confidence (<80%) Link to source
Regulatory Screening
Environmental
Export Control
RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.