Ba2HfS4
ceramic· Ba2HfS4
Ba₂HfS₄ is an inorganic ceramic compound belonging to the thiohafnate family, combining barium, hafnium, and sulfur in a structured lattice. This is a research-phase material studied primarily for its potential in optical, electronic, and thermal applications where sulfide ceramics offer advantages over oxide counterparts, particularly in infrared transparency and semiconductor compatibility. The material represents an emerging class of multivalent ceramic compounds that may find use in specialized photonic devices, solid-state thermal barriers, or next-generation electronic substrates where conventional ceramics prove inadequate.
infrared optical windowssemiconductor substratesresearch photonicsthermal barrier coatingsoptoelectronic devicesemerging ceramics development
Compliance & Regulations
?Conflict Free?RoHS?REACH?TSCA?Prop 65
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)2 entries | 57.61 | GPa | — | ||
| ↳ | 62.37 | GPa | — | ||
Poisson's Ratio(ν) | 0.2800 | - | — | ||
Shear Modulus(G)2 entries | 30.23 | GPa | — | ||
| ↳ | 33.98 | 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) | 4.997 | kg/m³ | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 0.9120 | eV | — | ||
Dielectric Constant (Relative Permittivity)(εr)2 entries | 38.73 | - | — | ||
| ↳ | 23.57 range 7.473–39.67median of 2 measurements | - | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Piezoelectric Modulus(eij) | 0.000 | C/m² | — | ||
Seebeck Coefficient(S) | -112 | 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) | -2.104 | eV/atom | — |
Verified Unverified Low confidence (<80%) Link to source
Regulatory Screening
Environmental
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.