CaS
ceramic· CaS
Calcium sulfide (CaS) is an inorganic ceramic compound belonging to the sulfide ceramics family, characterized by ionic bonding between calcium and sulfur atoms. Historically used in specialized optical and photonic applications due to its transparency in the infrared spectrum, CaS has seen limited but persistent industrial interest in phosphor materials, thermal imaging windows, and niche optoelectronic devices. Modern research explores CaS primarily as a model compound for understanding sulfide ceramic properties and as a potential material for high-temperature structural applications, though it remains less common than oxide ceramics in mainstream engineering due to chemical sensitivity and processing challenges.
infrared optics and windowsphosphor and luminescent coatingsthermal imaging componentsresearch ceramicsrefractory applications
Compliance & Regulations
?Conflict Free?RoHS?REACH?TSCA?Prop 65
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)2 entries | 57.07 | GPa | — | ||
| ↳ | 61.57 | GPa | — | ||
Poisson's Ratio(ν) | 0.2200 | - | — | ||
Shear Modulus(G)2 entries | 39.22 | GPa | — | ||
| ↳ | 43.96 | 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) | 2.611 | kg/m³ | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg)2 entries | 6.000 | eV | — | ||
| ↳ | 2.347 | eV | — | ||
Dielectric Constant (Relative Permittivity)(εr)3 entries | 12.09 | - | — | ||
| ↳ | 11.53 | - | — | ||
| ↳ | 8.442 range 5.219–11.66median of 2 measurements | - | — | ||
Electronic Dielectric Tensor(ε∞) | Matrix (redacted) | - | — | ||
Total Dielectric Tensor(ε) | Matrix (redacted) | - | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Piezoelectric Modulus(eij) | 0.000 | C/m² | — | ||
Seebeck Coefficient(S) | -199.4 | 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 entries | -2.452 | eV/atom | — | ||
| ↳ | -2.382 | eV/atom | — |
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
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.