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.
Compliance & Regulations
| 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 | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 2.611 | kg/m³ | — |
| 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 | — |
| 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 | — |