Calcium oxide (CaO), commonly known as quicklime, is an inorganic ceramic compound formed by the calcination of limestone. It is a highly reactive alkaline oxide widely used in construction, metallurgy, environmental treatment, and chemical processing industries. CaO is valued for its strong cementitious properties, high-temperature stability, and ability to react with moisture and acidic compounds, making it essential in applications requiring thermal durability, chemical reactivity, or pH control.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)3 entries | 105.0 | GPa | — | ||
| ↳ | 105.0 | GPa | — | ||
| ↳ | 113.3 | GPa | — | ||
Elastic Compliance Tensor(Sij) | Matrix (redacted) | 1/GPa | — | ||
Elastic Anisotropy(AU) | 0.00178 | - | — | ||
Elastic Stiffness Tensor(Cij) | Matrix (redacted) | Pa | — | ||
Poisson's Ratio(ν)2 entries | 0.2141 | - | — | ||
| ↳ | 0.2200 | - | — | ||
Shear Modulus(G)3 entries | 74.17 | GPa | — | ||
| ↳ | 74.17 | GPa | — | ||
| ↳ | 79.07 | GPa | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Thermal Conductivity(k) | 15.00 | W/(m·K) | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 3.334 | kg/m³ | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg)2 entries | 6.970 | eV | — | ||
| ↳ | 3.645 | eV | — | ||
Dielectric Constant (Relative Permittivity)(εr)2 entries | 14.85 | - | — | ||
| ↳ | 9.795 range 3.843–15.75median of 2 measurements | - | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Piezoelectric Modulus(eij) | 0.000 | C/m² | — | ||
Seebeck Coefficient(S) | -220.8 | µV/K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.01170 | eV/atom | — | ||
Formation Energy(ΔHf)2 entries | -3.290 | eV/atom | — | ||
| ↳ | -3.261 | eV/atom | — |