Magnesium oxide (MgO) is an ionic ceramic compound with a rock-salt crystal structure, valued for its combination of high-temperature stability, chemical inertness, and thermal properties. It is widely used in refractory applications—particularly in furnace linings, crucibles, and kiln construction for steelmaking, cement production, and metallurgical processing—where it resists thermal shock and maintains structural integrity at extreme temperatures. Beyond refractories, MgO serves in specialized optical windows, electrical insulators, and as a sintering aid in advanced ceramics; engineers select it over alternatives where thermal stability, low chemical reactivity, and dimensional consistency under heat cycling are critical performance drivers.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)3 entries | 21,972.8 | ksi | — | ||
| ↳ | 21,972.8 | ksi | — | ||
| ↳ | 17,459.6 | ksi | — | ||
Elastic Compliance Tensor(Sij) | Matrix (redacted) | 1/GPa | — | ||
Elastic Anisotropy(AU) | 0.2315 | - | — | ||
Elastic Stiffness Tensor(Cij) | Matrix (redacted) | ksi | — | ||
Poisson's Ratio(ν)2 entries | 0.1893 | - | — | ||
| ↳ | 0.3200 | - | — | ||
Shear Modulus(G)3 entries | 17,218 | ksi | — | ||
| ↳ | 17,218 | ksi | — | ||
| ↳ | 7,288.1 | ksi | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Thermal Conductivity(k) | 9.245 range 3.756–23.11median of 5 measurements | BTU/(hr·ft·°F) | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 0.09989 | lb/in³ | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg)2 entries | 7.780 | eV | — | ||
| ↳ | 3.857 | eV | — | ||
Dielectric Constant (Relative Permittivity)(εr) | 6.212 | - | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Piezoelectric Modulus(eij)2 entries | 2.257 | C/m² | — | ||
| ↳ | 0.1931 | C/m² | — | ||
Piezoelectric Stress Tensor(eij) | Matrix (redacted) | C/m² | — | ||
Seebeck Coefficient(S) | -81.44 | µV/K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.1438 | eV/atom | — | ||
Formation Energy(ΔHf)2 entries | -3.118 | eV/atom | — | ||
| ↳ | -2.891 | eV/atom | — |