Silicon dioxide (SiO₂) is an inorganic ceramic compound that exists in both crystalline forms (quartz, cristobalite) and amorphous forms (silica glass). It is one of the most abundant and versatile ceramic materials, used across industries ranging from construction and electronics to optics and chemical processing. Engineers select SiO₂ for applications requiring chemical inertness, thermal stability, optical transparency, or dielectric properties, and it serves as a foundational material for advanced composites, coatings, and refractories where cost-effectiveness and processability are critical alongside moderate mechanical demands.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)3 entries | 3,761.3 | ksi | — | ||
| ↳ | 1,866.9 | ksi | — | ||
| ↳ | 14,274.6 | ksi | — | ||
Elastic Compliance Tensor(Sij) | Matrix (redacted) | 1/GPa | — | ||
Elastic Anisotropy(AU) | 0.9860 | - | — | ||
Elastic Stiffness Tensor(Cij) | Matrix (redacted) | ksi | — | ||
Poisson's Ratio(ν)2 entries | 0.06000 | - | — | ||
| ↳ | 0.1600 | - | — | ||
Shear Modulus(G)3 entries | 4,688.2 | ksi | — | ||
| ↳ | 6,240.4 | ksi | — | ||
| ↳ | 11,952.6 | ksi | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Thermal Conductivity(k) | 0.9245 | BTU/(hr·ft·°F) | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 0.07724 | lb/in³ | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 5.621 | eV | — | ||
Dielectric Constant (Relative Permittivity)(εr)3 entries | 4.208 | - | — | ||
| ↳ | 3.052 range 2.211–3.894median of 2 measurements | - | — | ||
| ↳ | 3.890 range 3.740–4.040median of 2 measurements | - | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Piezoelectric Modulus(eij)2 entries | 0.04423 | C/m² | — | ||
| ↳ | 0.2604 | C/m² | — | ||
Piezoelectric Stress Tensor(eij) | Matrix (redacted) | C/m² | — | ||
Seebeck Coefficient(S) | -153.8 | µV/K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.03120 | eV/atom | — | ||
Formation Energy(ΔHf)2 entries | -3.138 | eV/atom | — | ||
| ↳ | -2.870 | eV/atom | — |