Potassium niobate (KNbO₃) is a ferroelectric ceramic compound with semiconductor properties, belonging to the perovskite oxide family. It is primarily investigated for photonic and electro-optic applications due to its nonlinear optical response and ferroelectric switching behavior. KNbO₃ appears in research and emerging commercial contexts for frequency conversion, optical modulation, and integrated photonic devices, where engineers value its ability to manipulate light properties through applied electric fields—a capability that distinguishes it from conventional passive optical materials.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)2 entries | 128.6 | GPa | DFT · OptB88vdW | ||
| ↳ | 103.6 range 102.6–104.6median of 2 measurements | GPa | DFT | ||
Poisson's Ratio(ν) | 0.3400 | - | DFT · OptB88vdW | ||
Shear Modulus(G)2 entries | 57.16 | GPa | DFT · OptB88vdW | ||
| ↳ | 54.45 range 40.66–68.24median of 2 measurements | GPa | DFT |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 4.443 | kg/m³ | DFT · OptB88vdW |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg)4 entries | 3.500 | eV | DFT · GLLB-SC | ||
| ↳ | 1.714 | eV | DFT · PBE | ||
| ↳ | 2.089 | eV | DFT · OptB88vdW | ||
| ↳ | 2.596 | eV | DFT · TBmBJ | ||
Dielectric Constant (Relative Permittivity)(εr)3 entries | 57.67 | - | DFT · OptB88vdW | ||
| ↳ | 7.940 | - | DFT · PBE | ||
| ↳ | 25.74 range 5.544–45.94median of 2 measurements | - | DFT · PBEsol | ||
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries | 5.916 | - | DFT · OptB88vdW | ||
| ↳ | 5.366 | - | DFT · TBmBJ | ||
Electronic Dielectric Tensor(ε∞) | Matrix (redacted) | - | DFT · PBE | ||
Total Dielectric Tensor(ε) | Matrix (redacted) | - | DFT · PBE | ||
Electron Effective Mass(m*e) | 1.073 | me | DFT · OptB88vdW · 27°C | ||
Hole Effective Mass(m*h) | 2.290 | me | DFT · OptB88vdW · 27°C | ||
Magnetic Moment(μB)3 entries | 0.000 | μB | DFT | ||
| ↳ | -6.451e-7 | μB | DFT | ||
| ↳ | 0.000 | µB | DFT · OptB88vdW | ||
Piezoelectric Modulus(eij)2 entries | 0.2790 | C/m² | DFT · OptB88vdW | ||
| ↳ | 3.258 | C/m² | DFT · PBE | ||
Piezoelectric Stress Tensor(eij) | Matrix (redacted) | C/m² | DFT · PBE | ||
Thermoelectric Power Factor(PF)2 entries | 0.00300 | W/(m·K²) | DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C | ||
| ↳ | 0.00240 | W/(m·K²) | DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C | ||
Seebeck Coefficient(S)2 entries | -313.6 | μV/K | DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C | ||
| ↳ | 435.1 | μV/K | DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C | ||
Spectroscopic Limited Maximum Efficiency (SLME)(SLME) | 10.79 | % | DFT · TBmBJ |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.000 | eV/atom | DFT · OptB88vdW | ||
Formation Energy(ΔHf)3 entries | -2.697 | eV/atom | DFT | ||
| ↳ | -0.4200 | eV/atom | DFT | ||
| ↳ | -2.679 | eV/atom | DFT · OptB88vdW |
Reference data from cited sources. Not verified or certified by MatWorld Inc. Verify against the source before use in design. Terms: engineering data