KTaO₃ (potassium tantalate) is a perovskite ceramic semiconductor with a cubic crystal structure, belonging to the family of complex oxides used in advanced electronic and photonic devices. It is primarily investigated for applications requiring high permittivity, ferroelectric properties, and photocatalytic activity, making it valuable in research contexts for next-generation sensors, nonlinear optics, and environmental remediation rather than mature high-volume production. Engineers consider KTaO₃ when conventional ferroelectrics (like PZT or BaTiO₃) cannot meet performance requirements in extreme temperature environments or when tunable dielectric properties are needed for RF/microwave components.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K) | 198.2 | GPa | — | ||
Poisson's Ratio(ν) | 0.2400 | - | — | ||
Shear Modulus(G) | 132.4 | GPa | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 6.854 | kg/m³ | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg)4 entries | 3.500 | eV | — | ||
| ↳ | 2.324 | eV | — | ||
| ↳ | 4.400 | eV | — | ||
| ↳ | 2.228 | eV | — | ||
Dielectric Constant (Relative Permittivity)(εr)3 entries | 8.810 | - | — | ||
| ↳ | 385.9 | - | — | ||
| ↳ | 322.6 range 5.376–639.9median of 2 measurements | - | — | ||
Electronic Dielectric Tensor(ε∞) | Matrix (redacted) | - | — | ||
Total Dielectric Tensor(ε) | Matrix (redacted) | - | — | ||
Magnetic Moment(μB)3 entries | 0.000 | μB | — | ||
| ↳ | -0.000114 | μB | — | ||
| ↳ | 0.000 | µB | — | ||
Piezoelectric Modulus(eij) | 0.000 | C/m² | — | ||
Seebeck Coefficient(S) | -279.1 | µV/K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.000 | eV/atom | — | ||
Formation Energy(ΔHf)3 entries | -2.920 | eV/atom | — | ||
| ↳ | -0.6400 | eV/atom | — | ||
| ↳ | -2.918 | eV/atom | — |