KTaO3
semiconductor· KTaO3
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.
ferroelectric devices and capacitorsphotocatalytic water splittingnonlinear optical modulatorshigh-frequency dielectric resonatorscryogenic sensor applicationsquantum material research
Compliance & Regulations
?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K) | 198.2 | GPa | — | ||
Poisson's Ratio(ν) | 0.2400 | - | — | ||
Shear Modulus(G) | 132.4 | GPa | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 6.854 | kg/m³ | — |
Verified Unverified Low confidence (<80%) Link to source
| 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 | — |
N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form / heat treatment / basis.
Verified Unverified Low confidence (<80%) Link to source
| 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 | — |
N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form / heat treatment / basis.
Verified Unverified Low confidence (<80%) Link to source
Regulatory Screening
Environmental
Export Control
RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.