Nb:SrTiO3
Niobium-doped strontium titanate has a similar structure to strontium titanate single crystal. At present, we can provide Nb:SrTiO3 single crystal substrates with Niobium doping concentration of: 0.05%, 0.1%，0.5% and 0.7%.
| Main performance parameters | |
| Crystal structure | Cube |
| Crystal growth method | Verneuil |
| Lattice constant | a=3.905Å |
| Nb concentration wt% | 0.05%, 0.1%，0.5% and 0.7% |
| Melting point（℃） | 2080 |
| Density（g/cm3） | 5.122（g/cm3） |
| Hardness | 6-6.5（mohs） |
| Coefficient of thermal expansion | 9.4×10-6/K |
| Dielectric constant | ε=5.20 |
| Chemical stability | Insoluble in water |
| Secant loss | ~5×10E-4（300k） ~3×10E-4（77k） |
| Size | 5×5m、10×5m、10×10mm、15×15mm、20×10mm Can be customized according to customer needs, special direction and size of the substrate. |
| Thickness | 0.5mm、1.0mm |
| Dimensional tolerance | <±0.1mm |
| Thickness tolerance | <±0.05mm,Special requirements can be met<±0.005mm） |
| Polishing | Single-sided or double-sided |
| Orientationtolerance | ±0.5° |
| Flat orientation tolerance | 2°（Special requirements can reach within 1°） |
| Crystal orientation | <100>、<110>、<111> etc. |
| Package | Class 100 clean bag, Class 1000 super clean room |
