Strstrontium titanate (SrTiO3) is one of the most widely used excellent high temperature superconducting single crystal substrates. It matches well the lattice of high temperature superconducting materials such as YBa2Cu3O7, twinning less structure and has excellent physical and mechanical properties. A variety of high-temperature superconducting thin films (Y-line, Bi-line, La-line, etc.) made using various membrane making techniques (such as magnetic sputtering, pulse laser deposition, laser molecular beam epitaxy, etc.) can obtain TCO 90 ° K, JCO 106A / cm2.SrTiO3 is also the preferred single crystal material for high temperature superconducting junction technology (using two-crystal substrate or step substrate) and substrate stepping (oblique cut at a specific angle).
| Main performance parameters | |
| Crystal Structure | Cubic |
| Growth method | Verneuil's method ; floating zone method |
| Lattice constant | a=3.905Å |
| Melting poing（℃） | 2060 |
| Density | 5.122（g/cm3） |
| Mohs hardness | 6-6.5 |
| Thermal expansivity | 9.4×10-6（/℃） |
| Dielectric constant | ε=5.20 |
| Chemical stability | Insoluble in water |
| Loss tangent | ~5×10-4（300k） ~3×10-4（77k） |
| Color | Transparent (sometimes slightly yellow according to the annealing state) |
| Dimension | 5x5mm、10×5mm、10×10mm、20×20mm,Dia25.4mm,Dia30mm, Special orientation and size of the substrate can be customized according to the customer needs |
| Thickness | 0.5mm、1.0mm |
| Dimension tolerance | <±0.1mm |
| Thickness tolerance | <±0.05mm |
| Polishing | One side or two sides |
| Orientation | <100>、<110>、<111> |
| Orientation tolerance | ±0.5° |
| Falt rientation tolerance | 2°（Special requirements can be within 1 °） |
| Packing | Class 100 clean bag, Class 1000 clean room |
