SrTiO3 Crystal Substrate
Strontium titanate SrTiO3 has a typical perovskite structure and it is widely used as a substrate for ferroelectric and superconductor thin films. SrTiO3 is the first choice for high-temperature superconducting junction technology single crystal material, because the lattice constant of SrTiO3 is similar to Y-Ba-Cu-O system (a=3.89Å). In applied research, it is placed in important part for Josephson element and SQUID.
Parameter
| Composition | SrTiO3 |
| Crystal system | Cubic |
| Space group | Pm3m (Perovskite) |
| Lattice constant | a=0.3905nm |
| Melting point | 2080°C |
| Growth method | Verneuil method |
| Density | 5.122g/cm3 (20°C) |
| Dielectric constant | 310 (27°C,1 MHz) |
| Thermal expansion coefficient | 11.1×10-6/°C (r.t.～1000°C) |
| Phase transition | 110K (tetragonal⇔ cubic) |
| Refractive index | 2.407 (at 589nm) |
| Dielectric constant | ~300 |
| Chemical stability | Insoluble in water |
| Loss tangent | ~ 5 x 10-4(300k) , ~ 3 x 10-4(77k) |
| Product Name | SrTiO3 substrate |
| Orientation | <100> ±0.5° <110> ±0.5° <111> ±0.5° Or other off-angle |
| Standard Size | 10x10mm 10x5mm 5x5mm 3x3mm 20x20mm φ1″ x 0.5mm Or others |
| Thickness | 0.1mm 0.2mm 0.5mm 1.0mm 2.0mm Or others |
| Polishing | Fine ground Single side polished Double side polished Roughness: Ra<5A(0.5nm) |
Feature
Application
Reference
News
Feature
- A Perovskite crystal structure
- Trontium Titanate (SrTiO3) and Y-Ba-Cu-O system (a = 3.89 A) have similar values in the lattice constant
- No twin structure
Application
- As special optical windows and as high quality sputtering target
- As substrate material for the epitaxial film of HTS and many oxides
Reference
News
SrTiO3 Crystal Substrate have supplied
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