The chemical formula of lithium tantalate is LiTaO3. Colorless or light yellow crystals. It is a ferroelectric crystal with excellent electro-optical, piezoelectric, electrical and pyroelectric properties. Use the pulling method to grow. It is used as a Q-switch in laser technology, as a pyroelectric detector in infrared technology, and can also be used to make filters and resonators.
| Main performance parameters | |||
| Material purity | >99.995% | ||
| Crystal structure | Oblique hexahedron, space group:C63vR3C | ||
| Lattice constant | a=5.154Å c=13.783 Å | ||
| Melting point (℃) | 1650 | ||
| Curie temperature | 665±5℃ | ||
| Density | 7.45（g/cm3） | ||
| Hardness | 5.5~6（mohs） | ||
| Color | Colorless or light yellow | ||
| Refractive index | no=2.176 ne=2.180 （633nm） | ||
| Primary electro-optic coefficient | r12=7.0×10-12m/V， | ||
| Electromechanical coupling coefficient | R15≥0.3 | ||
| Resistivity | 1015w.m | ||
| Intensity of spontaneous polarization | 50×10-6C/cm2 | ||
| Pyroelectric coefficient | 2.3×10-7 C/cm2/K | ||
| Dielectric constant | es11/eo:39~43 es33/eo:42~43 | ||
| Thermal expansion coefficient | aa=1.61×10-6/k，ac=4.1×10-6/k | ||
| standard product | |||
| Name | Product | Direction | Standard size |
| LTB | Crystal rod | X、Y、Z±1º | Ø2″×50mm |
| LTW | Epitaxial polishing wafer Double throw Ra<10Å | X, Y, Z or Y rotation with or without positioning edge | 10×10×0.5mm |
| Package | Class 100 clean bag, Class 1000 super clean room | ||
