Product Description
Lanthanum gallium silicate (LGS) crystal has broad prospects in the manufacturing of surface acoustic wave (SAW) and bulk acoustic wave (BAW) devices and is a new type of piezoelectric material. Meanwhile, LGS crystal can be used to make electro-optic Q-switches. Devices made of LGS crystal have high thermal stability.
Main Advantages:
High thermal stability
Low equivalent series resistance rate
The electromechanical coupling coefficient is 3 to 4 times that of quartz.
Typical applications:
Electro-optic Q-switch
Surface acoustic wave filter
Bulk acoustic wave filters, resonators
gyroscopes, etc.
Material Properties
| Compound Formula | La3Ga5SiO14 |
| Crystal Structure | Trigonal System |
| Density | 5.754 g/cm3 |
| Melting Point | 1470℃ |
| Mohs Hardness | 6.6 |
| Relative Dielectric Constant | ε11/ε0=19.2；ε33/ε0=50.7 |
| Thermal Expansion Coefficient | α11=5.07×10-6/K；α33=3.60×10-6/K |
| Piezoelectric Constants | e11=0.43；e22=0.1039 |
Technical Parameter
Crystro Offers:
| Size specifications | Φ2 inches, Φ3 inches, 10mm×10mm×0.5mm, 20mm×20mm×0.5mm or customized by customers |
| Thickness tolerance | ±0.02mm |
| Cutting direction | X/Y/Z, (0, 138.5, 27) or customized, with an accuracy of ±0.2° |
| Parallelism | <30″ |
| Perpendicularity | <15′ |
| Flatness | <λ/10@633nm |
| Chamfer | <0.1mm@45° |
| Surface finish | 10/5 |
