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LGS is a kind of multifunctional crystal with excellent properties. The dielectric, elastic and piezoelectric constants of LGS crystal are obviously higher than those of quartz, and the electromechanical coupling coefficient is 2-3 times higher than that of quartz. LGS crystal can be used to manufacture surface acoustic wave (SAW) and bulk acoustic wave (BAW) devices. At the same time, LGS crystal can be used to make electro-optic Q-switch, and the effect is comparable to that of DKDP crystal. The devices made of LGS crystal have high thermal stability.
Chemical formula | La3Ga5SiO14 |
Crystal structure | Trigonal system |
Growth method | Czochralski |
Hardness | 6.6 Mohs |
Density | 5.754g/cm3 |
Melting point | 1470℃ |
Dielectric constant | ε11=18.27； ε33=55.26； |
Coefficient of thermal expansion | α11=5.15x10-6K-1 α33=3.65x10-6K-1 |
Electromechanical coupling coefficient K (%) | 0.28~0.46 |
Piezoelectric strain constant | d11=6.3; d14=-5.4 |
Diameter tolerance | +0/-0.05mm |
Length tolerance | +0.1mm |
Cutting direction | ±0.2° |
Parallelism | <30″ |
Perpendicularity | <15′ |
Flatness | <λ/10@633nm |
Chamfering | <0.1*45° |
Surface quality | 10/5 |
Note: Parameters above can be customized as required. | |
Contact: John Jay Woo
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