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| Type: | Dia 2inch Thick 0.5mm Langasite Single Crystal LGS Substrate | Diameter: | 50.8mm |
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| Thickness: | 0.5mm/1mm | Ra: | <0.5nm |
| Material: | La3Ga5SiO14 | Growth Method: | Czochralski |
| Warranty:: | 1 Year | Color: | Faint Yellow |
| High Light: | Single Langasite Crystal,la3ga5sio14 LGS Substrate,0.5mm Langasite Crystal |
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Dia 2inch Thick 0.5mm Langasite Single Crystal LGS Substrate
Lanthanum gallium silicate ( La2Ga5SiO14 ) is a phenomenal invention. Though langasite was initially developed as a laser crystal, it revealed a remarkable combination of piezoelectric qualities, which opened up new opportunities to use the LGS crystal in radio frequency devices. The main applications of langasite crystals now is SAW filters and SAW resonators. Experts agree that LGS is the best choice for high-efficiency broad band frequency devices because it possesses exceptional frequency-temperature characteristics, a very high index of electromechanical coupling and unparalleled Q-factor.
Crystro's LGS crystal has High thermal stability,low equivalent series resistance ratio and electro-mechanical coupling coefficient is 3-4 times than quartz.
Main Properties:
| Point group | 32 |
| Airborne group | P32I |
| specific resistance | 4.0×1012Ω/cm-1 |
| Thickness | 0.13-0.5mm |
| Diameter | 50mm |
| Length | 90-100mm |
| Melting point | 1470℃ |
| Density | 5.67g/cm3 |
| Mohs hardness | 5.5 |
| Thermal expansion coefficient | aa=16×10-6/K, ac=4×10-6/K |
| Photo damage threshold | 670MV/cm2 |
| Cell Parameters | a=b=0.8162nm,c=0.5087nm |
| Dielectric constant | ε11=18.27 |
| ε33=55.26 | |
| Electro-optical coefficients | γ11=2.3×10-12m/V |
| γ33=1.8×10-12m/V | |
| Piezoelectric strain constant | d11=6.3 |
| (10-12)C/N | d14=-5.4 |
| Phase velocity,m/s | 2750～2850 |
| Electromechanical coupling coefficient, K[ %] | 0.28～0.46 |
| Solubility | None |
| Coefficient of thermal expansion | α11=5.15×10-6K-1 |
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α33=3.65×10-6K-1 |
Features:
High damage threshold
Good optical rotation
Can withstand high and low temperature changes
Stable physical and chemical properties
High electromechanical coupling coefficient (3 times of quartz)
Low equivalent series resistance
Applications:
electro-optic Q-switch
SAW device
BAW device
Sensor
High power high repetition rate all solid state laser
High and low temperature change laser
DOCUMENT:
LGS Cryatal.pdf
Contact Person: Ms. Wu
Tel: 86-18405657612
Fax: 86-0551-63840588
