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5mm x 5mm x 45mm LGS Single Crystal With Electrodes Bar
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.
Langasite crystal (La3Ga5SiO14,LGS), belonging to the space group
P321, point group 32, has been reported to be promising new
piezoelectric materials for fabrication of surface acoustic wave
(SAW) and bulk acoustic wave (BAW) devices. The devices made of
langasite crystal could be used at a high temperature up to 900℃
because of its high thermal stability.
Crystro's LGS wafer is grown by Czochralski method.Max diameter reach 60mm.Crytsro can custom size and cutting
direction accordding to customer's needs,Our standard size
including LGS Crystal bar: 3x3x20mm,4x4x50mm,5x5x45mm... LGS
Crystal wafer: D2inchx0.5mm,D50x0.5mm,40x40x0.5mm...Piezoelectric
crystal including LGS,LN,LT,BBO,DKDP are CRYSTRO's main prodcuts..
Main Properties:
Crystal Structure | rigonal system, group 33 a= 8.1783 c = 5.1014 |
Growth Method | Czochralski |
Hardness | 6.6 Moh's |
Density | 5.754 g/cm3 |
Melt Point | 1470 o C ( phase transition point: N/A) |
Thermal expansion (x10-6/ oC) | α 11: 5.10 α 33: 3.61 |
Acoustic velocity, SAW | 2400 ( m/sec ) |
Frequency constant, BAW | 1380 ( kHz/mm ) |
Piezoelectric coupling | K2 (%) BAW: 2.21 SAW: 0.3 |
Inclusions | N0 |
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