LGS-Xiamen Jinwu New Materials Co.,LTD

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LGS

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LGS

Product Description：

Gallium silicate lanthanum crystal (LGS) is a kind of multifunctional crystal with excellent performance. The dielectric, elastic and piezoelectric constants of LGS crystal are obviously higher than those of quartz, and the electromechanical coupling coefficient of LGS crystal is 2-3 times that of quartz, which 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, the effect is comparable to that of DKDP crystal Q switch. The devices based on LGS crystal have high thermal stability.

Main Characteristic：

Good thermal stability

Low equivalent series resistance

Electromechanical coupling coefficient (2~3 times of quartz)

Chemical Formula	La₃Ga₅SiO₁₄
Crystalline Structure	Trigonal system
Growth Method	Czochralski
Rigidity	6.6Mohs
Density	5.754g/cmm³
Melting Point	1470℃
Dielectric Constant	ε11=18.27;ε33=55.26
Thermal Expansion Coefficient	α11=5.15×10-6k-1α33=3.65×10-6k-1
Electro-mechanical Coupling factor K(%)	0.28~0.46
Piezoelectric Strain Constant	d11=6.3;d14=-5.4

Diameter Tolerance	+0/-0.05mm
Length Tolerance	±0.1mm
Cut Direction	±0.2°
Depth of Parallelism	<30"
Side Of The Vertical	<15'
Flatness	<λ/10@633nm
Chamfer	<0.1*45°
Surface Finish	10/5