LGS wafer-Deqing Jinghui Optics Components Co.,Ltd.
Langasite (La3Ga5SiO14) crystal wafer
Orientation | Y- cut; Rotated Y-cut on 1°….2° /-0,02° |
Diameter | 25.4/50.8/76.2/100± 0.3mm |
Orientation Flat(OF) | CustomizedPerpendicular to X± 0.2° |
Thickness | 1-0.08 /-0.0 |
Frequency | 2--20 MHz |
Frequency accuracy at 25°C | /- 1000ppm |
Surface | Double sides polishedS/D:20/10 |
TTV | ≤ 10um |
WARP | ≤ 25um |
Edge Beveling | Edge Rounding |
Forms | Bi-Plane parallel |
Customization acceptable
Basic materials characteristics
Crystal Structure | P321 (D23) |
Density | 5, |
Melting Point | 1475oC |
Mohs Hardness | 6,5 |
Dielectric constants: ε11/ε0, ε33/ε0 | 18,9;52,0 |
Coefficient of thermal expansion: α11, α33 | 5,11x 10-6/K ; 3,16x10-6/K |
Piezoelectric constants: e11, e14 | - 0,43; |
Electromechanical coupling coefficients: k12, k26 | 0,16; 0,134Nm-2 |
Elastic constants: c11, c33, c12, c13, c14, c44, c66 | 18,93; 26,24; 10,5; 9,53; 1,49; 5,38; 4,22*1010Nm-2 |
The possible applications
Langasite has excellent thermal, piezoelectric and dielectric properties and is resistant to chemical attack. Main applications include:
1. Surface Acoustic Wave Sensors for High Temperatures;
2.Balk Sensors for High Temperatures, Crystal Units and Filters;
3.Dielectric Wafer; Electrical Insulators;
4.Thin Film Deposition;
5.Transparent Electronic Substrate;
6.Superconductor Substrate
Langasite (La3Ga5SiO14) crystal wafer
