issue date：2016-3-31 15:35:44 visit frequency：3069
Single Synthetic Crystal Quartz is grown by hydrothermal method in autoclaves. It has trigonal crystal structure with right-handed or left-handed modification. Quartz crystals have low stress birefringence and high refractive index homogeneity. The optical transmission range of crystal quartz is 0.2-2.5microns. Due to its piezoelectric properties, low thermal expansion, good mechanical parameters and excellent optical characteristics, crystal quartz is widely used in electronics, precision and laser optics, fiber communications, X-ray optics, pressure sensors and etc.
Physical and Optical Properties
|
Transmission Range |
0.150-4.0µm |
|
Refractive Index |
no=1.5350, ne=1.5438@1µm |
|
Density |
2.65 g/cm3 |
|
Melting Point |
1710°C |
|
Molecular Weight |
60.06 |
|
Thermal_Conductivity |
|| C: 11.7 W/(m·K) @ 20°C; ⊥C: 6.5 |
|
Specific Heat |
744 J/(kg·K) |
|
Thermal Expansion |
|| C: 7.97 x 10-6/°C ; ⊥C: 13.37 x 10-6 /°C @ 0°-80°C |
|
Hardness (Mohs) |
7 |
|
Young`s Modulus |
|| C: 97; ⊥C: 76.5 GPa @ 25°C |
|
Elastic Coefficient |
C11 = 86.6; C12 = 6.7; C13 = 12.4; C14 = 17.8; C33= 106.4; C44 = 58 GPa |
|
Dielectric Constant |
|| C: 4.27@30MHz@25°C; ⊥C: 4.34 |
|
Solubility in Water |
insoluble |
|
Type of Material |
Single crystal, synthetic |
|
Crystal Structure |
trigonal, point group 32, a=4.9138Å, c=5.4052Å |
Capabilities
|
Quartz Crystal |
|
|
Shape |
Circular, Square, Spherical |
|
Sizes |
3 to 150mm or custom |
|
Tolerant |
±0.2mm(General Precision), ±0.01(High Precision) |
|
Surface Quality |
60-40(General Precision), 20-10(High Precision) |
|
Surface Flatness |
λ/2(General Precision), λ/8(High Precision) |
|
Parallelism |
3 arc min(General Precision), 1 arc sec(High Precision) |
|
Clear Aperture |
>90% |
|
Centration |
3 arc min(General Precision), 30 arc sec(High Precision) |
|
Angles/Deviation |
+/-3 arc min(General Precision), +/-5 arc sec(High Precision) |
|
Bevels |
0.2–0.3mm x 45deg |
|
Coatings |
Uncoated, AR, HR, PR Coating, etc |