|
SiO2
Single crystal quartz wafer is widely used in wireless communication industries. Since its lower price, It is an excellent substrate for microwave filters.
Physical Property |
molecular formula
|
SiO2 |
Crystal Structure |
Hex. a=4.914 Å c=5.405 Å |
Density |
2.684g /cm3 |
Melt Point |
1610oC |
Specific heat |
0.18cal/gm |
Thermoelectric Constant |
1200mV/ oC@300oC |
Thermal conductivity |
0.0033 cal/cm/ oC |
Thermal expansion ( x10
-6/℃ ) |
a11 : 13.71 a33 :7.48 |
Index of Refraction
|
1.544 |
Hardness |
7.0Mohs |
Q value |
1.8 ×106 min |
Acoustic velocity, SAW |
3160（m/sec ） |
Frequency constant, BAW |
1661（ kHz/mm ） |
Piezoelectric coupling |
K2（%）BAW：0.65 SAW：0.14 |
Standard Size |
Size ：Dia.4＂，Dia. 3＂，Dia.2＂
20 X 20mm , 10 X 10 mm
Thickness
： 0.5 -1 mm
Special size and orientation are available upon request
|
Orientation |
X 、Y 、 Z
Cut
|
Orientation Accuracy |
±0.3o |
Polishing & Micro Roughness
|
Single or double sides polished Ra<5Å |
|
