UQG Optics

IR FUSED QUARTZ

MECHANICAL PROPERTIES
Density g/cm3 2.203
Mohs hardness 5.5-6.5
Micro hardness N/mm2 8600-9800
Knoop hardness N/mm2 5800-6200
Modulus of elasticity (at 20°C) N/mm2 7.0.10-4
Moduluas of torsion N/mm2 3.1.10-4
Poisson’s ratio 0.17
Compressive strength N/mm2 1150
Tensile strength N/mm2 50
Bending strength N/mm2 67
Torsional strength N/mm2 30
Sound velocity N/mm2 5720
THERMAL PROPERTIES
Softening temperature °C 1730
Annealing temperature °C 1180
Strain temperature °C 1075
Max. working temperature - continuous 1150
  - short term 1300
Mean specific heat J/kg . K  
0-100°C 772
0-500°C 964
0-900°C 1052

Heat conductivity W/m . K 20°C
20°C 1.38
100°C 1.46
200°C 1.55
300°C 1.67
400°C 1.84
950°C 2.68

Mean termal expansion coefficient K-1
0-100°C 5.1·0 -7
0-200°C 5.8·0 -7
0-300°C 5.9·0 -7
0-600°C 5.4·0 -7
0.900°C 4.8·0 -7
-50 - 0°C 2.7·0 -7
0- -60°C 0
ELECTRICAL DATA OF QUARTZ GLASS
Resistivity inΩ · m
20°C 1016
400°C 108
800°C 6.3·104
1200°C 1.3·103

Dielectric strength in kV/mm (sample thickness ≥ 5mm)
20°C 25-40
500°C 4-5

Dielectric loss angle (tg)
1kHz 0.0005
1-1000MHz 0.0001
3·104 MHz 0.0004

Dielectric constant (ε)
20°C 0.1 MHz 3.70
23°C 9·102 MHz 3.77
23°C 3·104 MHz 3.81

TYPICAL TRACE IMPURITIES IN QUARTZ GLASS
AI= Aluminium 20
Ca = Calcium 1
Cr = Chromium 0.1
Cu = Copper 0.1
Fe = Iron 0.8
K = Potassium 0.8
Li = Lithium 1
Mg = Magnesium 0.1
Na = Sodium 1
Ti = Titamium 1


WHILE EVERY ATTEMPT HAS BEEN MADE TO VERIFY THE SOURCE OF THE INFORMATION, NO RESPONSIBILITY IS ACCEPTED FOR ACCURACY OF DATA.