1. high temperature resistance glass can work under 1200°C continuously,and in short time can even work under 1450°C, its softening point is 1650°C,and the melting point is 1650-1800°C. 2.Corrosion resistant, Except hydrofluoric acid, Quartz Plate Of Optical Grade do not react with any acid and base except hydrofluoric acid.the stability is 30 times of the ceramic,and 150 times of stainless steel . 3.Excellent thermal shock stability 4.High transmission to 85% 5.Electric insulation ,it is 10000 times of usual glass.
Features
Density
2.2x103 kg/m3
Dielectric Properties
(20°C and 1 MHz)
Hardness
5.5 - 6.5 Mohs' Scale 570 KHN 100
Constant
3.75
Design Tensile Strength
4.8x107 Pa (N/m2) (7000 psi)
Strength
5x107 V/m
Design Compressive Strength
Greater than 1.1 x l09 Pa (160,000 psi)
Loss Factor
Less than 4x10-4
Bulk Modulus
3.7x1010 Pa (5.3x106 psi)
Dissipation Factor
Less than 1x10-4
Rigidity Modulus
3.1x1010 Pa (4.5x106 psi)
Index of Refraction
1.4585
Young's Modulus
72GPa (10.5x106 psi)
Constringence (Nu)
67.56
Poisson's Ratio
0.17
Velocity of Sound-Shear Wave
3.75x103 m/s
Coefficient of Thermal Expansion
5.5x10 -7 cm/cm·°C (20°C-320°C)
Velocity of Sound/Compression Wave
5.90x103 m/s
Thermal Conductivity
1.4 W/m·°C
Sonic Attenuation
Less than 11 db/m MHz
Specific Heat
670 J/kg·°C
Permeability Constants(700°C)
(cm3 mm/cm2 sec cm of Hg)
Softening Point
1683°C
Helium
210x10-10
Annealing Point
1215°C
Hydrogen
21x10-10
Strain Point
1120 °C
Deuterium
17x10-10
Electrical Resistivity
7x107 ohm cm (350°C)
Neon
9.5x10-10
Parameter/ Value
JGS1
JGS2
JGS3
Maximum Size
<φ200mm
<φ300mm
<φ200mm
Transmission Range (Medium transmission ratio)
0.17~2.10um (Tavg>90%)
0.26~2.10um (Tavg>85%)
0.185~3.52um (Tavg-85%)
OH- content
1200ppm
150ppm
5ppm
Fluorescence (ex254nm)
Virtually Free
Strong V-B
Strong V-B
Impurity Content
5ppm
20-40ppm
40-50ppm
Birefringence Constant
2-4nm/cm
4-6nm/cm
4-10nm/cm
Melting Method
Synthetic CVD
Oxy-Hydrogen melting
Electrical melting
Applications
Laser substrate: window, lens, prism, mirror
Semiconductor and high temperature window
IR & UV substrate
Production Flow
Application
This product is mainly used in electric light source, electrical appliances (electric), semiconductor, optical communications, military industry, metallurgy, building materials, chemical, machinery, electricity, environmental protection and other fields.
Certifications
Our Company
Services
1. After-sales service We promise that we can change or Refund the products if there is any quality problem. 2. Sample: We would like to give suitable suggestions about the HM crystal singing bowl, as required within 2-5days, are usually delivered by EMS/DHL or SF-express. So, you can receive them within 4-10days. 3. OEM: Accept OEM orders