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JGS2 quartz plates & quartz discs
The most popular high purity (SiO2 over 99.99%) quartz glass window is made of material JGS2 in China,this material is made by flame fusing.It is widely used in semiconductor and solar industry,for making optical quartz glass parts such as slides,quartz lens,prism,observation window etc.Another two kind of quartz material is JGS1-far ultraviolet opticla quartz glass and JGS3-infrared optical quartz glass.
Quartz Basic Characteristics:

a.       The average thermal expansion coefficient at 0 ~ 1000 is 5.4 x 10-7/

b.      Recrystallization temperature: Initial temperature is about 1000, while the dirty surface will cool down the recrystallizaion temperature and speed up the recrystallization process

c.       Normal operating temperature:

          Continuous usage:    About 1050
          Non-continuous usage: About 1250

d.      Characteristic temperature:

          Strain temperature:         About 1075
          Anneal temperature:        About 1180℃

          Hot processing temperature:  About 1700~2100℃

Material: JGS2, equivalent to GE214,made by flame fused,small or none tiny gas bubbles,SiO2 over 99.99%,OH content around 120ppm,most common material for optical application,it's chemcial composition as below(only for reference):

Chemical Composition (Unit:ppm)
Al
Fe
Ca
Mg Ti Pb
Mn
Ni
Co
Cu
K
Na
Li
B
10-30
0.4-1 0.18-21
1.4
0.1 0.024
0.1
-
0.012
2
2 0.2 0.3

Spectral Transmission at 1.0mm Thickness:


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Address:D6-2-202,No.188, East Jian-she Rd.Xinpu,Lianyungang,China
PS CODE:222002 
TEL:+86-518-85863370  FAX:+86-518-81085246
Contact: Jake Song  M/P:13815669519 Website: www.lygquartz.com
Email: jakesong@lygquartz.com    
or     lannoquartz@gmail.com