Jinzhou Seahope New Material Co., Ltd tel: +86-416-7908037
Flame fusion quartz glass
Flame fusion quartz glass is a transparent quartz weight made by hydrogen and oxygen flame melting high pure silica sand, and obtains quartz ingots with better specification and better uniformity, and then obtains better stress by precision annealing (≤3nm/cm). It has the feature of low thermal expansion coefficient (5.5 × 10-7), good thermal stability and strong physical and mechanical properties, and it is mainly used for large and medium-sized speculum in harsh environments.
Impurities
|
Impurity content ppm |
||||||||||||||
|
product |
Al |
Fe |
Ca |
Mg |
Ti |
Cu |
Mn |
Ni |
Co |
B |
K |
Na |
Li |
OH |
|
HP3002 |
12.14 |
0.20 |
0.40 |
0.05 |
1.20 |
0.02 |
0.42 |
— |
— |
0.10 |
0.60 |
0.80 |
0.40 |
～200 |
Relation with viscosity & temperature
|
|
Viscosity（lgη，Po） |
temperature（℃） |
|
Strain point |
14.5 |
1025±25 |
|
Annealing point |
13 |
1120±25 |
|
Softening Point |
7.6 |
1600±40 |
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