| 1. Character |
Grade : Clear 1
Chemical analysis : (typical content )
Vitreous SiO2 99.9% |
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Element |
Al |
B |
Ca |
Cr |
Cu |
Fe |
K |
Li |
Mg |
Na |
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ppm |
15 |
0.1 |
1.2 |
0.05 |
0.05 |
1.0 |
2.0 |
1.0 |
0.9 |
2.0 |
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OH content: 150 ppm |
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Size range available： |
Maximum diameter 250 mm.
Maximum thickness 150 mm.
Bubbles and inclusions content
Number per 100cm3
Diameter 0.1 - 0.2mm less than 18
0.2 - 0.5 mm less than 3
greater than 0.5 mm 0
Applications windows
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| Price ： 80 - 180 $/kg |
(diameter
180mm,thickness 12mm,polished: 90-180 $/piece )
Thermal properties Strain temperature 1075 degree Centigrade
Annealing temperature 1180 degree Centigrade
Softening temperature 1730 degree Centigrade
Working range 1700 -2100 degree Centigrade |
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| Mechanical properties |
Rigidity modulus 3.2x104 MPa
Density 2.2 g/cm2
Young`s modulus 7.4x104MPa
compressive strength 2x104 MPa
Tensile strength 70 MPa
Shear strength 70 MPa
Thermal expansion coefficient 0.5x10-6 /0C |
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