| 1. Character |
Grade : Clear 1
Chemical analysis : (typical content )
Vitreous SiO2 99.9% |
|
Element |
Al |
B |
Ca |
Cr |
Cu |
Fe |
K |
Li |
Mg |
Na |
|
ppm |
20 |
0.1 |
1.2 |
0.05 |
0.05 |
1.0 |
2.0 |
1.0 |
0.9 |
3.0 |
|
|
OH content: 150 ppm |
|
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|
|
Size range available£º(Length : 1000mm ) |
| Diameter D |
tolerance |
Airline Length |
Airline Number |
| mm |
mm |
mm |
N / 1000mm |
| 3 - 5 |
*0.3 |
* 4 |
* 3 |
| 6 - 8 |
*0.3 |
* 5 |
* 4 |
| 9 - 12 |
*0.3 |
* 6 |
* 6 |
| 13 - 15 |
*0.3 |
* 7 |
* 8 |
| 16 - 20 |
*0.5 |
* 8 |
* 10 |
| 21 - 30 |
*1.0 |
* 9 |
* 20 |
|
|
Max.Bow 0.2 % Max.Ovality 1 % |
|
| Price £º 5 - 20 $/kg |
| Inclusions
content |
| Number per
100cm3 |
Diameter 0.1 -
0.2mm less than 10
greater than 0.2 mm 0 |
Thermal
properties Strain temperature 1075 *C
Annealing temperature 1180 *C
Softening temperature 1730 *C
Working range 1700 -2100 *C |
| |
|
| 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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