Chemical Compositions
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|
Elements |
SiO2 |
BaO |
CaO |
MgO |
Na2O |
K2O |
CoO |
Al2O3 |
|
% (Wt) |
69.5±1.0 |
5.0±0.3 |
5.5±0.5 |
3.5±0.3 |
12.5±0.5 |
4.0±0.3 |
0.28±0.01 |
＜1 |
Physical Properties
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|
Items |
Unit |
Index |
|
Linear Expansivity within 20～300℃: α x 10-7 |
1/℃ |
93.0±1.0 |
|
Softening Temperature |
℃ |
700±10 |
|
Heat Stability |
℃ |
≥15 |
|
Annealing Temperature (Upper Limit) |
℃ |
505±10 |
|
Annealing Temperature (Lower Limit) |
℃ |
400±10 |
|
Dielectric loss (6Hz 20℃) |
- |
≤15 |
|
Volume Resistance (100mΩ.cm) |
℃ |
≥215 |
|
Density |
g/cm3 |
2.557±0.015 |
|
Chemical stability of water resistance |
Grade |
IV |
Available sizes and colors
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Re: Colored Glass Tubes
(1) Available size
- Minimum size: OD Ф3.0mm, Wall thickness 0.4～0.6mm
- Maximum size: OD Ф35mm, Wall thickness 1.5～1.8mm
- Length: ±10mm (Not smoothly cut, not flame processed)
(2) Available color
- According to the RAL codes or Pantone codes provided by the Buyer.