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Light lead glass tube
Ingredients
Name of oxide |
SiO2 |
Al2O3 |
CaO |
PbO |
B2O3 |
K2O |
Na2O |
Assay % |
67±1 |
1±0.5 |
3.5±0.3 |
8±1 |
1±0.2 |
5.5±0.4 |
11±0.5 |
Properties
Index name |
Unit |
Index |
Coefficient of linear expansion round 20-300℃ α×10-7 |
1/℃ |
93±2 |
Softening point when viscosity is 107.6pa.s |
℃ |
660±10 |
Thermal stability |
℃ |
≥110 |
Temperature when volume resistivity is 100Mpa/cm(TK-100) |
℃ |
≥240 |
Density |
g/cm3 |
2.6±0.05 |
Waterproof chemical stability level |
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Ⅲ |
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