Technical Data of the High Borosilicate Glass:
1. Chemical composition:
SiO2>78% B2O3>10%
2. Physical and Chemical Properties:
Coefficient of expansion | (3.3±0.1)×10-6/°C |
Density | 2.23±0.02 |
Water resistant | Grade 1 |
Acid resistance | Grade 1 |
Alkaline resistance | Grade 2 |
Softening point | 820±10°C |
Thermal shock performance | ≥125 |
Maximum working temperature | 450°C |
Tempered max. working temperature | 650°C |
3. Main Technical Parameters:
Melting point | 1680°C |
Forming temperature | 1260°C |
Softening temperature | 830°C |
Annealing temperature | 560°C
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