Feature
This glass material possesses excellent thermal resistance, enabling it to withstand drastic temperature changes and extreme heat without cracking or deformation, which guarantees stable and safe operation for high-heat lighting equipment. It delivers superior mechanical strength and breakage resistance for long-term service durability. With excellent chemical stability, it resists most acids and daily chemical corrosion, effectively avoiding material deterioration. Its high optical clarity ensures high light transmittance, delivering uniform and bright lighting output with minimal light loss.
Application
Borosilicate glass tubes are widely applied in infrared lamps and heating lighting equipment, as well as various halogen lamp products that require high temperature resistance. They are also commonly used in high-temperature resistant laboratory glassware and professional high-demand optical and thermal appliances.
Available Size
Parameter |
Value |
Outer Diameter |
4.5~31.5mm |
Wall Thickness |
0.5~8.0mm |
Length |
≤1.8m |
OEM is acceptable
Chemical Properties
Composition |
SiO2 |
B2O3 |
R2O |
Al2O3 |
Fe2O3 |
Weight (%) |
80.3 |
13.0 |
4.1 |
3.4 |
0.035 |
*For reference only
Physical Properties
Property |
Value |
Linear Expansion Coefficient (30~380℃) |
(3.3±0.1)×10-6/℃ |
Density |
2.23±0.02g/cm3 |
Softening Point |
820±10℃ |
Viscosity Point |
510±10℃ |
Annealing Point |
560±10℃ |
Heat Stability |
≥240℃ |
Thermal Conductivity (20~100℃) |
1.2W/m℃ |
*For reference only