Feature
Free of lead content, this glass avoids
lead‑fume hazards during thermal processing and simplifies waste disposal. It
will not develop black surface deposits under flame working, so fabricators may
adopt more flexible flame conditions for heating and shaping. It delivers good
hardness and visible‑light clarity well‑suited for lighting‑related end‑uses.
Application
This glass tube is widely used for flare tubes and exhaust tubes for incandescent and fluorescent lighting devices, and it also finds extensive application within neon‑sign production.
Available Size
Parameter |
Value |
Outer Diameter |
2~26mm |
Wall Thickness |
0.4~1.7mm |
Length |
0.85m, 1.25m, 1.40m, 1.60m and 1.70m |
OEM is acceptable
Chemical Properties
Composition |
SiO2 |
BaO |
Na2O |
K2O |
Al2O3 |
SrO |
CaO |
MgO |
Li2O |
Fe2O3 |
Weight (%) |
67.5±0.5 |
9.0±0.5 |
7.5±0.5 |
4.95±0.55 |
4.25±1.25 |
3.0±0.5 |
2.0±0.5 |
1.5±0.5 |
1.5±0.5 |
0.01~0.05 |
*For reference only
Physical Properties
Property |
Value |
Linear Expansion Coefficient (30~380℃) |
(9.10±0.15)×10-6/℃ |
Density |
2.62g/cm3 |
Softening Point |
675±5℃ |
Annealing Point |
485±5℃ |
Strain Point |
475±10℃ |
Working Point |
1020±10℃ |
*For reference only