Feature
Lead glass tubes are essential components in various lighting technologies within the illumination industry, offering a unique combination of optical properties, durability, and radiation shielding capabilities.
- Lead Content: With a high lead oxide content, lead glass tubes exhibit excellent optical properties, including a high refractive index and exceptional light transmission, ensuring optimal illumination.
- Softness: The soft nature of lead glass tubes allows for easy shaping and bending during fabrication, enabling the creation of intricate lighting components.
- Density: Lead glass tubes have a density that enhances their durability and stability, ensuring long-lasting performance in lighting applications.
- Radiation Shielding: The high lead content provides effective radiation shielding, making lead glass tubes suitable for medical and industrial lighting applications requiring radiation protection.
Application
Lead glass tubes are used for flare and exhaust tubing in incandescent and fluorescent lighting products. It is also used extensively for neon signs.
- Fluorescent Tubes: Lead glass tubes are commonly used as the outer shell of fluorescent tubes, where their optical properties contribute to efficient light transmission and dispersion, ensuring uniform illumination.
- LED Encapsulation: In LED lighting systems, lead glass tubes are employed for encapsulating LED components, providing protection while allowing optimal light emission. The unique optical properties of lead glass enhance the performance and longevity of LED lighting solutions.
- Incandescent Bulbs: Lead glass tubes serve as protective housings for filaments in traditional incandescent bulbs, maintaining optical clarity and durability for reliable lighting solutions. The high refractive index of lead glass enhances light dispersion, contributing to the warm glow characteristic of incandescent lighting.
- Specialised Lighting Solutions: Lead glass tubes find applications in specialised lighting solutions such as ultraviolet (UV) lamps and phototherapy devices, where their unique optical properties are leveraged to achieve specific lighting requirements, including precise wavelength control and efficient light delivery.
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
Low Lead Glass Tube
Composition |
SiO2 |
PbO |
Na2O |
K2O |
CaO |
BaO |
B2O3 |
Al2O3 |
Fe2O3 |
Weight (%) |
65.5±1.0 |
11.0±1.0 |
9.5±0.4 |
4.0±0.4 |
3.8±0.4 |
2.5±0.3 |
1.2±0.2 |
1.0±0.2 |
≤0.2 |
*For reference only
Medium Lead Glass Tube
Composition |
SiO2 |
PbO |
Na2O |
K2O |
BaO |
Al2O3 |
B2O3 |
Fe2O3 |
Weight (%) |
63.0 |
20.5 |
8.8 |
2.9 |
2.1 |
0.85 |
0.8 |
0.12 |
*For reference only
High Lead Glass Tube
Composition |
SiO2 |
PbO |
K2O |
Na2O |
Al2O3 |
Weight (%) |
57.0 |
29.0±1.0 |
8.5±0.5 |
4.0±0.5 |
1.0~1.5 |
*For reference only
OEM is acceptable
Physical Properties
Low Lead Glass Tube
Property |
Value |
Linear Expansion Coefficient (30~380℃) |
(9.1±0.1)×10-6/℃ |
Density |
2.72g/cm3 |
Softening Point |
660±10℃ |
Annealing Point |
470±20℃ |
Working Point |
1020℃ |
Heat Stability |
≥110℃ |
Chemical Stability |
Hydrolytic Class III |
*For reference only
Medium Lead Glass Tube
Property |
Value |
Linear Expansion Coefficient (30~380℃) |
(9.05±0.10)×10-6/℃ |
Density |
2.85g/cm3 |
Softening Point |
630±10℃ |
Heat Stability |
≥122℃ |
Chemical Stability |
Hydrolytic Class IV |
*For reference only
High Lead Glass Tube
Property |
Value |
Linear Expansion Coefficient (30~380℃) |
9.40×10-6/℃ |
Density |
3.05g/cm3 |
Softening Point |
620℃ |
Annealing Point |
415±20℃ |
Strain Pont |
400℃ |
Electric Inductivity (1Mhz,25℃) |
6.8 |
X-ray Absorption Coefficient (cm at0.6Å) |
80min |
*For reference only
OEM is acceptable