Description
Lead
glass is primarily composed of silica and lead. It has moderate
electrical resistance, density, refractive index and x-ray
absorption rate.
The
softening point of lead glass also tends to lower than that of soda
glass. It exhibits moderate durability and is easily
worked.
Mainly used as stem and exhaust tube
of fluorescent and incandescent lamp. It is also used for neon
signs, pilot lamp, starter lamps and electron gun for TV
braun.
Lead free glass tube
1.
Property
a. Softening
point: **5±*0℃
b. When
the mass resistance is **0MΩ.cm, temperature of
TK***0≥**0℃
c. Density:
2.*3±0.*5g/cm3
d. Strain
point: **5℃
e. Annealing
point: **5±*0℃
f. Working
point: ***0℃
g. Melting
point: ***0℃
h. Heat
stability: ≥**0℃
i. Specific
gravity: 2.*2g/cn3 (at *0℃)
2. Chemical
Composition
a. SiO2:
*8%
b. Al2O3:
3.4%
c. Na2O:
7%
d. K2O:
5%
e. BaO:
9%
