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.
1. Property
a. Coefficient
of expansion rate (*0℃***0℃):
*1±2x***7/K
b. Softening
point: **5±*0℃
c. When
the mass resistance is **0MΩ.cm, temperature of
TK***0≥**0℃
d. Density:
2.*3±0.*3g/cm3
e. Strain
point: **0℃
f. Annealing
point: **0℃
g. Working
point: ***0℃
h. Melting
point: ***0℃
i. Percentage
of lead: *1%
2. Chemical
Composition
a. SiO2:
*1.5%
b. B2O3:
1%
c. Al2O3:
1.2%
d. PbO:
****1%
e. Fe2O3:
0.1%
f. LizO:
0.2%
g. Ba2O:
0.6%
