Borosilicate glass from GVB
We have the right material for your application
You need components made of Borosilicate glass 3.3?
GVB offers you a wide range of cylindrical and flat borosilicate glasses. In addition, we also supply components such as standard ground joints and threads in a wide variety of designs.
Our borosilicate glass 3.3 is food safe, extremely sturdy, impact and scratch resistant. It is characterised by extraordinary temperature resistance and can withstand even strong temperature changes.
Thermal, physical, mechanical and electrical properties
| Subject | Value | Unit |
|---|---|---|
|
Mean linear coefficient of expansion
(20 - 300 °C according to ISO 7991, DIN 52328) |
3,3 - 10 ^-6 |
K ^-1 |
|
Transformation temperature Tg
(ISO 7884-8) |
525 |
°C |
Viscosity temperatures
| Subject | Value | Unit |
|---|---|---|
|
10 ^14.7 dPa -s (lower cooling temperature, ISO 7884-7) |
510 |
°C |
|
10 ^13 dPa -s (upper cooling point, ISO 7884-7) |
560 |
°C |
|
10 ^7.6 dPa -s (softening temperature, ISO 7884-2, 7884-6) |
825 |
°C |
|
10 ^4 dPa -s (processing temperature, ISO 7884-2, 7884-5) |
1260 |
°C |
|
Short-term recommended maximum service temperature |
500 |
°C |
|
Density at (20°C) |
2,23 |
g/cm ^3 |
|
Modulus of elasticity |
64 - 10 ^3 |
MPa |
|
Poisson's ratio |
0,20 |
|
|
Thermal conductivity (20 - 100 °C) |
1,2 |
W - m ^-1 - K ^-1 |
|
Specific heat capacity (20 - 100 °C) |
0,98 - 10 ^3 |
J - kg - K ^-1 |
|
Spec. electrical resistance in dry environment (20 °C) |
10 ^13 - 10 ^15 |
Ohm - cm |
|
Dielectric constant (20 °C, 1 MHz) |
4,6 |
|
|
Dielectric loss factor |
4,9 - 10 ^13 |
|
Chemical properties
|
Water resistance (according to ISO 719) |
HGB 1 |
|
Acid resistance (according to ISO 1776) |
Class S1 |
|
Alkali resistance (according to ISO 695) |
Class A2 |
Contact
borosilicate glass experts now
Monika Brauers
Product Management Borosilicate Glass & Colored Glass
Monika.Brauers@g-v-b.de
Tel.: +49 2406 665588-17
Mobile: +49 176 47346463
