| Resistance to
Thermal Shock |
|
Resistance to thermal shock is not an exact, by defined physical
quantity (for more details see ISO 718); it depends on the measuring
method, the shape, the wall thickness and the surface and end properties
of the glass object in question. Rapid temperature changes cause high
temporary stress in the glass, meaning that rapid cooling processes
are very dangerous, since in this case a thin outer layer of the glass
is placed under tensile stress over the still hot inner core. Glass
is much more susceptible to tensile stress than to compressive stress.
The following graph shows the resistance to thermal shock of the tubes
Duran, Durobax, Fiolax Clear, Fiolax Amber, Illax and AR-Glas: |
 |
|
