The linear expansion coefficient (α) presents a parameter describing the monodimensional expansion of a solid body due to a temperature change.
The expansion behavior of glass affects the formation of stresss, for instance during cooling down or because of a thermal shock.
Usually the temperature range between 20 and 300 °C is regarded.
(Samples: bar-shaped, length: 50 mm, thickness: 3-8 mm, at least two test pieces)