Thermal Expansion
The coefficient of linear thermal expansion is one of the characteristic properties by which glass is measured and is defined as the change in unit length per degree rise in temperature. The thermal expansion is 33 x 10-7 per °C between 20°C and 300°C and is controlled to a tolerance of ± 0.5 x 10-7 per °C. Due to its porous structure, sintered glass has a slightly different thermal expansion. Care should be taken when fusing it to massive borosilicate glass 3.3.
