What is the difference between DURAN® and soda-lime glass?
DURAN® is a borosilicate glass 3.3. The coefficient of linear expansion, α= 3.3 x 106 K1. This means that the glass expands by some 3.3 x 10-6 length units per Kelvin, over a temperature range of +20C to +300C. The smaller the linear expansion coefficient, the more resistant the glass is to temperature variations. At larger expansion coefficients (compare the linear coefficient of expansion for soda lime glass, α= 9.1 x 106 K1), the temperature difference during heating causes stresses in the glass and thus possible breaking.
DURAN® is a borosilicate glass 3.3. The coefficient of linear expansion, α= 3.3 x 10–6 K–1. This means that the glass expands by some 3.3 x 10-6 length units per Kelvin, over a temperature range of +20°C to +300°C. The smaller the linear expansion coefficient, the more resistant the glass is to temperature variations. At larger expansion coefficients (compare the linear coefficient of expansion for soda lime glass, α= 9.1 x 10–6 K–1), the temperature difference during heating causes stresses in the glass and thus possible breaking.
