Piles of borosilicate glass powder

Borosilicate Glass

This revolutionary glass type was invented by SCHOTT’s founder Otto Schott in 1887. Formed by adding a high percentage of boric oxide to silica as an additional network former in a glass melt, borosilicate glass has several surprising properties, making it ideal for demanding technical applications.
Range of borosilicate glasses of different thicknesses

A perfect recipe

Based on two main building blocks, silica and boric oxide, borosilicate glass exhibits a highly connected glass network. This material shows higher chemical and thermal resistance than conventional glasses such as soda-lime glass. Designers and engineers benefit from superior quality and versatility, enabling them to realize their ideas.

Glass U-bend made from DURAN® borosilicate glass

Glass with many faces

One of the strengths of borosilicate glass is its ability to be processed a number of ways. It can be drawn as tubes for pharmaceutical packaging or rolled, drawn or micro-floated as flat glass to offer a variety of thicknesses and incredible smoothness. With reshaping, this material provides an unrivaled range of geometries for an expanding number of applications.

Scientist pouring glass powder into a ceramic bowl in a laboratory

Material variants

Different borosilicate glass subtypes are defined by the mixture of boric oxide and silica, as well as the presence of other components. Borosilicate glasses with a low alkaline and alkaline earth content offer high chemical resistance, low coefficients of thermal expansion (CTE), and high electrical insulation. By increasing the alkaline and alkaline earth content, the CTE can be adjusted according to the application.

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