Pyrex

The pyrex is glass borosilicate presenting a low dilation coefficient. It is mainly used for nontransmissives optics like the mirrors, because its homogeneity is weak and its high porosity. It is also glass resistant to heat because its thermal dilation coefficient is very low.

Origin

Invented by E.C. Sullivan and W.C. Taylor at the laboratories Corning Knell Works in the United States by enriching a composition by borosilicate. Glass obtained supports thermal shocks. It was marketed since 1915 under the name of Pyrex, now entered the current language. The name “Pyrex” is in fact a registered trademark. The articles are produced by the Newell company (Repurchased in 2005 per International Arc (ex-Glassmaking Crystal manufacture of Arch). Pyrex lends itself to work with the blowtorch.

One uses it for:

of the crockery supporting of the variations in temperature and being able to go to fire;
glasses of laboratory;
industrial instruments, balloons and capacities up to 500 liters, pipings and columns until 1000mm of diameter;
the construction of reflectors of telescopes;
tubes to be bent for the realization of ensigns to neon;
small subjects out of coloured glass made inter alia with Murano.

Notes and references of the article

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