Borosilicate Glass

This type of optical glass is made up of a minimum of five percent of Boric Oxide, hence the "Borosilicate" (or boro aspherics as they are sometimes called) name for the glass.

The boric oxide in the glass creates a very heat resistant material and also is very resistance to chemical to corrosion.

The glass is made by mixing boron to the normal glassmaker's frit of silicate soda, sand and lime. Because the Borosilicate Glass melts at a higher temperature there are many new techniques using burners with natural gas and oxygen - boro makes it ideal for firepolished aspherics.

Colored borosilicate, is widely used in the art glass trade as well as in scientific optical components.

What makes Borosilicate glasses resistant to thermal shock is the fact that it has very low coefficient of thermal expansion (~ 5 ×10-6 / °C at 20°C).Ideal for Fireploished aspheric lenses.

Borosilicate Glass is used in the making of scientific instruments, including aspheric lenses, and was once used as a glass for domestic use such as kitchen ware, now they use pryex. Otto Schott, a German glassmaker is thought to have created the formula in the 19th century and the process for making optical and scientific uses was improved in the early 20th century and is continually moving forward with the creation of Borosilicate nanoparticles by the Swiss.

This optical glass can be used in extreme cold and extreme heat - this is great for use in laboratory glassware. Because it has a lower rate of thermal expansion it can be very useful for items such as high precision lenses and telescopes especially when the surface of the apheric lens very even - giving a clear image.

There are many uses for borosilicate glasses including aquarium heaters, many top quality torches or flashlights use borosilicate glass lens, astronomical reflecting telescope glass mirror components, and even the space shuttle have their insultation tiles are coated with borosilicate. Many "Rockers" will recognise boro as it is used in premanufactured in glass guitar slides.

Borosilicate nanoparticles - The Federal Institute of Technology at Lausanne in Switzerland were able to form borosilicate nanoparticles of 100 to 500 nanometers in diameter.


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