Pyrex glass tube is named after the material used to prepare these test tubes. Pyrex glass tubes are made of Borosilicate glass. As you browse through glasstubes.eu, you will come across an interesting range of borosilicate alias Pyrex glass tubes. These test tubes are a blend of boron trioxide and silica. These are two important constituents in this type of test tube. What makes the Pyrex glass tube special would be its low coefficient of thermal expansion. Due to its low coefficient of thermal expansion, these test tubes can resist thermal shock easily. When compared to conventional test tubes, borosilicate glass is highly resistant to thermal shock.
Unique properties of Pyrex glass tubes
Due to the low thermal coefficient of Pyrex glass, it is used to prepare a range of laboratory equipment. It wouldn’t be an exaggeration if someone tells you that all their chemical lab equipment are made of borosilicate. This is because borosilicate is highly durable and strong. It can handle extreme heat and chemicals without breaking or even cracking.
The history of Pyrex
If you are keen on learning more about borosilicate test tubes, you must know its history.
Otto Schott was the founder of borosilicate glass. He was a German glassmaker from the 19th century. He was the first to discover this rigid and strong piece of glass. In this modern era, Otto Schott is deemed as the founder of present-day Schott AG. This brand has sold borosilicate glass equipment since 1893. A small part of Schott AG turned into DURAN in the year 2005.
Pyrex glass tubes were introduced in the year 195 by Corning Glassworks. This became an alternate name for borosilicate glass. Experts believe that this English speaking world accepts the term “Pyrex” over borosilicate. Nevertheless, borosilicate glass has become a renowned family of glassware. It is used to prepare glasses for a variety of purposes.
A twist to the story
Pyrex, the European manufacturer used borosilicate glass to prepare a range of kitchen products. Today, the US manufacturer of Pyrex has formulated soda lime glass (the tempered version). This is why Pyrex is identified as borosilicate glass or soda-lime glass when you talk about kitchen appliances. But, when you discuss laboratory glassware from manufacturers like TGI, Pyrex, Simax or Duran, you should refer borosilicate glass. The original manufacturers of borosilicate glass are identified using “PYREX”. The scientific division that uses Pyrex to prepare lab equipment always refer borosilicate glass.
Pyrex glass tubes are formulated using a range of ingredients. This includes aluminum oxide, sodium carbonate, and quartz. In order to increase the thermal and chemical resistance of glass tubes, boron is used. After all, borosilicate glass is bound to have “boron” in it. The actual composition of borosilicate glass is 13 percent of boric oxide, 80 percent of silica, 4 percent of sodium oxide and the rest is aluminum oxide. Trying to increase the melting temperature of the traditional glass is difficult. But, it is more economical to manufacture borosilicate glass.