tilavuuslasi

Tilavuuslasi, also known as borosilicate glass or borosilicate, is a type of glass with the main glass-forming constituents silica and boron oxide. It is known for its low coefficient of thermal expansion, which makes it resistant to thermal shock. This property allows tilavuuslasi to withstand rapid changes in temperature without breaking, making it suitable for applications where temperature fluctuations are common.

Tilavuuslasi is typically composed of about 80% silica (SiO2), 12-13% boron oxide (B2O3), and smaller amounts of other oxides such as sodium oxide (Na2O), potassium oxide (K2O), and aluminum oxide (Al2O3). The addition of boron oxide significantly lowers the melting point of the glass and improves its thermal shock resistance.

Due to its excellent thermal properties, tilavuuslasi is widely used in laboratory glassware, such as beakers, flasks, and test tubes. It is also used in the manufacture of glass cookware, as it can withstand high temperatures without warping or breaking. Additionally, tilavuuslasi is used in the production of glass fibers for insulation and in the automotive industry for headlamps and other components that require high thermal resistance.

The term "tilavuuslasi" is Finnish, and it translates to "volume glass" in English. This name reflects the glass's ability to withstand changes in volume due to temperature fluctuations, which is a key characteristic of borosilicate glass.