Ordinary glass, namely soda-lime silicate glass, is a kind of silicate glass. Its chemical composition is Na2O CaO 6SiO2, and its main component is silicon dioxide. The main components of high borosilicate glass are boron trioxide and silicon dioxide. In the manufacturing process of ordinary silicate glass, sodium silicate sand, soda water and ground lime are added. The boron content and silicon content of high borosilicate glass can reach 14% and 80% respectively, while ordinary glass species generally do not add boron.
Borosilicate material is used in high borosilicate glass, which replaces a large number of harmful heavy metal ions in the original glass and improves the cold and hot shock resistance of the glass. Even if the temperature changes suddenly, the glass will not burst. For example, an ordinary glass placed outdoors in winter will expand and burst when heated by adding hot water; However, even if the high borosilicate glass is placed at -30℃, it will not burst when hot water of 100℃ is added.
Advantages of high borosilicate glass
High borosilicate glass is a special glass material with low expansion rate, high temperature resistance, high height, high hardness, high transmittance and high chemical stability. Because of its excellent performance, it is widely used in solar energy, chemical industry, medical packaging, electric light source, craft ornaments and other industries. Its good performance has been widely recognized by all walks of life in the world, especially in the field of solar energy, and has been widely promoted in developed countries such as Germany and the United States.
The fire resistance and physical strength of borosilicate glass make it an ideal choice for laboratories. This is a kind of laboratory equipment, which is used to make high-durability glass, such as beakers and test tubes. Glass cookware is another common usage. Almost all American standard plates are made of borosilicate glass measuring cups with marks on them, which can be used for measurement and are widely used in American kitchens.
The above contents refer to Baidu Encyclopedia-High Borosilicate Glass.