Pyrex glass, also known as Belle heat-resistant glass, is a kind of glass with excellent heat resistance. It is widely used in kitchen supplies, chemical laboratory instruments and optical equipment. It has become a general trademark of its raw material boronized glass.
Pyrex day ass; Pyrex type gla is a kind of borosilicate hard glass with high silica content. Main chemical composition: silica 78% #i l `}, boron trioxide 11 5% – 13 5} , alumina 2 0% – 3.%, Sodium oxide 3.6% – 5.2}. Density 2.2-2 25g Icm;: Coefficient of thermal expansion (3.? – 4.5) x L (1 -} I} softening temperature 8f10-853. The temperature difference between heat shock and shock is 2fip-3pp}. It has low coefficient of thermal expansion, high thermal stability, high mechanical strength and strong acid resistance (except hydrofluoric acid); The softening point is high and can withstand the drastic temperature change of flame processing. “Pyrex” glass was originally the trade name of Corning Glass Company of the United States, and now there are similar commodities in various countries, such as “Duran 5p” (17uran-50) in Germany, “hysi1” in Britain, “thalex” (` l}erex) in oral form, and “gg-l7” and “13jty” in China. It is used to manufacture experimental instruments, vacuum system devices, cooking utensils, and pipelines and equipment in chemical, pharmaceutical, food and other industries
