High borosilicate glass is made by melting glass through heating in the interior of the glass, which is made by advanced production technology by utilizing the conductive property of glass at high temperature. The contents of SiO 2 (SiO 2) > 78%, B2O 3 (Boron oxide) > 10% in glass tube are very high.

　　It includes main raw materials and auxiliary raw materials. The former guides materials such as oxides, intermediate oxides and oxide outside the network, which form the network structure of glass, while the latter can accelerate the melting of glass or make it obtain some necessary properties.