... are sodium oxide Na2O,boron oxide(B2O3),silicon dioxide SiO2.Of these ingredients,boron and silicon have high content.The feature of ... durability and electrical property.Moreover,this glass could use in high temperature and has strong hardness,and have the function ... are above 90%.Borosilicate float glass has wide application in lighting,chemical,fireplace,steel,food-machinery,solar energy,optical, ...