Borosilicate glass has a very low thermal expansion, about one of three of soda lime glass. The main approximate compositions are 59.6% silica sand, 21.5% boric oxide, 14.4% potassium oxide, 2.3% zinc oxide and trace amounts of calcium oxide and aluminum oxide.
Do you know what other characteristics?
| Density | 2.30g/cm² |
| Hardness | 6.0′ |
| Elasticity Modulus | 67KNmm – 2 |
| Tensile Strength | 40 – 120Nmm – 2 |
| Poisson Ratio | 0.18 |
| Coefficient of Thermal Expansion 20-400°C | (3.3)*10`-6 |
| Specific Heat Conductivity 90°C | 1.2W*(M*K`-1) |
| Refractive Index | 1.6375 |
| Specific Heat | 830 J/KG |
| Melting Point | 1320°C |
| Softening Point | 815°C |
| Thermal Shock | ≤350°C |
| Impact Strength | ≥7J |
| Water Tolerance | HGB 1级 （HGB 1) |
| Acid Resisting | HGB 1级 （HGB 1) |
| Alkali Resistance | HGB 2级 （HGB 2) |
| Pressure-Resistant Properties | ≤10Mpa |
| Volume Resistance | 1015Ωcm |
| Dielectric Constant | 4.6 |
| Dielectric Strength | 30 kV/mm |
Known for its heat resistance and physical durability, borosilicate glass is used in a wide variety of industries and applications.
– Laboratory Glassware
— Pharmaceutical Glass Tubing
— Cookware & Kitchen Implements
— Optical Equipment
— Lighting Ornament
— Drinking glasses etc.
Saida Glass is a professional GLASS PROCESSING factory over 10years, strive to be the top 10 factories with offering different kinds of customized glass, like cover glass from 7’’ to 120’’ for any display, borosilicate 3.3 glass tubes from min. OD dia. 5mm to max. OD dia. 315mm.
Saida Glass consistently strives to be your reliable partner and let you feel the value-added services.
Post time: Aug-13-2020