Soda-lime glass Material Properties
Soda-lime glass is the most common glass available and is composed primarily of Silicon Dioxide (SiO2), sodium oxide (Na2O) and calcium oxide or lime (CaO) which acts as a stabilizer. Characteristic properties include hardness and resistance to corrosion. Soda-lime glass is dimensionally stable and has chemical durability. High specific resistivity and a low dielectric constant make it useful as an electrical insulator. Excellent for applications where light transmission is important. Soda-lime is sensitive to changes in temperature with a high coefficient of thermal expansion and poor thermal shock resistance. Polished balls make extremely good seals in check valves.
Applications for precision balls include: valves, spacers, insulators, bearings, lenses
Soda-lime glass
| PHYSICAL PROPERTIES | |
|---|---|
| chemical composition | SiO2 69% to 73% |
| K2O + Na2O 16% to 20% | |
| CaO + Al2O3 7% to 10% | |
| density | 2.47 g/cm3 |
| MECHANICAL PROPERTIES | |
| hardness | 671 HV |
| THERMAL PROPERTIES | |
| maximum working temperature | 300 °C |
| transformation temperature | 517 °C |
| deformation temperature | 590 °C |
| coefficient of expansion | 9.17 x10-6K-1 |
| CHEMICAL PROPERTIES | |
| hydrolytic class | 4 |
| OPTICAL PROPERTIES | |
| refractive index | 1.51 |
