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 |