Lead
Lead
Physical Properties
Atomic number: 82
Atomic Weight: 207.2
Melting Point: 327.5°C
Boiling point: 1740°C
Density: 11.34g/cm
Bluish silvery white metal.
Chemical property
It is easy to be oxidized by oxygen in the air into the black lead and make its silver white luster gradually became dim and dark. However, this layer of lead oxide film formed a layer of compact prevent the internal load further oxidation.
Specification
Ph-5N(99 999%), <10ppm
Ph-6N(99 9999%), <1ppm
Ph-7N(99 99999%), <0.1ppm
Application
Lead is primarily used in the manufacture of compound semiconductor, refrigerating element, infrared photoelectric converting device, high efficient thermo-element and solder etc.