Chemical Formula: Ba
Catalog Number: ST0003
CAS Number: 7440-39-3
Shape: Discs, Plates, Column Targets, Step Targets, Custom-made
Atomic Weight: 137.327
Atomic Number: 56
Color/Appearance: Silvery White, Metallic
Thermal Conductivity: 18 W/m.K
Melting Point (°C): 725
Coefficient of Thermal Expansion: 20.6 x 10-6/K
Theoretical Density (g/cc): 3.5
Z Ratio: 2.1
UN Number: 1400
Comments: Wets without alloying, reacts with ceramics. Not recommended for sputtering.
Barium is a chemical element originated from the Greek ‘barys’, meaning heavy. It was first mentioned in 1772 and observed by W. Scheele. The isolation was later accomplished and announced by H. Davy. “Ba” is the canonical chemical symbol of barium. Its atomic number in the periodic table of elements is 56 with location at Period 6 and Group 2, belonging to the s-block. The relative atomic mass of barium is 137.327(7) Dalton, the number in the brackets indicating the uncertainty.
1. No bonding service is presently available for this material.
2. This material has high chemical activity when exposed to the environment. Oil packaging and clean procedure are required to prevent it from chemcial reactions.
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