Chemical Formula: W
Catalog Number: ST0407
CAS Number: 7440-33-7
Purity: 99.95%
Thermal Conductivity: 174 W/m.K
Melting Point (°C): 3,410
Coefficient of Thermal Expansion: 4.5 x 10-6/K
| OD | ID | L | |
| Dimension | 5.5”-7” | 5”-5.5” | <138” |
Tungsten, also called wolfram, is a chemical element originated from the Swedish ‘tung sten’ meaning heavy stone(W is wolfram, the old name of the tungsten mineral wolframite). It was first mentioned in 1781 and observed by T. Bergman. The isolation was later accomplished and announced by J. and F. Elhuyar. “W” is the canonical chemical symbol of tungsten. Its atomic number in the periodic table of elements is 74 with location at Period 6 and Group 6, belonging to the d-block. The relative atomic mass of tungsten is 183.84(1) Dalton, the number in the brackets indicating the uncertainty.
Related Product: Tungsten (W) Sputtering Target
Related Post: Discovery and development of tungsten | History of Tungsten
Comparing with planar targets, rotatory target contains more material and offers a greater utilization, which means longer production runs and reduced downtime of the system, increases the throughput of the coating equipment. Besides, rotatory sputtering target allows the use of higher power densities due to the heat build-up being spread evenly over the surface area of the target. As a consequence, an increased deposition speed can be seen along with an improved performance during reactive sputtering.
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