|
delivery condition
|
specification
|
tolearance
|
thickness
|
roughness
|
||
|
diameter
|
height
|
diameter
|
height
|
|||
|
sintered
|
10-550
|
10-750
|
+/-5.0
|
+/-5.0
|
8-20
|
＜3.5
|
|
sintering finishing
|
10-450
|
10-550
|
+/-0.5
|
+/-1.0
|
7-18
|
＜2.5
|
1. High density;
2. Good corrosion resistance;
3.The surface roughness of tooled crucibles does not exceed Rz 6.3;
4.The use temperature below 2450ºC in vacuum or deoxidize atmosphere;
5.Manufactured based on customers' requiremen.
| Atomic number | 74 |
| CAS number | 7440-33-7 |
| Atomic mass | 183.84 [g/mol] |
| Melting point | 3420 °C |
| Boiling point | 5555 °C |
| Density at 20 °C | 19.25 [g/cm3] |
| Crystal structure | Body-centered cubic |
| Coefficient of linear thermal expansion at 20 °C | 4.4 × 10-6 [m/(mK)] |
| Thermal conductivity at 20 °C | 164 [W/(mK)] |
| Specific heat at 20 °C | 0.13 [J/(gK)] |
| Electrical conductivity at 20 °C | 18.2 × 106 [S/m] |
| Specific electrical resistance at 20 °C | 0.055 [(Ωmm2)/m] |
