1、 Measurements and tolerances
Unit：mm
Thickness | Max diameter |
2.0±0.1 | 660±0.2 |
1.0±0.08 | 660±0.2 |
0.5±0.04 | 660±0.2 |
0.3±0.03 | 660±0.2 |
Special sizes can be manufactured based on customers' requirements
2、 Physical and chemical properties
Purity：Mo≥99.95%；99.97%
W ≥99.95%;
Density：Mo≥10.2g/cm3 ；
W ≥19.3g/cm3；
Application temperature environment：≤2300℃;
3 、Manufacture process and equipment
Item | Process | Equipment | Quality check point |
1 | Mo sheet or W sheet | 1 Physical and chemical properties | |
2 | Check | 2 Measurements (length, width, and thickness ) 3 Surface quality | |
3 | Wire cutting | Wire cutting machine | 1 Surface clearness |
4 | Machining | CNC milling machine | 2 Tolerance according to drawing |
5 | Clean | Bending machine | 3 No pollutant on surface, and no crack |
6 | Check | Drilling press, Lathe | |
7 | Assembly | Assembly platform | 1 Surface clearness |
8 | Clean | 2 Solid structure and no loose | |
9 | Check | 3 Assembly tolerance | |
10 | Package | 4 Show certificate of quality |
4、 Application
As the heat-shield parts in the sapphire growth furnace, the most decisive function of upper and bottom cover plate is to prevent and reflect the heat in the furnace. Heat-shield parts with high-density, exact-
measurement, smooth-surface, convenient-assembly and reasonable-design has great significance in improving the crystal-pulling。
