- Composition analysis, particle size distribution are tested for each batch of tungsten powder before putting into production.
- To make sure the crucible is not skewed, there are strict requirements for the vertical degree and the parallel degree of the stands and supporting plates. And they must be 100% checked.
- Each tungsten stands and supporting plates is subject to ultrasonic detection to ensure there is no flaw inside.
Storage & Usage Recommendations:
- Stands and plates must be stored in a dry area (humidity less than 60%), otherwise it is easy to be oxidized.
- When setting up the stands and plates in the sapphire grower, they and their base must be always horizontal not only at room temperature but also at working temperature to ensure the crucible is not skewed while working.
- Because of the continuous pressure at high temperature, deformation happen for the stands and plates. Recommend to use ceriated tungsten plates because it will strengthen the creep resistance efficiently at high temperature.
