Installation of silicon molybdenum rods

Vertical suspension

Silicon molybdenum rods at room temperature brittle large, high temperature and plasticity. So the U-type silicon molybdenum rod is the best installation method is vertical suspension. The silicon molybdenum rod is vertically suspended from the top of the furnace by means of a retaining clip. The purpose of this installation is to avoid the mechanical stress added to the silicon-molybdenum rod heating side, or easily lead to broken silicon molybdenum rod.

Fixed clip

The weight of the entire silicon molybdenum rods are borne by the fixed clip, the position of the silicon molybdenum rod is also determined by it. Therefore, it must be carefully installed to ensure that the components are vertically suspended. In order to avoid local overheating, silicon molybdenum rod bottom cone part must be extended into the furnace.

3. Connect the tape

Contact with silicon molybdenum rods are made of aluminum braid or multi-layer aluminum foil. Outside the clip only play a clamping effect, not to conduct electricity. The end of the wire is connected to the bus. In order to avoid the mechanical stress spread to the silicon molybdenum rod, the wire length should be slightly larger than the linear distance between the silicon molybdenum rod and the bus.

When installing the components, the screws on the chuck do not twist too tightly until the silicon molybdenum rod rises to high temperature and then tighten, because this time the silicon molybdenum rod has a certain plasticity, easy to break. Chuck part of the temperature is generally not higher than 200 degrees Celsius. Therefore, the chuck wire and silicon molybdenum rod contact voltage should be reduced by 0.1V. In order to avoid radiation heat transfer to the chuck, chuck the bottom and wear the top of the distance should not be less than 50mm. In order to avoid damage, the general diameter of 6 / 12mm silicon molybdenum rod can not be long-term use of 170A, diameter 9 / 18mm silicon molybdenum rod can not be long-term use of 300A.