Difference Between Silicon Carbide Crucible And Graphite Crucible Of Ceramic Electric Heater The Prices Are Different

Dec 08, 2022

Difference between silicon carbide crucible and graphite crucible of ceramic electric heater The prices are different

The price difference between graphite crucible and silicon carbide crucible is about 3 times.

1. Graphite crucible has good thermal conductivity, but it is easy to be oxidized and has large damage rate. Compared with graphite crucible, silicon carbide crucible has larger volume and longer service life;

2. The silicon carbide crucible is a bowl shaped container with a deep ceramic bottom. Crucibles must be used when solids are to be heated by high fire. Because it can withstand higher temperature than glassware;

3. The silicon carbide crucible is usually used without putting the melted things too full, so as to prevent the heated objects from jumping out, and allow the air to pass in and out freely for possible oxidation reaction;

4. Because the bottom of the SiC crucible is very small, it can be directly heated by fire only when it is supported on the clay triangle;

5. The SiC crucible can be placed on the iron tripod either vertically or obliquely, and can be placed on its own according to the needs of the experiment;

6. After heating, the silicon carbide crucible cannot be placed on the cold metal table immediately to prevent it from cracking due to rapid cooling;

7. The silicon carbide crucible shall not be placed on the wooden table immediately to avoid burning the table or causing fire;

8. The SiC crucible has higher bulk density than the graphite crucible, high temperature resistance, fast heat transfer, acid and alkali resistance, high temperature strength, and high oxidation resistance. Its service life is 3-5 times that of the clay graphite crucible