Why can't a f containing compound be used in a porcelain crucible, a Lilac Garden?
The main components of a porcelain crucible are alumina and silica, while fluorine is very oxidizing, and at high temperature fluorine will replace the oxygen in the oxide and corrode the crucible. Although the contents of the crucible may not be sufficient to penetrate the crucible, the accuracy of the experiment will be affected by the fact that the crucible is not dissolved in the content of the component.
The F containing compound can not be used in the ceramic crucible for combustion and drying. The main reason is that the corrosion of fluorine on porcelain at high temperature.
Therefore, a platinum crucible and a high-purity graphite crucible with a high temperature, chemical stability and corrosion resistance can be adopted, so as to avoid interference experiments.
