I want to activate some carbon inside a microwave. Temperatures will reach 900 C, hence ceramic is the best choice. However, it is quite difficult to find air tight ceramic containers. I intend to use a ceramic fiber blanket to seal all the gaps. on the ceramic bowl as well as on the outside of microwave to minimize any airflow in the carbon.

I do not foresee any challenges with this. Just waned to confirm.

I want to activate some carbon inside a microwave. Temperatures will reach 900 C, hence ceramic is the best choice. However, it is quite difficult to find air tight ceramic containers. I intend to use a ceramic fiber blanket to seal all the gaps. on the ceramic bowl as well as on the outside of microwave to minimize any airflow in the carbon.

I do not foresee any challenges with this. Just waned to confirm.

On a related note, I need to measure the temperature. One of the options is to make a hole in microwave for the sensor to pass through. Another is to use thin probe wires. Want to use the first one because I have the sensor. What will be the best way to seal the hole in microwave when i am not using the sensor? Microwaves shouldn't leak.

Appreciate your help.