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Re: How long can your oven maintain constant temp and heat?

From the WFO board

Posted by Ed

In Reply to: Re: How long can your oven maintain constant temp and heat? posted by nj guy

Hi NJ Guy,
Perlite & vermiculite are good insulators. They are expanded minerals, therefore contain many air spaces and are lightweight. They will move in the cavity and are able to take up the oven "crush / adjust / shift aside" when the dome and concrete layer heats and expands. Plasticity.

Sand high in organic materials could be used to insulate but I doubt it would be as effective as the expanded minerals. The less dense the material used is, the less heat transfer = better thermal insulating properties. A sand that has no organic material would be a very poor insulator and able to conduct heat.

Hope this helps, regards, Ed

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