Maximum heating element temperature and watt density.
Furnace heating element materials.
7 10 gm cm 3.
Ptc ceramic materials are named for their positive thermal coefficient of resistance i e resistance increases upon heating.
Before beginning our comparison of heating element materials let s take a moment to point out that when rating the materials for maximum temperature we are referring to the maximum element temperature not the maximum furnace temperature.
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High resistance to oxidation.
While most ceramics have a negative coefficient these materials often barium titanate and lead titanate composites have a highly nonlinear thermal response so that above a composition.
Temperature coefficient of resistance at 20 o c.
Resistivity at 20 o c.