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Electric Properties of SiC Heating Elements
SiC heating element has a rather large specific resistance which changes with rise in temperature. It has a resistance value of 600 ~ 1400 Ohm.mm 2 /m when the surface of its heat-generating part reaches 1050 oC while being heated in air.
The curve below illustrates the surface resistivity of SiC. Its values decline when temperature is below 1000 oC; rise when above 1000 oC.
Surface resistivity vs. Temperature