Carbon burn off and heating element damage
Posted: Sun Aug 03, 2014 4:14 pm
Hey good people,
I have caught warnings hither and thither about careful ventilation of electric kilns with coil-type heating elements when burning off carbon, and perhaps other substances (e.g. CMC or other binders, etc.). I believe I have also heard it expressed also that creating an unenclosed reducing atmosphere in the kiln—say, because you wanna go cray-cray with certain ceramic glaze styles of chemistry—is quite bad for the heating elements. That's cool and all, and I try and behave nicely to my kiln, and worry about long term lifespan of my heating elements. Two questions, though:
Do these cautions apply to heating elements that are embedded within a ceramic lid? (I assume so, but thought I would ask).
I was talking to an engineer friend about glass and kiln work, and he was puzzled by the process whereby a reducing atmosphere harms the heating elements. Can someone explain the chemistry and physics behind it?
Thanks!
I have caught warnings hither and thither about careful ventilation of electric kilns with coil-type heating elements when burning off carbon, and perhaps other substances (e.g. CMC or other binders, etc.). I believe I have also heard it expressed also that creating an unenclosed reducing atmosphere in the kiln—say, because you wanna go cray-cray with certain ceramic glaze styles of chemistry—is quite bad for the heating elements. That's cool and all, and I try and behave nicely to my kiln, and worry about long term lifespan of my heating elements. Two questions, though:
Do these cautions apply to heating elements that are embedded within a ceramic lid? (I assume so, but thought I would ask).
I was talking to an engineer friend about glass and kiln work, and he was puzzled by the process whereby a reducing atmosphere harms the heating elements. Can someone explain the chemistry and physics behind it?
Thanks!