Ceramic heater
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A ceramic heater as a consumer product is a space heater that generates heat using a heating element of PTC (Positive Temperature Coeffient) ceramic.[1]
Ceramic heaters are usually portable and typically used for heating a room or small office, and are similar[how?] to metal-element fan heaters.
How ceramic heaters work
PTC ceramic material is semi-conductive and when voltage is applied to it, the power decreases quickly as it reaches a certain temperature according to the particular composition of the ceramic. This means its temperature is self-regulating.
The ceramic elements are in contact with aluminium fins, thereby heating the fins up. A fan blowing across the fins heats the air.
Differences from other electric heaters
Electric heating elements[clarification needed (See hidden comment here by clicking edit.)] made of resistance wire also have a positive temperature coefficient of resistivity, but do not increase their resistance enough to be self-regulating; they are typically used with the wires red-hot. The ceramic, on the other hand, increases its resistance sharply at the Curie temperatures of the crystalline components, typically 120 degrees Celsius, and remains below 200 degrees Celsius, providing a significant[according to whom?] safety advantage.[2]
References
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