It is a nickname for the heat resistant ceramic case in which a coil of resistance wire is potted.
Ceramic heating resistor.
However even this description is out of date.
You can also choose from other ceramic resistor heater as well as from other ceramic resistor heater and whether ceramic resistor heater is other.
Ceramic heating rings made of silicon nitride can be produced with an outer diameter of up to 300 mm.
They are most often wire wound resistors.
The good thermal conduction and the low thermal mass of the ceramic material allow extremely fast heating rates a uniform temperature distribution and high control accuracy.
Ceramic heaters can take a variety of form factors to handle specific kinds of applications.
A typical extent of the rings is 5 mm.
A wide variety of ceramic resistor heater options are available to you such as other.
However there are also advanced ceramic heaters that have a different kind of heating element.