What are the ceramic heaters divided from the material？
PTC ceramic heating element
PTC ceramic heating element is a thermistor, which is composed of PTC ceramic heating element and aluminum tube.It has the advantages of low thermal resistance and high heat transfer efficiency.Structure principle :PTC ceramic heating body is a kind of heating coefficient controlled temperature ceramic heating body.Main advantages: the surface temperature of PTC heating body can be controlled and kept constant to prevent dry burningMain disadvantages :
The surface of PTC heating element itself is charged, which requires the surface insulation treatment to be installed in the special heat dissipation module, increasing the assembly cost;
The product and the heating object are the heat loss in the indirect heating process, which leads to the decrease of thermal efficiency;
3. The heating power of PTC ceramics will gradually decline with the increase of working time;
4. Lead does not meet the environmental requirements.
MCH ceramic heater
MCH ceramic heating element USES alumina ceramic heating element, which is a new type of high-efficiency, environment-friendly and energy-saving ceramic heating element, with internal heating wire. Compared with PTC ceramic heating element, it saves 20~30% electricity under the condition of the same heating effectStructure principle: with high heat conductivity of alumina ceramic substrate, with heat resistant refractory metal as the inner electrode form heating circuit, through a series of special process in a total of 1600 ℃ high temperature burning and become a new type of heating element.
Main advantages: no electric surface, water and electricity isolation in working process;Ceramic substrates are not easy to scale during operation.Volume small, the power density (35 w/cm after) or heating speed (more than 30 seconds can reach 900 ℃), high thermal efficiency.Security good, hot line seal in ceramics, high voltage 4200 v/S no breakdown, products insulation resistance acuity Ω of 100 m;Long service life, average life is more than 10000 hours;Good acid and alkali resistance;The product is stable in power and will not attenuate in long term.No hazardous substance is in compliance with ROHS requirements;The product can withstand dry burning.
Main disadvantages: complex manufacturing process and high costNotes for MCH heating:Due to rapid heating, care should be taken to prevent burnsIn general, MCH ceramics are more environmentally friendly than PTC ceramics, have higher thermal efficiency, and have a longer service life, but cannot be controlled at constant temperature.
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