The product types of ceramic heater manufacturers are distinguished from materials
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 small thermal resistance and high heat exchange efficiency. It is an electric heater with automatic constant temperature and power saving.
Structural principle: PTC ceramic heating element is a kind of positive temperature coefficient self-controlling ceramic heating element sintered at high temperature.
Main advantages: The surface temperature of the PTC ceramic heating element can be automatically controlled and constant, which can prevent dry burning.
Main disadvantages: 1. The surface of the PTC ceramic heating element itself is charged, and it needs to be installed in a special heat dissipation component after surface insulation treatment, which increases assembly costs; 2. The product and the heated object are indirectly heated due to heat loss during the work process, which leads to a decrease in thermal efficiency; 3. . PTC ceramic heating element heating will gradually attenuate the power as the working time increases; 4. The lead content of the product does not meet the environmental protection requirements.
Ceramic heater manufacturers
MCH ceramic heating element
MCH ceramic heating element uses alumina ceramics, which is a new type of environmentally friendly and energy-saving ceramic heating element with built-in electric heating wire. Compared with PTC ceramic heating element, it can save 20~30% electric energy under the same heating effect.
Structural principle: A new type of heating element made of alumina ceramics with high thermal conductivity as the matrix, heat-resistant and refractory metal as the internal electrode to form a heating circuit, and co-fired at a high temperature of 1600°C through a series of special processes.
Main advantages: The surface of the product is not charged, and the working process is isolated from water and electricity; the ceramic substrate is not easy to form scale during use; the volume is small, the power density (≥35w/cm²) and the heating speed is fast (the temperature can reach above 900°C within 30 seconds), High thermal efficiency; good safety, heating circuit sealed in ceramic, insulation withstand voltage 4200V/S without breakdown, product insulation resistance ≥100MΩ; long service life, average life ≥10000 hours; product acid and alkali resistance; product use process The medium power is stable, and the power will not decay in long-term use; it does not contain harmful substances and meets the ROHS requirements; the product can withstand dry burning.
Main disadvantages: complex production process and high cost
Precautions for MCH heating element:
Due to the fast heating speed, care must be taken to prevent burns
In general, MCH ceramics are more environmentally friendly than PTC ceramics, have higher thermal efficiency, and have a longer service life, but they cannot automatically control the temperature.