Principle Design of Ceramic Heating Body

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In life, many household appliances need to rely on their heating components to heat, such as coffee machines, water dispensers, ovens, etc. In the past, the preparation of these large-duty parts often used metal as the basic structural raw material. During use, due to long-term heating, it is easy to cause oxidation of parts and affect their service life.

Alumina ceramics are a good choice to avoid these problems. A new generation of medium and low temperature heating elements-alumina ceramic heating elements-alumina ceramic heating elements can be synthesized by printing resistance paste on alumina ceramics, high temperature co-firing, and treated with electrodes and leads.

The main raw and auxiliary materials are alumina ceramic heating element.

At a melting point of 2050 ° C., amphoteric oxides, poorly soluble in water and non-polar organic solvents, are generally between 93 and 96%.

Water-soluble polymer insoluble in gasoline, kerosene, vegetable oil, etc.

1. works.

The current popular resistance heating principle is designed for alumina ceramic heating bodies, that is, when the current passes through the heating wire, the heating wire will heat. The alumina ceramic heating body has metal positive temperature characteristics, and the product resistance will increase with the increase of temperature., So as to reduce the actual power of the product without affecting the heating effect.

Ceramic heating element that is energized to generate heat.

2. classification and application.

At present, the common alumina ceramic heating elements are: ceramic electric heating tube, ceramic heating plate, ceramic heating plate, ceramic electric heating ring, etc., can choose different shapes and styles according to different applications. Its common characteristics are high electrical conversion efficiency, fast heating speed, high temperature resistance, corrosion resistance, and long service life.

In terms of application, ceramic heating body components are mainly used for: household electric heating appliances-small warm air heaters, hair dryers, clothes dryers, heaters, heating mobile phones, dryers, electric splints, electric irons, electric soldering irons, hair straighteners, Curling hair irons, electronic thermos, thermos, electric cookers, toilet ceramic heaters, water heaters, etc.; industrial-industrial drying equipment, electrothermal adhesives, water, oil, acid heaters, etc; electronic industry-small special crystal device constant temperature bath; In medical treatment, such as infrared physiotherapy instrument, intravenous injection heater, etc.

3. preparation points.

Take alumina ceramic heaters as an example-in many high-power applications, alumina heaters have high quality requirements, especially their thermal shock resistance. The thermal shock resistance of the material depends on the internal thermal stress, geometry and environmental media, so the thermal shock resistance of ceramic materials is a comprehensive performance corresponding to various heating conditions and external constraints.

Since the preparation of the alumina ceramic heating sheet is based on the design requirements of the heating circuit, the heating resistance paste is printed on the ceramic blank, and then multi-layer stacking and burning are carried out. Therefore, in addition to the performance of the alumina ceramic itself, the heat resistance of the alumina ceramic heating sheet is also related to the bonding ability of the resistance paste and the alumina ceramic, the heating uniformity of the heating wire, the residual stress of the screen printing process, and the sintering process. The distribution, installation and use stress and other conditions are not negligible. For example, the design of the printing line should make the temperature gradient during heating as small as possible, and it is not easy to form a thermal stress concentration effect, otherwise the heating sheet is easy to break.

Alumina ceramic bursting heating sheet.

Small alumina ceramic heating parts not only meet the requirements of environmental protection, do not contain lead, cadmium, mercury, polybrominated biphenyls, polybrominated diphenyl ethers and other harmful substances, but also have corrosion resistance and high temperature resistance.