Glass ceramic heating substrate coated with inorganic thick film, preparing method and heating assembly

Abstract

The invention provides a glass ceramic heating substrate coated with an inorganic thick film. The glass ceramic heating substrate comprises a glass ceramic substrate carrier, the face-type inorganic thick film, electrodes, wire leading ends and a mica insulation cover plate, wherein the face-type inorganic thick film is arranged on the first surface of the glass ceramic substrate carrier in a high-temperature sintering mode, the electrodes enable the inorganic thick film to be connected into a circuit, the wire leading ends are used for being connected with power source lead wires, and the mica insulation cover plate is attached to the glass ceramic substrate carrier to cover the inorganic thick film, the electrodes and the wire leading ends. The inorganic thick film comprises graphite powder, bismuth oxide, boric oxide, silicon dioxide, antimonous oxide, zinc oxide, strontium carbonate and the like. The nonmetal face-type inorganic thick film glass ceramic heating substrate which is healthy and environmentally friendly is obtained, and the problems that a traditional glass ceramic heating substrate is prone to igniting, excessively high in oxidation speed, damped in resistance, uneven in temperature, high in price, difficult to popularize and the like are solved. The invention further provides a preparing method of the inorganic thick film glass ceramic heating substrate and a heating assembly with the glass ceramic heating substrate.

Description

technical field [0001] The invention belongs to the field of new electrothermal materials, and in particular relates to a heating substrate of glass-ceramic coated with an inorganic thick film, a preparation method thereof and a heating component. Background technique [0002] The glass-ceramic heating plate is the electric heating element of the traditional incubator, heat preservation board, infrared radiator and beauty salon. It adopts the conventional screen printing and high-temperature sintering production process, and the precious metal electric heating film (palladium, silver, ruthenium, etc.) is printed on the back of the glass-ceramic plate carrier, or the electric heating wire mica electric heating sheet is pasted on the glass-ceramic substrate. A glass-ceramic heating plate with a composite structure technology such as pasting a soft thin-layer electric heating film and an electric heating wire on the back of the glass-ceramic with double-sided adhesive as the he...

AI Technical Summary

Problems solved by technology

The technical defect is that when the product is working, because the product is a "linear" heat source heating structure, the power density per unit area is high, the surface temperature is high, the expansion coefficient of the glass carrier and the resistance coating is different, it is easy to deform, and there is noise during work. Where there is a heating wire, the temperature is very high, and abnormal conditions such as short circuit of the heating wire, ignition, and rapid oxidation occur; because the glue used in the composite heating plate of the product is made of organic materials, there is a peculiar smell and a large amount of gas is released during work. Harmful smoke is generated; because the product is a composite structure, the long-term high-temperature intermediate adhesive layer is easy to age and delaminate, resulting in aging delamination between the glass-ceramic carrier and the heating element, resulting in air thermal resistance, resulting in local high temperature, excessive product aging, and working for a certain period of time After that, the total power of the product is attenuated by about 20%, and it is expensive and difficult to promote. This series of products has been gradually eliminated

Compared with today's highly developed science and technology, the above-mentioned series of technologies are obviously not applicable to people's constant pursuit of health and environmental protection.

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