Printing electric heating membrane calandria based on vitrified enamel plate and preparation technique thereof

Abstract

The present invention provides a printing electrothermal film heating body based on an enamelled steel sheet, and its preparation technology, the heating body is composed of an enamelled steel sheet, a dielectric layer, a resistance layer, an electrode layer and a covering layer of the electrothermal film surface, the enamelled steel sheet is composed of a steel sheet and an enamelled steel layer of its surface, the dielectric layer, the resistance layer, the electrode layer and the covering layer are obtained by printing, drying, sintering of dielectric paste, resistor paste, electrode paste and dielectric paste, the dielectric paste is rolled by glass powder and organic adhesive, the resistor paste is rolled by glass powder, ultrafine silver powder, ultrafine palladium powder and resistor adhesive, the electrode paste is rolled by glass powder, ultrafine silver powder, flake silver powder and resistor adhesive, the glass powder is composed of bismuth oxide, silica, boron oxide, alumina, zinc oxide. The heating body has advantages of low cost, quick heat, warming-up, high heat efficiency and high mechanical strength etc.

Description

Technical field: [0001] The invention relates to a printed electric heating film heating body based on an enamel plate and its preparation technology, that is, the dielectric paste, resistance paste and electrode paste are printed on the enamel of the enamel plate by a screen printing process to form an electric heating film pattern, and sintered Curing to form a heating body that can generate electricity and generate heat. The invention also relates to the ingredient formulation and preparation technology of the dielectric slurry, resistance slurry and electrode slurry suitable for the enamel plate, and the interlayer structure design and preparation technology of the electrothermal film. Background technique: [0002] Electric heating film is an important category of electric heating elements. It is a new type of electric heating element that has developed rapidly in recent years. It can be applied to almost all medium and low temperature electric heating fields, especiall...

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Problems solved by technology

[0005] However, the traditional electrothermal film substrate materials are mostly brittle materials such as glass and ceramics, which are difficult to install; the thermal conductivity of the substrate material is low, so the power density is low; the resistivity of the conductive component of the film layer is high, in order to reduce the resistance of the resistance layer To increase the power, it has to increase the thickness or increase the area. Due to its brittle nature, it is difficult to withstand thermal shock and easily lead to early failure of components

The material cost of the electrothermal film on the stainless steel substrate is high, and the insulating layer needs to be processed, which makes the processing difficult, which hinders the popularization and application of this type of electrothermal film

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