Electronic cigarette ceramic heating sheet and manufacturing method thereof

Abstract

The invention discloses an electronic cigarette ceramic heating sheet and a manufacturing method thereof. The ceramic heating sheet comprises a zirconia ceramic substrate, an insulating layer is printed on one side of the zirconia ceramic substrate, the other side of the zirconia ceramic substrate is sequentially printed with a heat conducting layer, a heat generating module and a protective layer, the heat generating module comprises a connected heat generating resistance and an inner electrode on which a pad is printed, and the heat conducting layer is formed by coating a silicon carbide slurry comprising zirconia and alumina, wherein the weight proportion of zirconia and alumina is 5%-20% and 20%-45%, respectively. The invention has the advantages of uniform and rapid heating and high reliability.

Description

technical field [0001] The invention mainly relates to the field of ceramic heating sheets for electronic cigarettes, in particular to the field of low-temperature baking ceramic heating sheets for electronic cigarettes. Background technique [0002] In the popular low-temperature baking electronic cigarette smoking sets in recent years, ceramic heating sheets are generally used as the heating element, and the heating temperature is about 280-350 degrees Celsius. Tobacco is baked at this temperature but does not burn, thereby generating smoke. The ceramic heating element is one of the key technologies of the electronic cigarette smoking set. The ceramic heating element of the existing low-temperature baking type electronic cigarette smoking set mainly uses two kinds of substrates: one of which is fired alumina ceramic cooked sheet, and this The ceramic heating element is easy to break due to the poor strength of the alumina ceramic body; the other is to use zirconia ceramics...

AI Technical Summary

Problems solved by technology

[0004] This electronic cigarette ceramic heating sheet has the following defects: 1) The heating resistor is printed on the zirconia ceramic substrate. Due to the low thermal conductivity of the zirconia material (about 2-5W / (m·K), the heat generated by the heating resistor Slow conduction and uneven conduction on the ceramic substrate, resulting in uneven heating temperature or long heating time of the heating sheet; 2) The protective layer sintered at a medium temperature (550-900 degrees Celsius) is repeatedly subjected to thermal shocks at relatively high sintering temperatures Afterwards, microcracks are easy to occur, resulting in the deterioration of the density and insulation of the protective layer, and the resistance value of the heating resistor protected by it drifts or changes, which can eventually lead to the failure of the heating sheet

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