Metal slurry, heating circuit, atomizing core, preparation method of atomizing core, and electronic cigarette

Abstract

The invention provides metal slurry, which comprises metal powder, glass powder and an organic carrier, wherein a mass ratio of the metal powder to the glass powder to the organic carrier is 100:(5-10):(10-20); the metal powder comprises Ni powder, Cr powder and NiCr20 alloy powder; the median particle size of the Ni powder and the median particle size of the Cr powder are both smaller than 10 microns, and the median particle size of the NiCr20 alloy powder ranges from 15 microns to 50 microns; and the chemical formula of the glass powder is B-Si-Al-M2O-NO, M is alkali metal, and N is alkaline earth metal. The invention further provides a heating circuit made of the metal slurry, an atomizing core comprising porous ceramic and the heating circuit, a preparation method of the atomizing core and an electronic cigarette. The bonding strength between the heating circuit prepared from the metal slurry and the porous ceramic is high, the strength of the porous ceramic is not affected, the assembly and use requirements of the atomizing core of the electronic cigarette can be met, and the service life of the electronic cigarette is prolonged.

Description

technical field [0001] The invention belongs to the technical field of electronic cigarettes, and in particular relates to a metal paste, a heating circuit, an atomizing core and a preparation method thereof, and an electronic cigarette. Background technique [0002] The electronic cigarette is equipped with a heating element on the atomizing surface of the atomizing core. The current heating element is mostly a layer of metal paste printed on the surface of the porous ceramic substrate, which is a thick-film heating circuit formed by drying and sintering. , the heating circuit heats the e-liquid impregnated on the atomizing surface to atomize it to generate smoke for the user to inhale. Since there is no fixing member between the thick-film heating circuit and the porous ceramic, the two are only bonded and fixed by sintering. Therefore, the bonding strength between the two directly affects the service life of the electronic cigarette. The bonding strength is generally det...

AI Technical Summary

Problems solved by technology

The bonding strength is generally determined by dry burning method (for example, at 6.0W constant power, continuously energized for 6 minutes) or thermal shock method (for example, at 6.0W constant power, energize for 3s, stop for 15s, then energize for 3s, stop for 15s... ...a total of 20 cycles, a total of 6 minutes) to evaluate, when the bonding strength is not enough to support the above experimental conditions, the thick film heating circuit will be separated from the porous ceramic, and the thick film heating circuit will be peeled, and even cause The heating circuit is detached from the porous ceramic substrate

[0003] In the prior art, it is generally used to add more glass powder to the resistance slurry to increase the interface bonding strength between the heating circuit and the porous ceramic, but when the glass powder content in the slurry is large, although the heating circuit and the ceramic substrate The bonding strength between them has been improved, but too much glass powder impregnated into the porous ceramic matrix will lead to "vitrification" of the ceramic matrix, resulting in brittle fracture of the ceramic matrix, which seriously affects the assembly and use requirements of the electronic cigarette core.

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