Contrary to the common impression that "e-cigarettes are imported products", e-cigarettes are products invented by Chinese people, and most of their products are also manufactured by Chinese people. They have returned from abroad to China in the new consumer trend.

    The first electronic cigarette in the world was invented by Han Li, a Chinese pharmacist, in 2004. It was intended to help his father quit smoking. In the same year, he created his own electronic cigarette brand "Ruyan". Even though this electronic cigarette has a smell of "smelly Century egg", its business performance was impressive in that year. Within three years of its establishment, Ruyan's annual sales exceeded 1 billion yuan and its annual sales exceeded 300000 units.

    According to statistics from The New York Times in 2014, the e-cigarette supply chain centered around Shenzhen provided over 300 million e-cigarettes, approximately 90%, to the global e-cigarette market. The data provided by the Electronic Cigarette Industry Committee of the China Electronics Chamber of Commerce also shows that China's electronic cigarette industry is mainly distributed in Shenzhen and Dongguan. There are 907 domestic electronic cigarette manufacturers, with Shenzhen accounting for 85.7% and Dongguan accounting for 10%; Among 86 cigarette oil manufacturers, Shenzhen accounts for 72% and Dongguan accounts for 10%.

    With the continuous increase of global tobacco control efforts, new tobacco products have gradually become an important development direction and research hotspot for tobacco products, especially electronic cigarettes, which have become one of the hotspots of new tobacco products worldwide due to their advantages in reducing the release of harmful components. Electronic cigarettes are a new type of product that uses rechargeable lithium polymer batteries to power atomizers, which generate smoke by heating the electronic liquid in the "cigarette cartridge" (dry burning type is a specially heated cut tobacco), replacing traditional cigarettes.

    The atomizer is the core component in electronic cigarettes, mainly composed of atomization (heating) components, liquid guide, liquid storage components, and connecting components. At present, most e-cigarettes use resistance heated atomizers, which are relatively mature in development. The technological innovation of atomizers mainly solves problems such as safety, sensory quality, and atomization effect of atomizers.

    In terms of improving the safety of atomizers, it mainly involves preventing problems such as oil leakage and dry burning. In the atomizer, ceramic materials are used instead of glass fibers to prevent harm to the human body caused by inhaling glass fibers. Using porous ceramic material components instead of existing fiber ropes to avoid dry burning of heating wires and effectively prevent oil leakage. By using new resistance materials such as ceramic materials, the heating and atomization effect can be improved. Among them, the double-sided ceramic heating element has a fast heating rate, uniform temperature distribution, and small difference in resistance values between the two sides, solving the problem of warping and even fracture caused by inconsistent heating rate and temperature on both sides.

    Method for preparing atomizer and ceramic atomizer core: The ceramic atomizer core comprises a porous body and a heating element arranged on the porous body, and the porous body comprises at least one layer of porous ceramic layer doped with hydroxyl groups. By setting at least one porous ceramic layer doped with hydroxyl groups, hydrogen ions in nicotine in the tobacco oil before atomization through the porous body can react with hydroxyl groups, reducing the protonation degree of nicotine in the tobacco oil, thereby improving the absorption of nicotine in the lungs and enhancing the user experience.

    When the d50 of porous ceramics is less than 5um, the smoke particle size generated through the ceramic atomization core is 90% not greater than 100nm. Controlling the pore size distribution of the porous ceramic atomization core to make its d50 less than 5um can ensure that the smoke particle size d50 is not greater than 100nm. This particle size is easy to enter the lungs, facilitate coagulation and delivery to the lungs, and improve lung absorption rate.

    The Weinai intelligent grinding and dispersion equipment (horizontal pry bar sand grinding+precision ceramic three rollers) plays an indispensable role in controlling the pore size distribution of porous ceramic atomization cores.