Newly developed micro-particle technology (droplet collision method)
The "G-smasher," a disintegration device using the droplet collision method, employs a Laval nozzle to generate a supersonic air jet and supplies a slurry into the nozzle. The slurry supplied into the nozzle is atomized and accelerated by the adiabatic expansion of compressed air, colliding at high speed with a collision plate. Traditionally, jet mills utilizing Laval nozzles have been widely used for dry grinding, but the particle ejection speed was limited to subsonic (100-200 m/s). In this method, by suppressing the generation of shock waves at the slurry supply section within the nozzle and exploring a stable supply method for the slurry, it became possible to atomize the slurry within the nozzle and accelerate it up to supersonic speeds (360 m/s). Furthermore, since this method supplies the slurry to the air jet for grinding without media, it can reduce contamination caused by wear of seals and media. Additionally, the droplets supplied inside the nozzle are accelerated and simultaneously cooled by the adiabatic expansion of air, which helps to suppress the heat generated during grinding, eliminating the need for a cooling unit.
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Newly Developed Micronization Technology (Droplet Collision Method) - A completely new wet dispersion and emulsification technology utilizing supersonic jet streams. - Capable of breaking down and dispersing aggregated particles into nanoparticles (primary particles) in a short time without using any grinding media and with fluid pressure below 0.6 MPa! 【Features of the Droplet Collision Method】 ▲ The slurry, atomized into droplets, possesses powerful grinding capability as it collides with the impact plate at supersonic speeds. ▲ The slurry is accelerated by being placed on air at a maximum of about 0.6 MPa, eliminating the need for high-pressure sealing parts (wear and tear). ▲ Since the droplets are cooled simultaneously during acceleration, there is no heat generation during the disintegration process, and a cooling unit is unnecessary. 【Relationship Between Jet Speed and Temperature Inside the Laval Nozzle】 The G-smasher is a device that uses a Laval nozzle to generate a supersonic air jet, atomizing the slurry into droplets and colliding them (droplet collision method) for micronization. The slurry supplied to the Laval nozzle is atomized into droplets with an average particle size of 10 μm and accelerated simultaneously due to the adiabatic expansion of compressed air, colliding with the impact plate at supersonic speeds. When the supersonic droplets collide with the impact plate, shock waves are generated within the droplets and in the liquid film on the surface of the impact plate, causing the internal aggregated particles to disintegrate and disperse.
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Achievements: Currently testing high-performance semiconductor materials, pharmaceutical materials, pigments, and food materials. Technical Keywords: Nanotechnology, nanoparticles, ultrafine particles, micronization technology, wet dispersion and emulsification technology, manufacturing equipment. *Patent obtained.
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