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Ultrasonic spray drying is a technique that utilizes ultrasonic atomization for powder preparation, particularly advantageous in the production of multi-component composite powders. Ultrasonic spray drying employs a liquid precursor. In solution, different components can be uniformly mixed by precisely controlling the stoichiometric ratio; then, using ultrasonic atomization, the mixture is dispersed into tiny droplets and sent into a high-temperature drying furnace. The particles are finally collected. The ultra-fine powder produced by this method comes directly from the drying of tiny droplets. Therefore, no subsequent washing or grinding is necessary. This is a direct and continuous one-step process that converts liquid raw materials into dry powder, simple and easy to operate, with potential scalability. Ultrasonic spray drying technology is widely used in the preparation of high-temperature superconducting ceramics, PLA and PLGA nanoparticles, and catalyst materials.
Figure 1. Siansonic's ultasonic spray drying nozzle
The powder obtained through ultrasonic spray drying offers excellent control over both particle morphology and size. The ultrasonic atomization part can be customized based on different requirements such as the properties of the solution and the desired particle size. Thus, the HC series ultrasonic spray drying nozzles can produce particles of specific sizes by selecting the ultrasonic frequency of the nozzle; additionally, a forced cooling design enables them to withstand high temperatures; a built-in temperature sensor also facilitates real-time monitoring of the nozzle's operating temperature. Furthermore, its special structural design allows it to penetrate deep into the drying furnace, directly delivering the mist into the high-temperature drying zone. This effectively prevents the accumulation of mist or other adverse effects caused by uneven temperatures.
Siansonic Technology offers clients a range of ultra-fine powder preparation solutions from research and development to pilot scale to mass production, including but not limited to ultrasonic spray drying nozzles, high-temperature reactors, and electrostatic collection systems.
