Advantages of ultrasonic spraying compared with traditional spraying

Compared with traditional spraying, ultrasonic spraying has the advantages of high coating uniformity, high raw material utilization rate, high coating thickness control precision, thinner coating thickness, less splashing, no clogging of nozzles, and low maintenance costs. Let us briefly introduce the main advantages of ultrasonic spraying.

1. High raw material utilization and less splashing. Because ultrasonic spraying is liquid atomization by ultrasonic oscillation, the process of coating atomization does not require any gas, that is, the atomization process does not require pressure, and only a very low level is applied after atomization. The carrier gas pressure transports the liquid mist, so the rebound and splashing of the liquid caused by the two-fluid spraying high-pressure air is reduced, thereby greatly improving the utilization rate of the coating. The raw material utilization rate of ultrasonic spraying is more than 4 times that of ordinary air spraying, and the utilization rate can reach more than 90%.

2. The nozzle is not clogged and the maintenance cost is low. Because the ultrasonic nozzle realizes the liquid atomization through ultrasonic oscillation, and the atomization particle is determined by the ultrasonic oscillation frequency, it is different from the traditional nozzle, and the nozzle diameter does not need to be small to achieve The small atomized particles reduce the risk of nozzle clogging.

3. High precision of coating thickness control The main factor affecting the precision of coating thickness is the spraying flow rate of the coating, which is the amount of material loaded on the substrate per unit time. The ultrasonic nozzle has no pressure effect on the liquid, so the flow rate of the sprayed coating liquid can be completely controlled by the high-precision metering pump, thereby realizing high-precision spraying flow control. For example, a high-precision syringe pump has a flow control accuracy of up to picoliters per second, and the micro-channel design of the ultrasonic nozzle can also achieve the overall control accuracy of nanoliters per second.

4. The coating thickness is thin, up to tens of nanometers. Because the spray volume of the ultrasonic nozzle can achieve a very low stable flow rate (0.001ml/min), it can achieve a very small amount of loading on the substrate, thereby achieving a very thin Dry film. For some nanomaterials, the dry film thickness can be as low as tens of nanometers. It can be used to prepare glass films such as transparent conductive film, antireflection and antireflection film, heat insulation film, hydrophilic and hydrophobic film.