Thinking You're An Expert In Piezoelectric Ceramic Sensor

Pollution resistance of porous PZT piezoelectric ceramics is treating porous PZT piezoelectric ceramic membranes were used in 5 g oil-containing emulsion waste water filtration experiments, the average diameter of the oil droplets is about 600 mm, but the particle size distributes widely, existing oil droplets with a particle size are less than 200 mm ,pzt piezoelectric actuators are the major contributors to contaminate in the membrane pores during filtration. Polarized porous PZT piezoelectric ceramic films have the highest vibration response at 190 kHz, and the unpolarized porous PZT piezo tube stack films did not detect ultrasonic signals. Polarized and unpolarized PZT ceramic membranes were chosen to conduct four groups of filtration experiments with and without AC application at 190 kHz AC and 20 V AC. The polarization of PZT ceramic membrane in the absence of alternating current conditions, the permeate flux decayed of electronic piezoelectric transducerwithin 2 h to about 4% of the initial value. Under the condition of applying AC power, the permeate flux can be maintained at about 20% of the initial flux in 4 h operating time, and the steady flux is increased by 400% compared with that without ac current. However, the permeation flux of unpolarized PZT ceramic membrane decreased to 4% of the initial flux in 2 h under both electric and electric fields. This shows that by applying an AC electric field.