Porous PZT ceramic membranes were fabricated by dry pressing PZT powder. Study of sintering temperature on mechanical strength

porosity and pure water permeability showed that the membrane obtained at 950℃ sintering temperature had pure water permeability of 850 L·m-2·h-1·MPa-1

average pore size about 300 nm

mechanical strength of 47.8 MPa

and porosity of 34%. Further study of poling temperature and electric voltage on piezoelectric property of porous PZT ceramic membranes

which were extracted and plasma etched after poling

showed that after poling at temperature of 120℃ and electric field of 4 kV·mm-1

hot alcohol extraction

and 4 min plasma etching

the porous PZT ceramic membranes could create a resonance signal with an amplitude of 34.8 mV when applied to 20 V of an alternating current (AC). Filtration study of the membrane in wastewater oil emulsion with particles of size about 600nm showed that flux decreased to 4% within 2 h without electric field whereas the flux was stabilized at 20% with AC

which indicated the porous PZT membrane had an excellent anti-fouling performance.