permeability of PZT piezoelectric ceramic membrane

Preparation of porous PZT ceramic membrane by dry pressing. When the calcination temperature of piezoelectric plate sensor is 950 ℃, the film piezoelectric actuators for compression sensor   has good comprehensive properties, the mechanical strength is 47.8 MPa, the porosity is 34%, the permeability of pure water piezo tube stack is about 850 L·m-2·h-1·MPa-1, the pore size Distributed around 300 mm. (2) The porous PZT high temperature piezoceramic membrane immersed in insulating oil for high-pressure polarization. The results show that when the temperature of oil bath is controlled at 120 ℃ and the polarization voltage is 4 kV·mm-1, the polarization amplitude of the PZT piezoelectric ceramic membrane obtained by polarization is the highest and the piezoelectric performance is the best. (3) The pure water permeability of PZT piezoelectric ceramic membrane can be restored to about 700 L·m by hot ethanol cleaning and surface plasma etching, which still has strong piezoelectric properties. (4) The experimental results show that the steady flux barometric pressure sensor of porous PZT piezoelectric ceramic membrane is 20% of the initial value when the AC electric field is applied at resonance frequency, which is 400% higher than that of PZT ceramic membrane without piezoelectric property. And the retention of oil components in the system stabilized at about 95.6%. (5) The porous PZT piezoceramic sphere crystal ceramic membrane prepared in this paper proves the feasibility of PZT ceramic for the preparation of separation membrane and the good anti-pollution performance of PZT piezoelectric membrane. Because the prepared porous membrane of  pickup piezo transducer has a symmetrical structure, the thicker the membrane leads to the permeability Therefore, it is necessary to reduce the film thickness of piezo sounder PZT materials in the subsequent work to prepare a porous PZT piezoelectric separation membrane with asymmetric structure.