Preparation and Properties Study of PMNT Pyroelectric Ceramic Materaials

The PMNT ceramics with complex perovskite structure were prepared by the soft chemistry method.X-ray diffraction was used to detect the perovskite phase evolution and the presence of the pyrochlore phase in PMNT ceramics.The grain morphology was observed by scanning electron microscopy(SEM).The pyroelectric and piezoelectric properties of the ceramics were studied.The results show that the PMNT ceramics posses high densities and good pyroelectric properties.The pyroelectric coefficient of 0.67PMN-0.33PT ceramics is 5.5×10-4C m-2 K-1,Fd is 3.9×10-5 Pa-1/2.