Preparation And Properties Of Rare Earth Piezoelectric Material

Preparation and application of piezoelectric ceramic composite rare earth is now one of the hot topics in materials science. Rare earth element has its unique electrochemical properties,optical properties and magnetic characteristics. Doped with small amounts of rare earth elements in the piezoelectric ceramics have great practical significance to improve its electrochemical energy and piezoelectric properties. In this paper, the rare earth zirconium titanate composite materials with different molar ratios of lanthanum, neodymium or cerium,are prepared from. And the effects of the composition and proportion on its performance are studied. The main contents are as follows:1) A serials of piezoelectric ceramic precursor powder including Lax Nd1-x Zr0.5Ti0.5O3,Ndx Ce1-x Zr0.5Ti0.5O3 and Cex La1-x Zr0.5Ti0.5O3 were prepared by stearic acid method.2) The crystalline structure of the prepared material is characterized by XRD and the unit cell parameters were analysis furtherly using Jade software. The particle size and the dispersion of the prepared materials were observed by the electron microscope. The typical sample of MZr0.5Ti0.5O3(M=Ndx Ce1-x) with similar peak shape and relatively uniform particle size distribution were characterized by FESEM, which suggests that the sample are more significant soft agglomeration, the surface are porous and the diameter of the pore is about 20 nm.3) The Raman spectrum of the samples is characterized by Laser Raman spectrum analyzer.The results showed that the Raman peak appears between140 cm-1 ~ 893 cm-1. The Raman activity of the sample containing the Nd is relatively higher. The peak of the MZr0.5Ti0.5O3(M=Cex La1-x) are wide and noisy;4) UV-Vis spectrum spectroscopy shows that the samples containing Nd have a shallow–trop absorption, and the absorption value increases. Meanwhile, compared to the single element samples, the samples in presence of rare earth elements show various s degree of red shift or blue shift.5) Fluorescence properties of the samples were tested and found that the fluorescence properties of the La0.4Nd0.6Zr0.5Ti0.5O3 significantly better than the other samples.