Effect of Doping Nb₂O₅ on Microstructure and Properties of Piezoelectric Ceramics PSZT

Abstract:

o improve the electrical properties of PSZT piezoelectric ceramics, a ceramic powder Pb0.94Sr0.06(Zr0.52Ti0.48)O3 (PSZT) with Nb2O5 was designed. The power was prepared by solid state sintering. The surface structure of sample was characterized using SEM, and the crystal structure of the sample was examined by XRD. The capacitance and dielectric loss of sample was measured by Tonghui Electronics TH2618 capacitor tester. The result of microstructure and electrical properties show that Nb2O5 inhibit crystal growth when the contents of Nb2O5 is less than 0.5.wt%, but excessive Nb2O5 cause pyrochlore phase producing while the contents of Nb2O5 more than 0.5wt.% . The excellent piezoelectric properties are achieved in the ceramics with 0.5wt.% Nb2O5:εr=1504,tanδ=0.0065,d33=336pC/N, kp=0.562.

• Periodical: Applied Mechanics and Materials (Volumes 217-219)
• Pages: 1182-1185
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.217-219.1182
• Online since: November 2012
• Authors: Ling Peng, Qi Bin Liu
• Keywords: Nb-Doped, Perovskite Structure, PSZT Piezoelectric Ceramics

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