Effects of different sintering temperature on the Microstructure and Piezoelectric Properties of Pb(Nb_(2/3)Zn_(1/3)_x(Zr_(52)Ti_(48))_(1-x)O_3 Ceramics

摘要

In this paper, the effects of different sintering temperature on the microstructure and piezoelectric properties of Pb(Nb_(2/3)Zn_(1/3))_(0.03)(Zr_(52)Ti_(48)_(0.97)O_3(PNZZT) ceramic samples were investigated. The Pb(Nb_(2/3)Zn_(1/3)_(0.03)(Zr_(52)Ti_(48)_(0.97)O_3 ceramics materials was prepared by a conventional mixed oxide method. In the period of the experiment, the relationship between crystallographic phase and microstructure were analyzed by X-ray diffraction(XRD) and scanning electron microscopy(SEM) respectively. The XRD patterns shows that all of the ceramic samples are with a tetragonal perovskite structure. Along with sintering temperature increased and the x is 0.03, the grain size gradually become big. Through this experiment, it has been found that when the x is 0.03 and sintered at 1130°C for 2 h, the grains grow well, the grain-boundary intersection of the sample combined well and the porosity of the ceramics decreased, an excellent comprehensive electrical properties of the Pb(Nb_(2/3)Zn_(1/3))_(0.03)(Zr_(52)Ti_(48)_(0.97)O_3 samples can be obtained. Its best electrical properties are as follows: dielectric constant (ε) is 1105, dielectric loss(tg) is 0.017, electromechanical coupling coefficient (K_p) is 0.287, piezoelectric constant(d33) is 150PC/N.