Structure and Electrical Properties of Fe<sub>2</sub>O<sub>3</sub>-Doped PZT-PZN-PMnN Ceramics

• 作者: Le Dai Vuong Phan Dinh Gio
• 来源期刊: 现代物理(英文)
• 学科: 化学
• 关键词: Crystal STRUCTURE Dielectrics PIEZOELECTRICS ELECTROMECHANICAL Coupling Factor Fe2O3 DOPING
• 年，卷（期）: xdwlyw_2014,（14）
• 页码范围: 1258-1263
• 页数: 6页
• 分类号: O6

摘要

The 0.8Pb(Zr0.48Ti0.52)O3 – 0.125Pb(Zn1/3Nb2/3)O3 – 0.075Pb(Mn1/3Nb2/3)O3 + x wt% Fe2O3 ceramics (PZT-PZN-PMnN), where x = 0 ÷?0.35, has been prepared by two-stage calcination method. The effect of Fe2O3 content on the crystal structure and electrical properties of ceramics has been investigated. The results of X-ray diffraction (XRD) show that all samples have pure perovskite phase with tetragonal structure, the c/a ratio increases with increasing Fe2O3 content. At x = 0.25, electrical properties of ceramics are best: the density (r) of 7.86 g/cm3, the electromechanical coupling factor (kp) of 0.64, the dielectric constant (εr) of 1400, the dielectric loss (tand) of 0.003, the mechanical quality factor (Qm) of 1450, the piezoelectric constant (d31) of 155 pC/N, and the remanent polarization (Pr) of 37 μC/cm2, which makes it as a promising material for high power piezoelectric devices.