中国物理B ›› 2009, Vol. 18 ›› Issue (6): 2596-2602.doi: 10.1088/1674-1056/18/6/079
袁杰1, 王大伟2, 赵全亮2, 刘红梅2, 王之英2, 曹茂盛2, 张德庆3
Wang Da-Wei(王大伟)a), Zhang De-Qing(张德庆)a)b), Yuan Jie(袁杰)c), Zhao Quan-Liang(赵全亮)a), Liu Hong-Mei(刘红梅)a), Wang Zhi-Ying(王之英)a), and Cao Mao-Sheng(曹茂盛)a)†
摘要: A modified sol-gel method is used for synthesizing Nd ion doped lead zirconate titanate nanopowders Pb1 - 3x/2NdxZr0.52Ti0.48O3 (PNZT) in an ethylene glycol system with zirconium nitrate as zirconium source. The results show that it is critical to add lead acetate after the reaction of zirconium nitrate with tetrabutyl titanate in the ethylene glycol system for preparing PNZT with an exact fraction of titanium content. It has been observed that the dopant of excess Nd ions can effectively improve the sintered densification and activity of the PNZT ceramics. Piezoelectric, dielectric and ferroelectric properties of the PNZT ceramics are remarkably enhanced as compared with those of monolithic lead zirconate titanate (PZT). Especially, the supreme values of piezoelectric constant (d33) and dielectric constant (\it ε) for the PNZT are both about two times that of the monolithic PZT and moreover, the remnant polarization (Pr) also increases by 30%. According to the analysis of the structures and properties, we attribute the improvement in electrical properties to the lead vacancies caused by the doping of Nd ions.
中图分类号: (Electronic transport in nanoscale materials and structures)