中国物理B ›› 2009, Vol. 18 ›› Issue (6): 2596-2602.doi: 10.1088/1674-1056/18/6/079

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Structural and electrical properties of Nd ion modified lead zirconate titanate nanopowders and ceramics

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   

  1. (1)School of Information Engineering, Central University for Nationality, Beijing 100081, China; (2)School of Material Science and Engineering, Beijing Institute of Technology, Beijing 100081, China; (3)School of Material Science and Engineering, Beijing Institute of Technology, Beijing 100081, China;College of Chemical Engineering, Qiqihar University, Qiqihar 161006, China
  • 收稿日期:2008-09-27 修回日期:2008-12-18 出版日期:2009-06-20 发布日期:2009-06-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 50742007), the National High Technology Research and Development Program of China (Grant No 2007AA03Z103), the National Defence Foundation of China (Grant No 401050301), the Key Laboratory Foundation of Sonar Technology of China (Grant No 9140C24KF0901), and the Scientific Project of Heilongjiang Province, China (Grant No E2007-31).

Structural and electrical properties of Nd ion modified lead zirconate titanate nanopowders and ceramics

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)†   

  1. a School of Material Science and Engineering, Beijing Institute of Technology, Beijing 100081, China; b College of Chemical Engineering, Qiqihar University, Qiqihar 161006, China; c School of Information Engineering, Central University for Nationality, Beijing 100081, China
  • Received:2008-09-27 Revised:2008-12-18 Online:2009-06-20 Published:2009-06-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 50742007), the National High Technology Research and Development Program of China (Grant No 2007AA03Z103), the National Defence Foundation of China (Grant No 401050301), the Key Laboratory Foundation of Sonar Technology of China (Grant No 9140C24KF0901), and the Scientific Project of Heilongjiang Province, China (Grant No E2007-31).

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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.

关键词: PNZT, ferroelectric properties, piezoelectric properties, sol-gel method

Abstract: 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 (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.

Key words: PNZT, ferroelectric properties, piezoelectric properties, sol-gel method

中图分类号:  (Electronic transport in nanoscale materials and structures)

  • 73.63.-b
61.46.-w (Structure of nanoscale materials) 77.22.Ch (Permittivity (dielectric function)) 77.65.Bn (Piezoelectric and electrostrictive constants) 77.80.-e (Ferroelectricity and antiferroelectricity) 81.20.Fw (Sol-gel processing, precipitation)