中国物理B ›› 2012, Vol. 21 ›› Issue (3): 37701-037701.doi: 10.1088/1674-1056/21/3/037701

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田晓霞1,屈绍波1 2,杜红亮1,李晔1,徐卓2   

  • 收稿日期:2011-06-24 修回日期:2011-09-19 出版日期:2012-02-15 发布日期:2012-02-15
  • 通讯作者: 田晓霞,xiaoxiatian@126.com E-mail:xiaoxiatian@126.com

Effects of (LiCe) co-substitution on the structural and electrical properties of CaBi2Nb2O9 ceramics

Tian Xiao-Xia(田晓霞)a)†, Qu Shao-Bo(屈绍波)a)b), Du Hong-Liang(杜红亮)a), Li Ye(李晔)a), and Xu Zhuo(徐卓)b)   

  1. a. College of Science, Air Force Engineering University, Xi醤 710051, China;
    b. Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, Xi醤 Jiaotong University, Xi醤 710049, China
  • Received:2011-06-24 Revised:2011-09-19 Online:2012-02-15 Published:2012-02-15
  • Contact: Tian Xiao-Xia,xiaoxiatian@126.com E-mail:xiaoxiatian@126.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 50632030 and 10804130) and the Shaanxi Provincial Natural Science Foundation, China (Grant No. 2011JM6012).

Abstract: The piezoelectric, dielectric, and ferroelectric properties of the (LiCe) co-substituted calcium bismuth niobate (CaBi2Nb2O9, CBNO) are investigated. The piezoelectric properties of CBNO ceramics are significantly enhanced and the dielectric loss tanδ decreased. This makes poling using (LiCe) co-substitution easier. The ceramics (where $\Box$ represents A-site Ca2+ vacancies, possess a pure layered structure phase and no other phases can be found. The Ca0.88(LiCe)0.04$\Box$0.04Bi2Nb2O9 ceramics possess optimal piezoelectric properties, with piezoelectric coefficient (d33) and Curie temperature (TC) found to be 13.3 pC/N and 960 ℃, respectively. The dielectric and piezoelectric properties of the (LiCe) co-substituted CBNO ceramics exhibit very stable temperature behaviours. This demonstrates that the CBNO ceramics are a promising candidate for ultrahigh temperature applications.

Key words: co-substitution, structural properties, electrical properties, CaBi2Nb2O9

中图分类号:  (Piezoelectric and electrostrictive constants)

  • 77.65.Bn
77.80.B- (Phase transitions and Curie point) 77.84.-s (Dielectric, piezoelectric, ferroelectric, and antiferroelectric materials)