Paper Titles
Domain Dynamics of C-Axis Polarization in Bismuth Titanate Crystals
p.69
Electromechanical Poling Treatment of Barium Titanate Single Crystals and their Piezoelectric Properties
p.73
Defects and Leakage Current in PbTiO3 Single Crystals
p.77
Syntheisis and Characterization of Bismuth Tungstate Crystals by Solution Growth Technique
p.81
Defect Control for Superior Properties in K0.5Na0.5NbO3 Single Crystals
p.85
Introduction of Fine Engineered Domain Configuration into Potassium Niobate Single Crystals
p.89
Phase Transition Temperatures of Divalent and Trivalent Ions Substituted (Bi1/2Na1/2)TiO3 Ceramics
p.93
Crystal Phase and Orientation Dependence of Electro-Optic Effect in Epitaxial PLZT an PZT Films
p.99
Structure and Electric Property of BaTi2O5 Film by Laser Ablation
p.103

Defect Control for Superior Properties in K0.5Na0.5NbO3 Single Crystals

Article Preview

Abstract:

Single crystals of K0.47Na0.53NbO3 (KNN) and Mn-substituted KNN (Mn-KNN, K0.53Na0.47Mn0.004Nb0.996Oy) were grown by a flux method, and the influence of lattice defects on the polarization and leakage current properties was investigated. As-grown KNN did not show an apparent polarization hysteresis loop due to its large leakage current (~10-3 A/cm2). The substitution of 0.4%-Mn at the Nb site and subsequent annealing under a moderate oxidative condition were effective in suppressing the leakage current of KNN crystals. 0.4%-Mn-KNN annealed at 1100°C in air exhibited a low leakage current (~10-8 A/cm2), a relatively large remanent polarization of 40 μC/cm2 and a coercive field of 12 kV/cm at 25°C. The oxidation of Mn and Nb ions during annealing in air is found to play an essential role in the low leakage current of Mn-KNN.

You might also be interested in these eBooks
Electroceramics in Japan X View Preview

Info:

Periodical:

Key Engineering Materials (Volume 350)

Pages:

85-88

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.350.85

Citation:

Cite this paper

Online since:

October 2007

Authors:

Yoichi Kizaki, Yuji Noguchi, Masaru Miyayama

Keywords:

Ferroelectric, Mn Substitution, Piezoelectric, Potassium Sodium Niobate(KNN), Single Crystal

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2007 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] Y. Saito, H. Takao, T. Tani, T. Nonoyama, K. Takatori, T. Homma, T. Nagaya and M. Nakamura, Nature (London), 432 (2004), p.84.

DOI: 10.1038/nature03028

Google Scholar

[2] Y. Guo, K. Kakimoto and H. Ohsato, Appl. Phys. Lett., 85 (2004), p.4121.

Google Scholar

[3] G. Zang, J. Wang, H. Chen, W. Su, C. Wang, P. Qi, B. Ming, J. Du, L. Zheng, S. Zhang and T. R. Shrout, Appl. Phys. Lett., 88 (2006), No. 212908.

DOI: 10.1063/1.2206554

Google Scholar

[4] G. Shirane, R. Newnham and R. Pepinsky, Phys. Rev., 96 (1954), p.581.

Google Scholar

[5] S. Tashiro, H. Nagamatsu and K. Nagata, Jpn. J. Appl. Phys., 41 (2002), p.7113.

Google Scholar

[6] B. T. Matthias and J. P. Remeika, Phys. Rev., 82 (1951), p.727.

Google Scholar

[7] Y. Kizaki, Y. Noguchi and M. Miyayama, Appl. Phys. Lett., 89 (2006) No. 142910.

Google Scholar

[8] L. Egerton and Dolores M. Dillon, J. Am. Ceram. Soc., 42 (1959) p.438.

Google Scholar

[9] M. Matsubara, T. Yamaguchi, K. Kikuta and S. Hirano, Jpn. J. Appl. Phys., 44 (2005), p.258.

Google Scholar

[10] K. Kakimoto, I. Masuda and H. Ohsato, J. Euro. Ceram. Soc., 43 (2004).

Google Scholar

[100] C.

Google Scholar