Effect of A-Site Ions Additions on Abnormal Grain Growth and Piezoelectric Properties in NKN-5LT Systems

Abstract:

Article Preview

Dense 0.95(Na0.5K0.5)NbO3-0.05LiTaO3 (NKN-5LT) ceramics, as a candidate for leadfree piezoelectric materials, were developed by conventional sintering process. The effect of additions with A-site ions in perovskite structure on abnormal grain growth and piezoelectric properties in NKN-5LT ceramics was investigated. Sintering temperature was lowered by adding A-site ions as a sintering aid. Abnormal grain growth in NKN-5LT ceramics was observed with varying additions. This grain growth behavior was explained in terms of interface reactioncontrolled nucleation and growth. The electrical properties of NKN-5LT ceramics were investigated as a function of concentration of additions. The electromechanical coupling factor and piezoelectric constant of NKN-5LT ceramics were improved in the samples with A-site ions excess NKN-5LT. These results show that the piezoelectric properties of NKN-5LT samples can be improved by control of the microstructures.

Info:

Periodical:

Materials Science Forum (Volumes 558-559)

Edited by:

S.-J.L. Kang, M.Y. Huh, N.M. Hwang, H. Homma, K. Ushioda and Y. Ikuhara

Pages:

763-766

Citation:

M. S. Kim et al., "Effect of A-Site Ions Additions on Abnormal Grain Growth and Piezoelectric Properties in NKN-5LT Systems", Materials Science Forum, Vols. 558-559, pp. 763-766, 2007

Online since:

October 2007

Export:

Price:

$38.00

[1] R. E. Jaeger and L. Egerton: J. Am. Ceram. Soc., Vol. 45 (1962), p.209.

[2] G. H. Haertling: J. Am. Ceram. Soc., Vol. 50 (1967), p.329.

[3] R. Wang, R. Xie, T. Sekiya, Y. Shimojo, Y. Akimune, N. Hirosaki and M. Itoh: Jpn. J. Appl. Phys., Vol. 41 (2002), p.7119.

[4] L. Egerton and D. M. Dillon: J. Am. Ceram. Soc., Vol. 42 (1959), p.438.

[5] Y. Saito, H. Takao, T. Tani, T. Nonoyama, K. Takatori, T homma, T. Nagaya and M. Nakamura: Nature, Vol. 432 (2004), p.84.

DOI: https://doi.org/10.1038/nature03028

[6] Y. Guo, K. Kakimoto and H. Ohsato: Mater. Lett., Vol. 59 (2005), p.241.

[7] M. -S. Kim, S. Oh, D. -S. Lee, E. -C. Park, S. -J. Jeong, I. -S. Kim, J. -S. Song and Y. -W. Oh: Solid State Phenom., Vol. 124-126 (2006), p.735.

[8] M. -S. Kim, D. -S. Lee, E. -C. Park, S. -J. Jeong, I. -S. Kim and J. -S. Song: Mater. Sci. Forum, Vol. 534-546 (2007), p.1525.

[9] B. K. Lee, S. Y. Chung, and S. -J. L. Kang: Acta Mater. Vol. 48 (2000), p.1575.

[10] C. W. Park and D. Y. Yoon: J. Am. Ceram. Soc. Vol. 85 (2002), p.1585.

[11] M. -S. Kim, J. G. Fisher H. -Y. Lee and S. -J.L. Kang: J. Am. Ceram. Soc. Vol. 89 (2006), p.1237.