Paper Titles
Evolution of Crystallographic Grain Orientation of (K0.5Na0.5)NbO3 Piezoelectric Ceramics
p.3
Self Assemble Synthesis of Potassium Niobate at Room Temperature
p.7
Preparation of Lead-Free Multi-Layered Piezoelectric Actuator
p.11
Piezoelectric Properties in Textured Ceramics of SrBi2Nb2O9
p.15
Influence of Oxygen Vacancies on the Polarization Properties in Bi4Ti3O12 Ferroelectric Single Crystals
p.19
Piezoelectric Properties and Depolarization Temperatures of (Bi1/2Na1/2)TiO3-(Bi1/2K1/2)TiO3-BaTiO3 Lead-Free Piezoelectric Ceramics
p.23
Influence of Annealing on Domain Structures of Bismuth-Titanate-Based Crystals
p.27
Electrical Properties of Grain-Oriented SrBi2Nb2-xVxO9 Ceramics
p.31
Crystal Growth and Electric-Field-Induced Strain in Bi0.5Na0.5TiO3 Crystals
p.35

Evolution of Crystallographic Grain Orientation of (K0.5Na0.5)NbO3 Piezoelectric Ceramics

Article Preview

Abstract:

The microstructural development of crystalline-oriented (K0.5Na0.5)NbO3 (described as KNN hereafter)-based piezoelectric ceramics during sintering was investigated. The addition of CuO as a sintering aid was found to be effective for fabricating highly oriented and dense KNN ceramics. KNN specimens with 0.5-1.0 mol% CuO sintered at 1100°C for 1 h have both a relative density and a pseudo-cubic {100} orientation degree of 95% or higher. In the early stages of sintering, KNN is formed in the reaction between complementary reactants NaNbO3 and KNbO3, after which oriented grain growth proceeds at a relative density of more than 90%. In addition, the results of TEM observation showed that textured KNN ceramics have a unique pectinate-like domain structure, in which the domain walls consist of {101} planes.

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

Info:

Periodical:

Key Engineering Materials (Volume 320)

Pages:

3-6

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.320.3

Citation:

Cite this paper

Online since:

September 2006

Authors:

Hisaaki Takao, Yasuyoshi Saito, Yoshifumi Aoki, Kayo Horibuchi

Keywords:

Lead-Free, Microstructure, Niobates, Orientation, Piezoelectric Material, Sintering

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2006 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

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

Google Scholar

[2] Y. Saito, Kokai-Tokkyo-Koho, 2000-313664 [in Japanese]. JP 3, 531, 803 (2004) [in Japanese]. United States Patent 6, 387, 295 (2002).

Google Scholar

[3] M. Matsubara, T. Yamaguchi, K. Kikuta and S. Hirano, Jpn. J. Appl. Phys., 43 (2004), p.7159.

Google Scholar

[4] Y. Guo, K. Kakimoto and H. Ohsato, Solid State Commun., 129 (2004), p.279.

Google Scholar

[5] Y. Guo, K. Kakimoto and H. Ohsato, Jpn. J. Appl. Phys., 43 (2004), No. 9B, p.6662.

Google Scholar

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

DOI: 10.1038/nature03028

Google Scholar

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

Google Scholar

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

Google Scholar

[9] M. Matsubara, T. Yamaguchi, W. Sakamoto, K. Kikuta, T. Yogo, S. Hirano, J. Am. Ceram. Soc., 88 (2005), p.1190.

Google Scholar

[10] M. Matsubara, T. Yamaguchi, K. Kikuta and S. Hirano, Jpn. J. Appl. Phys., 44 (2005), p.6136.

Google Scholar

[11] F. K. Lotgering, J. Inorg. Nucl. Chem., 9 (1959).

Google Scholar