In Situ TEM Observation of Crystallization Process for LiNbO3 and NaNbO3

Hiromi Nakano; Yoko Suyama

doi:10.4028/www.scientific.net/AST.63.47

Paper Titles

Synthesis of Alumina and Aluminum Nitride Layers on a Graphitic Substrate via a Sol-Gel Route
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Synthesis of Monodispersed Plate-Like CeO₂ Particles by Precipitation Process in Sodium Hydrogen Carbonate Solution
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Co-Doping Effect of Metal Ion on the Visible Light Responsive Photocatalytic Properties of Nitrogen Doped Titanium Dioxide
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Tailored Silica Based Xerogels and Aerogels for Insulation in Space Environments
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In Situ TEM Observation of Crystallization Process for LiNbO₃ and NaNbO₃
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Microwave Assisted Solvothermal Synthesis and Visible Light Photocatalytic Properties of Nb and N Co-Doped SrTiO₃ Nanoparticles
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Numerical Simulation of Spark Plasma Sintering
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Densification Mechanism of MgAl₂O₄ Spinel during Spark-Plasma-Sintering
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Production and Characterization of Boron Carbide – Titanium Diboride Ceramics by Spark Plasma Sintering Method
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HomeAdvances in Science and TechnologyAdvances in Science and Technology Vol. 63In Situ TEM Observation of Crystallization Process...

In Situ TEM Observation of Crystallization Process for LiNbO₃ and NaNbO₃

Abstract:

Fabrication of advanced electronic components requires high-quality powders. In this work, nano-powders of Li or Na niobates are synthesized from (Li or Na)-Nb ethoxide by a sol-crystal method. A single crystal of (Li or Na)-Nb ethoxide is decomposed to an amorphous matrix below 473 K. Next, small crystals are grown by heating at the appropriate temperature for each specimen. The sol-crystal method provides homogeneous quality and fine grains by heating at lower temperature. Structural analysis of the powders is performed by a transmission electron microscope (TEM) and X-ray diffraction. As a result, LiNbO3 turns to dense-powders, but NaNbO3 forms nano-porous powders. In order to understand this difference, we try to observe in-situ the crystallization and grain growth processes by high-temperature TEM. We successfully observe in-situ this processing and discuss the structural change and formation mechanism of LiNbO3, comparing these features with those of NaNbO3.

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Advances in Science and Technology (Volume 63)

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47-51

DOI:

https://doi.org/10.4028/www.scientific.net/AST.63.47

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Online since:

October 2010

Authors:

Hiromi Nakano, Yoko Suyama

Keywords:

High-Temperature TEM, In Situ Observation, Microstructure, Nano Grain

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References

[1] R. S. Weis and T. K. Gaylord: Appl. Phys., Vol. A37, (1985), p.191.

Google Scholar

[2] L. Pardo, P. Duran-Martin, J. P. Mercurio, L. Nibou, and B. Jimenez: J. Phys. Chem. Solids., Vol. 58(9), (1997), p.1335.

Google Scholar

[3] L. Nibou, M. Manier, and J. P. Mercurio: Ann. Chem. Sci. Mat. Vol. 23, (1998), p.135.

Google Scholar

[4] K. Kusumoto: Jpn. J. Appl. Phys. Vol. 46(10B), (1997), p.7094.

Google Scholar

[5] Y. Suyama and N. Nagasawa: J. Am. Ceram. Soc. Vol. 77(2) (1994), p.603.

Google Scholar

[6] H. Nakano, T. Yano, Y. Suyama: J. Ceram. Soc. Jpn., Vol. 113(1), (2005), p.59.

Google Scholar

[7] H. Nakano, Y. Hirano, Y. Suyama: J. Soc. Mater. Sci. Jpn. Vol. 56(6), (2007), p.500. [in Japanese].

Google Scholar

[8] K. Terabe, A. Gruverman, Y. Matsui, N. Iyi, K. Kitamura: J. Mater. Res. Vol. 11(12), (1996), p.3152.

Google Scholar

[9] A. Z. Simoes, M. A. Zaghete, B.D. Stojanovic, A. H. Gonzalez, C. S. Riccardi, M. Cantoni, J. A. Varela: J. Europ. Ceram. Soc. Vol. 24, (2004), p.1607.

Google Scholar

[10] S. Hirano: Electronic Ceramics, Vol. (9), (1991), p.20. [in Japanese].

Google Scholar