Paper Title:
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.

  Info
Periodical
Edited by
Pietro VINCENZINI, Ralf RIEDEL, Alexander G. MERZHANOV and Chang-Chun GE
Pages
47-51
DOI
10.4028/www.scientific.net/AST.63.47
Citation
H. Nakano, Y. Suyama, "In Situ TEM Observation of Crystallization Process for LiNbO3 and NaNbO3", Advances in Science and Technology, Vol. 63, pp. 47-51, 2010
Online since
October 2010
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$32.00
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