Rapid synthesis and structural analysis of Li–Nb–Ti–O solid solutions with superstructure by millimeter-wave heating

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概要

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• We have succeeded in synthesizing Li1+x−yNb1−x−3yTix+4yO3 solid solutions (0.11 ≤ x ≤ 0.18, 0 ≤ y ≤ 0.09) having a superstructure by millimeter-wave heating for only 1 h. Synthesizing temperatures were attempted in the range from 873 to 1273 K. A homogeneous LNT solid solution with a superstructure was formed above 1173 K. Such LNT solid solutions were characterized using X-ray diffraction, a scanning electron microscope, and a transmission electron microscope (TEM) from micro-scale to nano-scale. Element analysis revealed that the superstructure was formed by periodical insertion of intergrowth layers with a high concentration of Ti ions. The structural stability of the LNT solid solution was estimated by a first-principles calculation. The results revealed that the structure was stable due to the formation of the superstructure, which is composed through an anisotropic arrangement of the Ti ions.

• 公益社団法人 日本セラミックス協会の論文

著者

• NAKANO Hiromi

  Toyohashi University of Technology

• Nakano Hiromi

  Electron Microscope Laboratory Faculty Of Science And Technology Ryukoku University

• Yuasa Motohiro

  Department Of Energy Science And Technology Graduate School Of Energy Science Kyoto University

• SAJI Tasaburo

  MSP Corp.

• YUASA Motohiro

  Kyoto University

• MIYAKE Syoji

  MSP Corp.

• MABUCHI Mamoru

  Kyoto University

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