Regular array microstructure of LiNbO3-Li2TiO3 self-organized crystal composites and its formation mechanism

Yo Yamamoto; Jun Ki Chung; Takafumi Kusunose; Tadachika Nakayama; Tohru Sekino; C.J. Kim; Koichi Niihara

doi:10.14853/pcersj.2002F.0.123.0

15th Fall Meeting of The Ceramic Society of Japan

DOI https://doi.org/10.14853/pcersj.2002F.0.123.0

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Host: The Ceramic Society of Japan

Regular array microstructure of LiNbO₃-Li₂TiO₃ self-organized crystal composites and its formation mechanism

Yo Yamamoto, Jun Ki Chung, Takafumi Kusunose, Tadachika Nakayama, Tohru Sekino, C.J. Kim, Koichi Niihara

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Keywords: Lithium niobate, Self-organization, Floating-zone melting, Superstructure, Microstructure, EPMA

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Pages 123

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Abstract

The LiNbO₃-Li₂TiO₃ composite crystal that has self-organized regular array microstructure with superstructure was prepared by using crystal growth method. And its formation mechanisms were investigated with transmission electron microscopy, scanning electron microscopy and electron probe micro analysis. The typical microstructure of obtained composite crystals was consisted of regular array of rod precipitates embedded in matrix. According to result of XRD and EPMA, the matrix phase was identified as phase M, and rod precipitates as Li₂TiO₃ solid solution respectively. The direction of super structure was identical in the longitudinal direction of rod precipitates.

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