ID 74506
Title Transcription
ヒセンケイ キョウメイ ゲンショウ オ リヨウ シタ チョウ イオン ドウデンタイ ノ ブツセイ ソクテイ
Title Alternative
Non-Linear Resonant Ultrasound Measurements on Superionic Conductor
Author
Nakamura, Koichi Department of Physics, Faculty of Engineering, The University of Tokushima Tokushima University Educator and Researcher Directory KAKEN Search Researchers
Michihiro, Yoshitaka Department of Physics, Faculty of Engineering, The University of Tokushima KAKEN Search Researchers
Moriga, Toshihiro Department of Chemical Science and Technology,Faculty of Engineering, The University of Tokushima Tokushima University Educator and Researcher Directory KAKEN Search Researchers
Haraguchi, Masanobu Department of Optical Science and Technology, Faculty of Engineering, The University of Tokushima Tokushima University Educator and Researcher Directory KAKEN Search Researchers
Keywords
Phonon-echo
Ultrasound Measurement
Lithium Ionic Diffusion
Activation Energy
Secondary Battery
Content Type
Departmental Bulletin Paper
Description
Lithium transition metal oxides are attractive as the positive electrode of secondary battery.
In this study, the phonon-echo measurements have been performed to study Li+ ionic motion
in piezoelectric LiNbO3 powder. The phonon-echo is generated by propagating waves coupling
through the anharmonicity of lattice vibrations. The decay time of the echo, T2 is connected
with the internal friction within each particle, which is functional as an acoustic oscillator.
The decrease in T2 observed above 800 K in the polycrystalline powder is explained in terms of
a Debye-type relaxation model based on Li+ ionic motion. The activation energy is estimated
as about 0.93 eV, which is in good agreement with those reported from NMR and ionic
conductivity measurements. The present study indicates that the phonon-echo measurement
is useful to elucidate the ionic motion in ionic conductors.
Journal Title
徳島大学工学部研究報告
ISSN
03715949
NCID
AA1221470X
Volume
51
Published Date
2006
FullText File
language
jpn
departments
Science and Technology