| 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
|
