Anomalous ultrasonic absorption in solid state ionic conductor
| Project/Area Number |
08650067
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Applied physics, general
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| Research Institution | Ehime University |
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Principal Investigator |
INOUE Naoki Ehime University Faculty of Science Professor, 理学部, 教授 (50110771)
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| Co-Investigator(Kenkyū-buntansha) |
IIDA Shinji Ehime University Faculty of Science Associate Prof., 理学部, 助教授 (60183737)
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| Project Period (FY) |
1996 – 1997
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| Project Status |
Completed (Fiscal Year 1997)
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| Budget Amount *help |
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1997: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1996: ¥1,600,000 (Direct Cost: ¥1,600,000)
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| Keywords | Solid Electrolyte / Ultrasonic Absorption / Ionic Conduction / Phase Transition |
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| Research Abstract |
Solid solution Na_yK1_<-y>Na1.4Zr1.3OMgo0.7 (PO4) 3 was prepared between KNa1.4Zr1.3Mg0.7 (PO4) 3 and Na2.4Zr1.3Mg0.7 (PO4) 3 with NASICON type structure. Cationic subsitution improved the conductivity which reached a maximum for y=0.7. For each compositions, the activation energy was obtained from th Arrhenius plots, and showed fairly constant against y. Hexagonal parameters a and c were obtained by X-ray diffraction. The a parameter was fairly constant and the b nonlinear behavior against y. These results are correlated with structural features and conductivity data. The solid solution of PbBr2-CuBr has a high electric conductivity above 150ﾟC.The frequency and temperature dependences of complex dielectric constants have been investigated in the concentration of x=0.01-0.3. They exhibited a strong dielectric relaxation caused by the ionic conducrion. Ultrasonic absorption has been measured in the temperature range from 30 to 200ﾟC.They showed a distinct peak at about 170ﾟC depending on the concentration. Using the Debye relaxation, the excess absorption was explained as transition of copper ions between two sites.
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Report
(3 results)
Research Products
(13 results)
