| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2012: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
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| Outline of Final Research Achievements |
An oxide ionic diffusivity of oxyapatite-type solid electrolytes was investigated by structure refinement, and electrical conductivity and isotropic diffusion coefficient measurements. It was found that fast ionic conduction along c axis in this oxide was probably done via an interstitialcy mechanism, whereas, conduction perpendicular to the c axis was carried out by vacancy-type diffusion. Since this material has an aisotropic ionic conductivity, oxygen ion diffusivity along each direction was evaluated by using single crystal obtained by the flux method. Although the obtained single crystal showed superior diffusivity along its c axis than that perpendicular to the axis, the diffusion coefficient value was low than expected probably due to impurity located in the specimens
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