Li(Fe,Al)<sub>5</sub>O<sub>8</sub>スピネル固溶体の導電率

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  • Conductivity of Li(Fe, Al)<sub>5</sub>O<sub>8</sub> Spinel Solid Solutions
  • Li Fe Al 5O8 スピネル コヨウタイ ノ ドウデンリツ

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The dependence of the conductivity of the Li(FexAl1-x)5O8 solid solution on its composition was investigated. The abrupt increase in the conductivity and decrease in the activation energy were observed between x=0.4 and 0.5 of Li(FexAl1-x)5O8. The composition x=0.415, which corresponds to the percolation threshold expected from the percolation theory, is within this range (x=0.4-0.5). The conductivities of the compositions above the percolation threshold were revealed to increase as (p-pSC)2.0(pSC=0.311). Consequently, the abrupt increase in the conductivity is attributed to the formation of the conducting or percolation path of Fe ions among the B-sites of the spinel.

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