Solid-State Ionics-Mixed Ionic and Electronic Conduction in Ag[sub 2]Se-Ag[sub 3]PO[sub 4] Solid Solutions

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Abstract
New solid solutions, the conduction in which is partly ionic and partlly‐ electronic, have been prepared in the system. Solutions containing have the structure and high ionic conductivity at room temperature. For example, has an ionic conductivity of 0.13 (ohm‐cm)−1 at 25°C. The electronic conductivity and Hall coefficient have been measured as a function of the cation‐to‐ anion ratio. The excess electron concentration varies linearly with the change in the cation‐to‐anion ratio. The solid solution containing which has been equilibrated with metallic silver has an excess electron concentration of at 18°C. Coulometric titration, carried out with the galvanic cell gives the ratio of the effective mass to the free electron mass. At constant temperature, the effective mass increases with increasing electron concentration.

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