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Electrical Conduction Properties of LaP3O9 Glass and Glass–Ceramics

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Electrical conduction properties of undoped and 1 mol% Sr-doped LaP3O9 glasses and glass–ceramics were investigated over the temperature range of 673–1123 K. Both the materials showed relatively low conductivities in the glassy state. However, the conductivity of the Sr-doped LaP3O9 glass significantly increased with a heat treatment above the crystallization temperature, while the conductivity of the undoped LaP3O9 glass did not improve even after the heat treatment. It was concluded that crystallization of the Sr-doped LaP3O9 glass induced protonic conduction and thus enhanced the conductivity. Electrical conduction properties of the Sr-doped LaP3O9 glass–ceramic fundamentally resembled those of the sintered crystalline Sr-doped LaP3O9.
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Document Type: Research Article

Affiliations: 1: Graduate School of Human and Environmental Studies, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan 2: Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan 3: Graduate School of Energy Science, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan

Publication date: November 1, 2005

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