Article Dans Une Revue Journal de Physique Année : 1987

Phase transitions and dielectric relaxations in superionic protonic conductor HUP (H3OUO2PO4.3H2O) in the broad frequency range (10-2-1010 Hz)

J.C. Badot
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A. Fourrier-Lamer
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N. Baffier
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Ph. Colomban

Résumé

The dielectric properties of hydrogen uranyle phosphate (HUP = H3 OUO2PO4.3H2O) and its sodium homologous (NaUP = NaUO2PO4, 3 H2O) have been studied between 10-2 and 1010 Hz. The samples are dense polycrystalline pellets sintered under pressure at 25°C. Three or two dipolar relaxations are observed for HUP or NaUP respectively and assigned to protonic species reorientations (H2O, H3O+), to H3O + ions or to ions coupled water molecules jumps. Dipolar relaxation, ferroelectricity and superionic conductivity are discussed.

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jpa-00210559 , version 1 (04-02-2008)

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J.C. Badot, A. Fourrier-Lamer, N. Baffier, Ph. Colomban. Phase transitions and dielectric relaxations in superionic protonic conductor HUP (H3OUO2PO4.3H2O) in the broad frequency range (10-2-1010 Hz). Journal de Physique, 1987, 48 (8), pp.1325-1336. ⟨10.1051/jphys:019870048080132500⟩. ⟨jpa-00210559⟩

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