Recherche de matériauxa`conductivitéionique ame´liore´e de´rivant des hydrurofluorures de calcium CaF2−xHx: conductivite´ ionique des phases Ca1−yNay(F2−xHx)1−y/2 |
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Authors: | Jean-François Brice Re´mi Leveque Pierre Steinmetz |
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Institution: | Laboratoire de Chimie du Solide Mine´ral, Associe´au CNRS N |
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Abstract: | The doping of CaF2?xHx hydridefluorides by aliovalent ions is studied, the aim being the preparation of materials of improved ionic conductivity. It is shown that doping by monovalent Na+ ions is possible. Three hydrogen-rich phases, formulated NayCa1?y(F2?xHx)1?y/2 have been studied. Their conductivity is mainly ionic, but, compared with the same doping in CaF2, the conductivity enhancement is low. This result is interpreted from energetic and structural considerations. |
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