Nasicon solid electrolytes. Part II: X-ray diffraction experiments on sodium-zirconium-phosphate single crystals at 295K and at 993K

Journal Article · Wed Jan 01 00:00:00 EST 1986 · Mater. Res. Bull.; (United States)

DOI:https://doi.org/10.1016/0025-5408(86)90025-5· OSTI ID:6130045

Kohler, H; Schulz, H

The structure of an end member (x=0) of the NASICON solid solution system Na/sub 1//sub+/subX/sub+/sub-/subYZr/sub 2//sub-/subYSi/subXP/sub 3//sub-/subXO/sub 12/, 0 less than or equal to x less than or equal to 3, 0 less than or equal to y less than or equal to 1 was investigated at room temperature and at 993K. The authors present a model which prompts that both effects are correlated. The occupancy of the Na2 site - not significant at room temperature - was refined to about 10% at 993K. The results from both measurements can be correlated only, if at room temperature Na/sup +/ is located in the interstitial sites and if the transition of these ions to the Na2 site occurs at high temperature. Additional refinement of higher order temperature coefficients of the Na sites at 993K yielded a Na diffusion path Na1-Na2 similar to that found in other NASICON compositions. The height of the effective one particle potential barrier agrees quite well with the activation enthalpy measured on single crystals with impedance methods. Therefore they conclude that in this NASICON composition the main diffusion they process is a bulk process.

• Research Organization: Max-Planck Inst. fur Festkoper-forschung, Stuttgart
• OSTI ID: 6130045
• Journal Information: Mater. Res. Bull.; (United States), Vol. 21:1
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
36 MATERIALS SCIENCE
SILICON PHOSPHATES
INTERSTITIALS
SODIUM PHOSPHATES
SOLID ELECTROLYTES
STRUCTURAL CHEMICAL ANALYSIS
ZIRCONIUM PHOSPHATES
DIFFUSION
ELECTRIC IMPEDANCE
ENTHALPY
HIGH TEMPERATURE
MEDIUM TEMPERATURE
MONOCRYSTALS
OXYGEN
POTENTIALS
SOLID SOLUTIONS
X-RAY DIFFRACTION
ALKALI METAL COMPOUNDS
COHERENT SCATTERING
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
CRYSTALS
DIFFRACTION
DISPERSIONS
ELECTROLYTES
ELEMENTS
IMPEDANCE
MIXTURES
NONMETALS
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
PHYSICAL PROPERTIES
POINT DEFECTS
SCATTERING
SILICON COMPOUNDS
SODIUM COMPOUNDS
SOLUTIONS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
250903* - Energy Storage- Batteries- Materials
Components
& Auxiliaries
360602 - Other Materials- Structure & Phase Studies