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RESEARCH PRODUCT
Synthesis and structural and ionic conductivity studies of Na2ZrSi4O11
Jekabs GrinsG. VitinsTom Hörlinsubject
Arrhenius equationChemistryAnalytical chemistryMineralogyGeneral ChemistryActivation energyTriclinic crystal systemCondensed Matter PhysicsIonsymbols.namesakesymbolsIonic conductivityGeneral Materials SciencePowder diffractionMonoclinic crystal systemDiffractometerdescription
The compound Na 2 ZrSi 4 O 1 1 has been prepared both by solid state synthesis and by the sol-gel technique via alkoxides. The structure of Na 2 ZrSi 4 O 11 was investigated by the Rietveld method using X-ray diffractometer data. The powder diffraction data show evidence for a triclinic distortion of the basic monoclinic structure. The ionic conductivity has been determined in the temperature interval 130-560°C using a.c. impedance measurements. The Na + ion mobility is limited, with E a =1.04 eV and σ(300°C)= 2-9 10 7 S/cm. Samples with Ta partially substituted for Zr, according to the formula Na 2-x (Zr 1-x Ta x )Si 4 O 11 with x ≤0.2, showed the same evidence for a triclinic distortion. They had lower E a values 0.75 eV) but only slightly higher conductivities at 300°C.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1996-07-01 | Solid State Ionics |