NASICON solid electrolytes part III: Sodium conductivity enhancement along domain and grain boundaries
1986; Elsevier BV; Volume: 21; Issue: 2 Linguagem: Inglês
10.1016/0025-5408(86)90201-1
ISSN1873-4227
AutoresKlaus‐Dieter Kreuer, Heinz Kohler, U. Warhus, H. Schulz,
Tópico(s)Thermal Expansion and Ionic Conductivity
ResumoBulk, grain and domain boundary sodium ion conductivity data are presented for NASICON single crystals and ceramics of composition Na1+x+4yZr2−ySixP3−xO12 (x=0–3, y=0−0.2). For silicate rich compositions the "crystals" are built out of domains and the conductance of the resulting domain boundaries are shown to determine the macroscopically observed conductivity. Grain boundaries in ceramics behave in a similar way. A structural explanation of the observed phenomena is suggested.
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