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Effect of Homovalent Framework Cation Substitutions on the Sodium Ion Conductivity in Na 3 Zr 2 Si 2 PO 12
Author(s) -
Cava R. J.,
Vogel Eva M.,
Johnson David W.
Publication year - 1982
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1982.tb10526.x
Subject(s) - isostructural , ion , sodium , conductivity , diffusion , chemistry , electrical resistivity and conductivity , inorganic chemistry , ion transporter , analytical chemistry (journal) , materials science , crystallography , thermodynamics , crystal structure , physics , organic chemistry , chromatography , electrical engineering , engineering
The reported activation volume for sodium ion transport in the fast‐ion conductor Na 3 Zr 2 Si 2 PO 12 is surprisingly large. Therefore, attempts were made to alter the size of the diffusion channels through partial substitution of As, Ge, Ti, Th, and Hffor the framework cations to decrease geometric structural hinderance of the diffusion process. Sodium ion conductivity is improved at temperatures below 200°C far the Hf substitutions. The existence and electrical properties of the apparently isostructural Na 3 Hf 2 Si 2 PO 12 , which has a room‐temperature conductivity of 1.0Ω10 −3 Ω cm −1 , are reported.