Na+ ion conductivity and crystallographic cell characterization in the Hf-nasicon system Na1+xHf2SixP3-xO12

E. M. Vogel; R. J. Cava; E. Rietman

doi:10.1016/0167-2738(84)90002-X

Na⁺ ion conductivity and crystallographic cell characterization in the Hf-nasicon system Na_1+xHf₂Si_xP_3-xO₁₂

E. M. Vogel, R. J. Cava, E. Rietman

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49 Scopus citations

Abstract

We have measured the effect of varying the mobile ion concentration on the sodium ion conductivity in the Hf-Nasicon system, Na_1+xHf₂Si_xP_3-xO₁₂, for 1.4 ≤ x ≤ 2.8. The conductivity is greatest for Na_3.2Hf₂Si_2.2 P_0.8O₁₂: σ_25°C = 2.3 × 10^-3 (ω cm)^-1, and σ_250°C = 1.7 × 10^-1 (ω cm)^-1. These values are approximately 50% greater and worse, respectively, than the values reported for the best Zr-Nasicon. We have characterized the variation of lattice parameters with composition and found the behavior to be similar to that of Zr-Nasicon. A small distortion from rhombohedral to monoclinic symmetry occurs for compositions 1.8 ≤ x ≤ 2.2.

Original language	English (US)
Pages (from-to)	1-6
Number of pages	6
Journal	Solid State Ionics
Volume	14
Issue number	1
DOIs	https://doi.org/10.1016/0167-2738(84)90002-X
State	Published - Sep 1984
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Chemistry
General Materials Science
Condensed Matter Physics

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10.1016/0167-2738(84)90002-X

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title = "Na+ ion conductivity and crystallographic cell characterization in the Hf-nasicon system Na1+xHf2SixP3-xO12",

abstract = "We have measured the effect of varying the mobile ion concentration on the sodium ion conductivity in the Hf-Nasicon system, Na1+xHf2SixP3-xO12, for 1.4 ≤ x ≤ 2.8. The conductivity is greatest for Na3.2Hf2Si2.2 P0.8O12: σ25°C = 2.3 × 10-3 (ω cm)-1, and σ250°C = 1.7 × 10-1 (ω cm)-1. These values are approximately 50% greater and worse, respectively, than the values reported for the best Zr-Nasicon. We have characterized the variation of lattice parameters with composition and found the behavior to be similar to that of Zr-Nasicon. A small distortion from rhombohedral to monoclinic symmetry occurs for compositions 1.8 ≤ x ≤ 2.2.",

author = "Vogel, {E. M.} and Cava, {R. J.} and E. Rietman",

year = "1984",

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T1 - Na+ ion conductivity and crystallographic cell characterization in the Hf-nasicon system Na1+xHf2SixP3-xO12

AU - Vogel, E. M.

AU - Cava, R. J.

AU - Rietman, E.

PY - 1984/9

Y1 - 1984/9

N2 - We have measured the effect of varying the mobile ion concentration on the sodium ion conductivity in the Hf-Nasicon system, Na1+xHf2SixP3-xO12, for 1.4 ≤ x ≤ 2.8. The conductivity is greatest for Na3.2Hf2Si2.2 P0.8O12: σ25°C = 2.3 × 10-3 (ω cm)-1, and σ250°C = 1.7 × 10-1 (ω cm)-1. These values are approximately 50% greater and worse, respectively, than the values reported for the best Zr-Nasicon. We have characterized the variation of lattice parameters with composition and found the behavior to be similar to that of Zr-Nasicon. A small distortion from rhombohedral to monoclinic symmetry occurs for compositions 1.8 ≤ x ≤ 2.2.

AB - We have measured the effect of varying the mobile ion concentration on the sodium ion conductivity in the Hf-Nasicon system, Na1+xHf2SixP3-xO12, for 1.4 ≤ x ≤ 2.8. The conductivity is greatest for Na3.2Hf2Si2.2 P0.8O12: σ25°C = 2.3 × 10-3 (ω cm)-1, and σ250°C = 1.7 × 10-1 (ω cm)-1. These values are approximately 50% greater and worse, respectively, than the values reported for the best Zr-Nasicon. We have characterized the variation of lattice parameters with composition and found the behavior to be similar to that of Zr-Nasicon. A small distortion from rhombohedral to monoclinic symmetry occurs for compositions 1.8 ≤ x ≤ 2.2.

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Na⁺ ion conductivity and crystallographic cell characterization in the Hf-nasicon system Na_1+xHf₂Si_xP_3-xO₁₂

Abstract

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