Study of proton diffusion in NH+4 - H3O+ beta" -alumina using a pulsed, field-gradient NMR method

Y. T. Tsai*, S. Smoot, D. H. Whitmore, John C. Tarczon, W. P. Halperin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


Diffusion of protons in single crystals of the fast protonic conductor NH+4-H3O+ beta" alumina (nominal composition: (NH+4)1.00(H3O+) 0.85Al10.15O17) has been investigated over the temperature range 336-451 K with the aid of a pulsed, field-gradient NMR technique. The temperature-dependence of the proton diffusion coefficient, D1H, is given by: D1H(cm2s-1)=(6.756+ 2.077- 1.588)x 10-5exp -(0.202 ± 0.009 eV/kT) Comparison is made between these diffusion results and protonic conductivities measured within the same temperature range on the identical crystals used in the diffusion experiments. Implications of these results are briefly discussed in terms of possible mechanistic processes for proton motion in this and related compounds.

Original languageEnglish (US)
Pages (from-to)1033-1040
Number of pages8
JournalSolid State Ionics
Issue numberPART 2
StatePublished - Dec 1983

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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