Advertisement

Pramana

, Volume 32, Issue 6, pp 811–820 | Cite as

High resolution magic angle spinning NMR studies of31P and11B in fast ion conducting AgI-Ag2O-P2O5 and AgI-Ag2O-B2O3 glasses

  • M C R Shastry
  • K J Rao
Condensed Matter Physics

Abstract

Silver iodide-based fast ion conducting glasses containing silver phosphate and silver borate have been studied. An attempt is made to identify the interaction between anions by studying the chemical shifts of31P and11B atoms in high resolution (HR) magic angle spinning (MAS) NMR spectra. Variation in the chemical shifts of31P or11B has been observed which is attributed to the change in the partial charge on the31P or11B. This is indicative of the change in the electronegativity of the anion matrix as a whole. This in turn is interpreted as due to significant interaction among anions. The significance of such interaction to the concept of structural unpinning of silver ions in fast ion conducting glasses is discussed.

Keywords

Fast ion conductor chemical shift electronegativity structural unpinning 

PACS Nos

61·16 61·40 66·10 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Anantharaj S, Varma K B R and Rao K J 1988Solid State Ionics 27 5–9CrossRefGoogle Scholar
  2. Chiodelli A, Magistris and Schiraldi A 1974Electrochemica Acta 19 655CrossRefGoogle Scholar
  3. Fyfe C A 1983Solid State NMR for Chemists (Guelph: CNC Press)Google Scholar
  4. Hemalata S, Sarode P R and Rao K J 1983J. Non-Cryst. Solids 54 313CrossRefGoogle Scholar
  5. Kunze D 1973Fast ion transport in solids (ed.) W Van Gool (Amsterdam: North Holland) p. 405Google Scholar
  6. Krogh-Moe J 1965Phys. Chem. Glasses 6 46Google Scholar
  7. Lazzari M, Imazoa I and Tanaka M J 1980J. Non-Cryst. Solids 42 469CrossRefGoogle Scholar
  8. Malugani J P, Wasniewski A, Doreau M, Robert G and Rikabi A 1978Mater. Res. Bull. 13 427CrossRefGoogle Scholar
  9. Minami T, Yakuma Y and Tanaka M 1977aJ. Electrochem. Soc. 124 1659CrossRefGoogle Scholar
  10. Minami T, Takuma Y and Tanaka M 1977bJ. Am. Ceram. Soc. 60 467CrossRefGoogle Scholar
  11. Minami T, Katsuda T and Tanaka M 1980J. Non-Cryst. Solids 42 469CrossRefGoogle Scholar
  12. Minami T, Shimizu T and Tanaka M 1983Solid State Ionics 9 & 10 577CrossRefGoogle Scholar
  13. Prabhakar S, Rao K J and Rao C N R 1987Chem. Phys. Lett. 139 96CrossRefADSGoogle Scholar
  14. Prabhakar S, Rao K J and Rao C N R 1989Spectrochim. Acta (to be published)Google Scholar
  15. Pye L D, Frechette V D and Kreidl N J 1978Borate glass; Structure, Properties, Applications (New York: Plenum Press)Google Scholar
  16. Rao K J 1987Rev. Solid State Sci. 1 55Google Scholar
  17. Sanderson R T 1983Polar covalence (New York: Academic Press) p. 37Google Scholar
  18. Shastry M C R and Rao K J 1989Solid State Ionics (Accepted)Google Scholar
  19. Tuller H L, Button D P and Uhlmann D R 1980J. Non-Cryst. 40 93 (and references therein)CrossRefGoogle Scholar

Copyright information

© the Indian Academy of Sciences 1989

Authors and Affiliations

  • M C R Shastry
    • 1
  • K J Rao
    • 1
  1. 1.Solid State and Structural Chemistry UnitIndian Institute of ScienceBangaloreIndia

Personalised recommendations