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Quasielastic Neutron Scattering and Solid State Diffusion$
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Rolf Hempelmann

Print publication date: 2000

Print ISBN-13: 9780198517436

Published to Oxford Scholarship Online: January 2010

DOI: 10.1093/acprof:oso/9780198517436.001.0001

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Solid ionic conductors

Solid ionic conductors

(p.264) 12 Solid ionic conductors
Quasielastic Neutron Scattering and Solid State Diffusion

Rolf Hempelmann

Oxford University Press

This chapter presents incoherent QENS studies performed on Li+, Na+, H-, and Cl- ions. Purely coherent QENS concerns F- and O2- conductors, whereas for Ag+ a mixture of coherent and incoherent QENS prohibits quantitative data evaluation. On the other hand, AgI is one of the best solid ionic conductors, and QENS studies are performed and combined with impedance spectroscopy at high frequencies. For this system, the well-known jump relaxation model is derived. Na+ motion in β-Al2O3 is investigated by QENS in detail. Much effort has been spent on Li+ diffusion motivated by applications of Li in batteries. For anionic conductors, the system best investigated by means of QENS is Cl- diffusion in SrCl2.

Keywords:   quasielastic neutron scattering, anionic conductor, solid ionic conductor, impedance spectroscopy, jump relaxation model

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