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Neutron Diffraction in Superionic Glasses

Published online by Cambridge University Press:  21 February 2011

L. Börjesson ,
M. Elmroth ,
L.M. Torell  and
W.S. Howells
L. Börjesson
Affiliation:
Department of Physics, Chalmers University of Technology, S-412 96 Gothenburg, Sweden
M. Elmroth
Affiliation:
Department of Physics, Chalmers University of Technology, S-412 96 Gothenburg, Sweden
L.M. Torell
Affiliation:
Department of Physics, Chalmers University of Technology, S-412 96 Gothenburg, Sweden
W.S. Howells
Affiliation:
Rutherford-Appleton Laboratory, Chilton, Didcot, Oxon, OXll OQX, U.K
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Abstract

Neutron diffraction experiments have been performed on AgI and LiCI doped borate glasses. The experiments reveal a substantial progressive increase of the medium range structural ordering when Agl is introduced into the glass, which is manifested in the appearance of an intense diffraction peak at anomalously low Q-values (0=0.8 Å−1). The observation might be attributed either to density deficits within the boron-oxygen network or to the presence of small clusters of AgI. The conduction path model proposed to explain the high ion conductivity may therefore hold for the AgI doped glasses. In contrast, no additional medium range ordering can be observed when LiCI is used as the dopant salt, which casts some doubts on the microdomain model as an explanation of the high ionic conductivity in superionic glasses.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 135: Symposium M – Solid State Ionics I , 1988 , 245
Copyright
Copyright © Materials Research Society 1989

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