Dynamics investigations of the proton conductor 12-tungstophosphoric acid by neutron scattering

1994 ◽  
Vol 75 (1-4) ◽  
pp. 285-289
Author(s):  
M. Davidović ◽  
N. Tjapkin ◽  
U. B. Mioč ◽  
Ph. Colomban
Keyword(s):  
Neutron Scattering ◽  
Proton Conductor ◽  
Tungstophosphoric Acid

Reorientational motions of hydrogenic species in 12-tungstophosphoric acid 14-hydrate: a neutron scattering study

1991 ◽  
Vol 1 (4) ◽  
pp. 685 ◽  
Author(s):  
Robert C. T. Slade ◽  
Gillian P. Hall ◽  
Helen A. Pressman ◽  
Ian M. Thompson
Keyword(s):  
Neutron Scattering ◽  
Tungstophosphoric Acid ◽  
Scattering Study ◽  
Neutron Scattering Study

Quasielastic thermal neutron scattering experiment on the proton conductor SrCe0.95Yb0.05H0.02O2.985

1996 ◽  
Vol 86-88 ◽  
pp. 621-628 ◽  
Author(s):  
Th. Matzke ◽  
U. Stimming ◽  
Ch. Karmonik ◽  
M. Soetratmo ◽  
R. Hempelmann ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Thermal Neutron ◽  
Proton Conductor ◽  
Scattering Experiment ◽  
Neutron Scattering Experiment ◽  
Thermal Neutron Scattering

Proton Diffusion in Strontium Cerate Ceramics studied by Quasielastic Neutron Scattering and Impedance Spectroscopy

1995 ◽  
Vol 50 (6) ◽  
pp. 539-548 ◽  
Author(s):  
Ch. Karmonik ◽  
R. Hempelmann ◽  
Th. Matzke ◽  
T. Springer
Keyword(s):  
Diffusion Coefficient ◽  
Impedance Spectroscopy ◽  
Neutron Scattering ◽  
Elevated Temperatures ◽  
Diffusion Mechanism ◽  
Proton Conductor ◽  
Proton Diffusion ◽  
Quasielastic Neutron ◽  
Quasielastic Neutron Scattering ◽  
Strontium Cerate

Abstract Perovskite structured strontium cerate doped with ytterbium and water, e.g. SrCe0.95Yb0.05 H0.02O2.985, is a well known proton conductor at elevated temperatures. We have studied its proton conductivity or diffusivity, respectively, by impedance spectroscopy, IS, and by quasielastic neutron scattering, QENS. While the former method yields a macroscopic proton diffusion coefficient, the latter method allows to elucidate the microscopic proton diffusion mechanism. It consists of a sequence of free diffusion and trapping/escape events with the Yb3+ ions acting as trapping centers. The self-diffusion coefficient obtained with QENS agrees with the conductivity diffusion coefficient obtained with IS.

scholarly journals Proton dynamics of two-dimensional oxalate-bridged coordination polymers

2014 ◽  
Vol 16 (32) ◽  
pp. 17295-17304 ◽  
Author(s):  
Satoshi Miyatsu ◽  
Maiko Kofu ◽  
Atsushi Nagoe ◽  
Takeshi Yamada ◽  
Masaaki Sadakiyo ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Coordination Polymers ◽  
Conduction Mechanism ◽  
Proton Conductor ◽  
Proton Conduction ◽  
Two Dimensional ◽  
Quasielastic Neutron ◽  
New Type ◽  
Proton Dynamics ◽  
Quasielastic Neutron Scattering

The dynamics of H2O molecules and NH4+ ions in a new type of crystalline proton conductor (NH4)2(adp)[Zn2(ox)3]·3H2O has been investigated by quasielastic neutron scattering techniques to elucidate the proton conduction mechanism.

Local atomic structure of relaxor ferroelectric solids studied by pulsed neutron scattering

1994 ◽  
Vol 52 ◽  
pp. 554-555
Author(s):  
T. Egami ◽  
H. D. Rosenfeld ◽  
S. Teslic
Keyword(s):  
Neutron Scattering ◽  
Atomic Structure ◽  
Argonne National Laboratory ◽  
Relaxor Ferroelectrics ◽  
Relaxor Ferroelectric ◽  
Crystallographic Structure ◽  
Chemical Inhomogeneity ◽  
Distribution Analysis ◽  
Ferroelectric Transition ◽  
Pulsed Neutron

Relaxor ferroelectrics, such as Pb(Mg1/3Nb2/3)O3 (PMN) or (Pb·88La ·12)(Zr·65Ti·35)O3 (PLZT), show diffuse ferroelectric transition which depends upon frequency of the a.c. field. In spite of their wide use in various applications details of their atomic structure and the mechanism of relaxor ferroelectric transition are not sufficiently understood. While their crystallographic structure is cubic perovskite, ABO3, their thermal factors (apparent amplitude of thermal vibration) is quite large, suggesting local displacive disorder due to heterovalent ion mixing. Electron microscopy suggests nano-scale structural as well as chemical inhomogeneity.We have studied the atomic structure of these solids by pulsed neutron scattering using the atomic pair-distribution analysis. The measurements were made at the Intense Pulsed Neutron Source (IPNS) of Argonne National Laboratory. Pulsed neutrons are produced by a pulsed proton beam accelerated to 750 MeV hitting a uranium target at a rate of 30 Hz. Even after moderation by a liquid methane moderator high flux of epithermal neutrons with energies ranging up to few eV’s remain.

Molecular dynamics of cyclohexane guest molecules in the cyclohexane/thiourea inclusion compound: an incoherent quasielastic neutron scattering investigation

1998 ◽  
Vol 93 (4) ◽  
pp. 545-554 ◽  
Author(s):  
MATTHEW JONES ◽  
FRANCOIS GUILLAUME ◽  
KENNETH HARRIS ◽  
ABIL ALIEV ◽  
PASCALE GIRARD ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Neutron Scattering ◽  
Inclusion Compound ◽  
Guest Molecules ◽  
Quasielastic Neutron ◽  
Quasielastic Neutron Scattering
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