scholarly journals IONIC CONDUCTIVITY MEASUREMENTS OF BARIUM FLUORIDE SINGLE CRYSTALS

1976 ◽  
Vol 37 (C7) ◽  
pp. C7-337-C7-341 ◽  
Author(s):  
V. M. CARR ◽  
A. V. CHADWICK ◽  
D. R. FIGUEROA
Keyword(s):  
Ionic Conductivity ◽  
Single Crystals ◽  
Barium Fluoride ◽  
Conductivity Measurements

IONIC CONDUCTIVITY OF POTASSIUM BROMIDE CRYSTALS

1964 ◽  
Vol 42 (11) ◽  
pp. 2195-2216 ◽  
Author(s):  
J. Rolfe
Keyword(s):  
Ionic Conductivity ◽  
Single Crystals ◽  
High Temperatures ◽  
Potassium Carbonate ◽  
Calcium Ions ◽  
Transport Number ◽  
Potassium Bromide ◽  
Negative Ion ◽  
Conductivity Measurements ◽  
Positive Ion

The conductivity of single crystals of potassium bromide has been measured as a function of temperature. Potassium carbonate was found to be sufficiently soluble at high temperatures in KBr to cause a conductivity due to negative ion vacancies. The ionic conductivity parameters of KBr were calculated from conductivity measurements on crystals containing known concentrations of potassium carbonate and calcium bromide without recourse to transport number experiments. A simple theory of association was found to be adequate to describe the interaction between calcium ions and positive ion vacancies. The solubility of free divalent impurities in KBr was also calculated from conductivity measurements. The following enthalpy values were found: for formation of a pair of Schottky vacancies, 2.53 eV; for the motion of positive ion vacancies, 0.665 eV; for the motion of negative ion vacancies, 0.87 eV; for the association of calcium ions and positive ion vacancies, 0.46 eV.

Characterization of New Ionically Conducting Peo-Based Networks by Diffusion, Elasticity Modulus and Ionic Conductivity Measurements

1992 ◽  
Vol 293 ◽  
Author(s):  
Herve Cheradame ◽  
F. Desbat ◽  
P. Mercier-Niddam ◽  
S. Boileau
Keyword(s):  
Diffusion Coefficient ◽  
Ionic Conductivity ◽  
Elasticity Modulus ◽  
Sol Gel ◽  
Cation Transport ◽  
Lithium Cation ◽  
Conductivity Measurements ◽  
Conducting Materials ◽  
Diffusion Studies

AbstractIonically conducting materials containing PEO were prepared from telechelic di(methyl-diethoxy-silane) PEO, synthesized by the hydrosilylation of telechelic diallyl-PEO with methyldiethoxysilane. The network is obtained by the usual sol-gel chemistry. Then, it is filled with LiClO4 by diffusion of the salt and further drying. A comparison is made with the same kind of materials crosslinked using urethane chemistry. Diffusion studies show that the diffusion coefficient of solvent is similar for both types of materials, whilst the ionic conductivity is higher for the networks crosslinked with siloxane bonds. An experiment of diffusion of LiClO4 without solvent showed that this salt has a diffusion coefficient of the order of 2.10-8 cm2.sec-1 at 34°C. The conductivity calculated from this determination is compatible with the mechanism of lithium cation transport by the diffusion of salt molecules. Elasticity modulus measurements show that the salt aggregates are essentially located within the crosslinks at low concentration, but also in the PEO chains for salt concentrations higher than 1 mol/l.

Influence of purity of NdF3 single crystals on their ionic conductivity

2012 ◽  
Vol 57 (3) ◽  
pp. 461-462 ◽  
Author(s):  
N. I. Sorokin ◽  
Z. I. Zhmurova ◽  
E. A. Krivandina ◽  
B. P. Sobolev
Keyword(s):  
Ionic Conductivity ◽  
Single Crystals

scholarly journals Ionic Conductivity and Phase Transition Behaviour in 4AgI-(1-)-2CuI System

2008 ◽  
Vol 2008 ◽  
pp. 1-4 ◽  
Author(s):  
Mohammed Hassan ◽  
Rfi Rafiuddin
Keyword(s):  
Phase Transition ◽  
Ionic Conductivity ◽  
Binary System ◽  
High Temperature Phase ◽  
Temperature Phase ◽  
Conductivity Measurements ◽  
Temperature Dependent ◽  
X Ray ◽  
Dsc Curves ◽  
Transition Behaviour

Samples of general formula 4AgI-(1-)-2CuI, , have been prepared and investigated by XRD, DSC, and temperature-dependent conductivity studies. X-ray diffractograms showed the presence of binary system consisting of AgI and in the sample . Cu-substituted samples showed very similar diffractograms to that of the pure compound which indicates that no effect for the substitution on the nature of the binary system. DSC curves showed the presence of phase transition whose temperature increased with ratio in the system. Ionic conductivity measurements confirmed the occurrence of the phase transition and showed that the high temperature phase is superionic conducting, whose conductivity increases with the increasing amount in the system.

scholarly journals Structural relaxation in AgPO3 glass followed by in situ ionic conductivity measurements

2016 ◽  
Vol 437 ◽  
pp. 43-47 ◽  
Author(s):  
C.B. Bragatto ◽  
D.R. Cassar ◽  
O. Peitl ◽  
J.-L. Souquet ◽  
A.C.M. Rodrigues
Keyword(s):  
Ionic Conductivity ◽  
Structural Relaxation ◽  
Conductivity Measurements

Ionic conductivity in nanocrystalline Gd doped ceria

2008 ◽  
Vol 1122 ◽  
Author(s):  
Gianguido Baldinozzi ◽  
David Simeone ◽  
Dominique Gosset ◽  
Mickael Dollé ◽  
Georgette Petot-Ervas
Keyword(s):  
Grain Size ◽  
Ionic Conductivity ◽  
Sol Gel ◽  
Doped Ceria ◽  
Narrow Size Distribution ◽  
Conductivity Measurements ◽  
X Ray Diffraction ◽  
X Ray ◽  
Grain Sizes ◽  
The Impact

AbstractWe have synthesized Gd-doped ceria polycrystalline samples (5, 10, 15 %mol), having relative densities exceeding 95% and grain sizes between 30 and 160 nm after axial hot pressing (750 °C, 250 MPa). The samples were prepared by sintering nanopowders obtained by sol-gel chemistry methods having a very narrow size distribution centered at about 16 nm. SEM and X-ray diffraction were performed to characterize the sample microstructures and to assess their structures. We report ionic conductivity measurements using impedance spectroscopy. It is important to investigate the properties of these systems with sub-micrometric grains and as a function of their composition. Therefore, samples having micrometric and nanometric grain sizes (and different Gd content) were studied. Evidence of Gd segregation near the grain boundaries is given and the impact on the ionic conductivity, as a function of the grain size and Gd composition, is discussed and compared to microcrystalline samples.

Ionic conductivity of zirconia based ceramics from single crystals to nanostructured polycrystals

2001 ◽  
Vol 21 (10-11) ◽  
pp. 1837-1841 ◽  
Author(s):  
A. Cheikh ◽  
A. Madani ◽  
A. Touati ◽  
H. Boussetta ◽  
C. Monty
Keyword(s):  
Ionic Conductivity ◽  
Single Crystals
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