Electrical Conductivity of Some Uranium Oxides in the Composition Range UO3—U3 O8_2

1981 ◽  
Vol 28 (2) ◽  
Author(s):  
M. A. KHILLA ◽  
S. A. EL -FEKEY ◽  
M. EL-MAMOON YAHIA
Keyword(s):  
Electrical Conductivity ◽  
Composition Range ◽  
Uranium Oxides

Electrical Conductivity of Molten LaBr3 and LaBr3–MBr Binary Mixtures

2005 ◽  
Vol 60 (1-2) ◽  
pp. 75-80 ◽  
Author(s):  
B. Ziolek ◽  
L. Rycerz ◽  
S. Gadzurica ◽  
E. Ingier-Stocka ◽  
M. Gaune-Escardb
Keyword(s):  
Electrical Conductivity ◽  
Complex Formation ◽  
Alkali Metal ◽  
Binary Mixtures ◽  
Composition Range ◽  
Arrhenius Equation

The electrical conductivity of liquid binary LaBr3-alkali metal bromide mixtures was measured as function of the temperature over the whole composition range. Prior to these measurements, LaBr3 was reinvestigated because of the discrepancies in the literature values. The classical Arrhenius equation did not stand for any individual mixture. These results were discussed in terms of complex formation in the melts.

Transition to Semiconducting Characteristics in Liquid Alkalimetal-Antimony-Alloys

1982 ◽  
Vol 37 (6) ◽  
pp. 587-593 ◽  
Author(s):  
H. Redslob ◽  
G. Steinleitner ◽  
W. Freyland
Keyword(s):  
Electrical Conductivity ◽  
Magnetic Susceptibility ◽  
Molar Volume ◽  
Composition Dependence ◽  
Composition Range ◽  
Liquid Alloys ◽  
Wide Composition Range ◽  
Alloy Semiconductors ◽  
Antimony Alloys ◽  
Semiconducting Behavior

Abstract The paper reports new measurements of the electrical conductivity, thermoelectric power, magnetic susceptibility, and molar volume of liquid Cs-Sb alloys and, partly, Na-Sb and K-Sb alloys. From the temperature and composition dependence of the electronic properties it is concluded that typical semiconducting behavior similar to liquid chalgogen based alloy semiconductors exists over a wide composition range. The change in bonding for 0.25≦XSb≦0.5 is qualitatively discussed and it is found that these liquid alloys are not essentially ionic in character.

Transport properties and the structure of vanadium phosphate glasses

1977 ◽  
Vol 55 (5) ◽  
pp. 436-441 ◽  
Author(s):  
B. D. Jordan ◽  
C. Calvo
Keyword(s):  
Electrical Conductivity ◽  
Seebeck Coefficient ◽  
Composition Range ◽  
Phosphate Glasses ◽  
Vanadium Phosphate ◽  
Jump Frequency ◽  
X Ray ◽  
Concentration Variable ◽  
Hopping Model ◽  
Vanadium Ion

The adiabatic hopping model for the electrical conductivity of the vanadium phosphate glasses, V1+xP1−xO5−c/2, is examined in terms of their structures as derived from recent X-ray studies. These indicate that the relevant concentration variable for rationalizing the Seebeck coefficient data is c, the fraction of non-tetrahedral vanadium ion sites which are polarons. The polarons interlayer coordination number is 3. The average hopping distance varies by only 5% for 0 ≤ x ≤ 1. The experimental conductivities compared with[Formula: see text]suggest that n is near 3 and that the jump frequency v0 varies by nearly a factor of 3 over the composition range.

The density, electrical conductivity, freezing point, and viscosity of mixtures of trifluoromethanesulfonic acid and water

1978 ◽  
Vol 56 (13) ◽  
pp. 1832-1835 ◽  
Author(s):  
Ronald Corkum ◽  
John Milne
Keyword(s):  
Electrical Conductivity ◽  
Composition Range ◽  
Freezing Point ◽  
Specific Conductivity ◽  
Trifluoromethanesulfonic Acid ◽  
Maximum Deviation ◽  
Incongruent Melting ◽  
Point Curve ◽  
The Ideal

Density, viscosity, specific conductivity, and freezing point measurements over the whole composition range of water–trifluoromethanesulfonic acid mixtures are reported. A maximum in viscosity and minimum in specific conductivity are observed at the composition corresponding to the monohydrate, H3O+SO3CF3−, and a maximum deviation from the ideal density is found at the composition corresponding to H5O2+SO3CF3−. The freezing point curve gives evidence for four hydrates with 1:1, 2:1, 4:1, and 6:1 water/trifluoromethanesulfonic acid mole ratios. An incongruent melting hydrate, probably 2:1 acid to water mole ratio is also indicated.

Electrical Conductivity of Molten Binary Ndbr3 – Alkali Bromide Mixtures

2004 ◽  
Vol 59 (1-2) ◽  
pp. 77-83 ◽  
Author(s):  
S. Gadzuric ◽  
E. Ingier-Stocka ◽  
L. Rycerz ◽  
M. Gaune-Escard
Keyword(s):  
Electrical Conductivity ◽  
Complex Formation ◽  
Alkali Metal ◽  
Reference Values ◽  
Composition Range ◽  
Arrhenius Equation ◽  
Conductivity Data ◽  
Electrical Conductivity Data

Electrical conductivity of liquid binary NdBr3 - alkali metal bromide mixtures was measured as a function of temperature over the whole composition range. Prior to these measurements, NdBr3 and alkali bromides were reinvestigated: a new assessment of literature data was made because of the discrepancy with reference values on NdBr3, LiBr and CsBr. The classical Arrhenius equation describes well our electrical conductivity data for mixtures. These results are discussed in terms of complex formation in the melts.

scholarly journals Effect of chemical composition on the microstructure, hardness and electrical conductivity profiles of the Bi-Ge-In alloys

10.30544/561 ◽  
2020 ◽  
Vol 26 (4) ◽  
pp. 413-429
Author(s):  
Milena Premovic ◽  
Aleksandar Djordjevic ◽  
Dusko Minic ◽  
Milan Kolarevic ◽  
Milica Tomovic
Keyword(s):  
Mathematical Model ◽  
Electrical Conductivity ◽  
Composition Range ◽  
Brinell Hardness ◽  
Composition Analysis ◽  
Anova Analysis ◽  
Isothermal Sections ◽  
X Ray ◽  
Energy Dispersion Spectrometry ◽  
Phase Balance

In this study, the microstructure, hardness, and electrical properties of selected ternary Bi-Ge-In alloys were investigated. Isothermal sections of the Bi-Ge-In system at 25, 200, and 300 ° C were extrapolated using optimized thermodynamic parameters from the literature. The used experimental techniques include optical microscopy, X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and energy dispersion spectrometry (EDS), Brinell hardness, and electrical conductivity measurements. The results of EDS phase composition analysis were compared with the calculated isothermal sections and a good overall agreement was reached. The results of the XRD were also in line with the predicted phase balance. By using ANOVA analysis and experimental results of Brinell hardness and electrical conductivity, a mathematical model was suggested for the calculation of these properties along with all composition ranges. The appropriated mathematical model was subsequently used for the prediction of hardness and electrical conductivity throughout the whole composition range.

Electrical Conductivity of Zirconia-Mn Oxide Mixture

1998 ◽  
Vol 548 ◽  
Author(s):  
J. H. Kim ◽  
G. M. Choi
Keyword(s):  
Activation Energy ◽  
Solid Solution ◽  
Electrical Conductivity ◽  
Composition Range ◽  
Two Phase ◽  
Oxide Mixture ◽  
Wide Composition Range ◽  
Hysteresis Behavior ◽  
Mn Oxide ◽  
Form Solid Solution

ABSTRACTMn2O3 was added to YSZ (8 mol% yttria- doped zirconia) either to form solid solution or two-phase (Mn2O3 and Mn2O3 doped-YSZ) mixed-conducting oxide. The electrical conductivity was measured between 600 and 1000°C in air using 4-probe d.c. method in a wide composition range to determine composition-dependent conductivity. Up to 12 mol% MnO1.5 addition, the conductivity decreases and the activation energy increases. With further increase of MnO1.5 content, the conductivity of composite begins to increase slowly and then increases rapidly after 30 mol% due to the interconnected, conductive Mn2O3 particles. Above 35 Mol% MnO1.5 content, the activation energy is nearly the same as that of Mn2O3. Hysteresis behavior shown in the conductivity of composite also provides the evidence of percolation by MnO1.5.

scholarly journals Phase Diagram, Caesium-133 NMR Spectra and Electrical Conductivity of the Binary System Caesium and Zinc Butyrates

2000 ◽  
Vol 55 (11-12) ◽  
pp. 895-898
Author(s):  
T. A. Mirnaya ◽  
V. V. Trachevski ◽  
V. S. Dradrakh ◽  
D. V. Bylina
Keyword(s):  
Thermal Analysis ◽  
Phase Diagram ◽  
Electrical Conductivity ◽  
Differential Thermal Analysis ◽  
Binary System ◽  
Nmr Spectra ◽  
Composition Range ◽  
Specific Electrical Conductivity ◽  
Polarization Microscopy ◽  
Smectic Liquid Crystals

Abstract Phase equilibria of non-mesogenic caesium- and zinc-butyrate mixtures were studied by differential thermal analysis and hot stage polarization microscopy. Smectic liquid crystals were found in some composition range. Their appearance is explained by the latent mesomorphism of caesium butyrate. |133Cs NMR spectra and the specific electrical conductivity of the molten mixtures at 155°C were employed to investigate the peculiarities of ionic association and interaction in the melts.

Phase Diagram and Electrical Conductivity of CeBr3-KBr

2007 ◽  
Vol 62 (3-4) ◽  
pp. 197-204
Author(s):  
Leszek Rycerz ◽  
Ewa Ingier-Stocka ◽  
Slobodan Gadzuric ◽  
Marcelle Gaune-Escard
Keyword(s):  
Phase Diagram ◽  
Electrical Conductivity ◽  
Composition Range ◽  
Alkali Metal Halide ◽  
Potassium Bromide ◽  
Specific Electrical Conductivity ◽  
Scanning Calorimetry ◽  
Rich Region ◽  
Congruently Melting ◽  
Lanthanide Halide

This paper continues our research program on lanthanide halide-alkali metal halide systems. Differential scanning calorimetry (DSC) was used to investigate the phase equilibria of the CeBr3-KBr system. This system is characterized by the two congruently melting compounds K3CeBr6 and K2CeBr5 and the three eutectics located at the CeBr3mole fractions 0.193 (837 K), 0.295 (855 K) and 0.555 (766 K). K3CeBr6 forms at 775 K and melts congruently at 879 K with the related enthalpies 54.5 and 41.7 kJ mol−1, respectively. K2CeBr5 melts congruently at 874 K with the enthalpy 82.4 kJ mol−1. The electrical conductivity was measured of all CeBr3-KBr mixtures and of the pure components down to temperatures below solidification. The experimental determinations were conducted over the entire composition range in steps of about 10 mol%. The specific electrical conductivity decrease with increasing CeBr3 concentration, with significantly larger conductivity changes in the potassium bromide-rich region. The results are discussed in terms of possible complex formation.

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