DC electrical conductivity measurements on KCl and KNO3-added MgSO4·7H2O single crystals

2008 ◽  
Vol 403 (1) ◽  
pp. 57-60 ◽  
Author(s):  
C.K. Mahadevan
Keyword(s):  
Electrical Conductivity ◽  
Single Crystals ◽  
Conductivity Measurements ◽  
Dc Electrical Conductivity

PROTON CONDUCTION IN LITHIUM HYDRAZINIUM SULPHATE, Li(N2H6)SO4

1964 ◽  
Vol 42 (10) ◽  
pp. 1871-1878 ◽  
Author(s):  
J. Vanderkooy ◽  
J. D. Cuthbert ◽  
H. E. Petch
Keyword(s):  
Crystal Structure ◽  
Electrical Conductivity ◽  
Single Crystals ◽  
Time Lag ◽  
Proton Conduction ◽  
Hydrogen Gas ◽  
Electrical Charge ◽  
Initial Time ◽  
Conductivity Measurements ◽  
Conduction Process

Electrical conductivity measurements have been made over a range of temperatures on single crystals of lithium hydrazinium sulphate. The d-c. conductivity was found to be markedly anisotropic with the direction of easiest conduction along the ferroelectric c axis. The protonic nature of the current carriers was established in an electrolysis experiment in which the evolution of hydrogen gas was found to be, after an initial time lag, directly proportional to the electrical charge transported across the crystal. The conduction process is discussed in terms of crystal structure and proton reorientations.

Electrical conductivity measurements on pure and amino acids added triglycine sulphate phosphate single crystals

2002 ◽  
Vol 55 (6) ◽  
pp. 394-396 ◽  
Author(s):  
N.P Rajesh ◽  
C Mahadevan ◽  
P Santhana Raghavan ◽  
Yen-Chieh Huang ◽  
P Ramasamy
Keyword(s):  
Amino Acids ◽  
Electrical Conductivity ◽  
Single Crystals ◽  
Conductivity Measurements ◽  
Triglycine Sulphate

scholarly journals Optical and Electrical Conductivity Measurements of GLO Single Crystals for NLO Applications

2012 ◽  
Vol 11 (1) ◽  
pp. 36-39 ◽  
Author(s):  
G. Shankar ◽  
G. Anbazhagan ◽  
P.S. Joseph ◽  
T. Balakrishn
Keyword(s):  
Electrical Conductivity ◽  
Single Crystals ◽  
Conductivity Measurements

Polypyrrole@α-Al2O3 and polypyrrole@CeO2 core-shell hybrid nanocomposites

2017 ◽  
Vol 52 (11) ◽  
pp. 1433-1441 ◽  
Author(s):  
AS Silva ◽  
SM de Souza ◽  
EA Sanches
Keyword(s):  
Electrical Conductivity ◽  
Differential Scanning Calorimetry ◽  
Diffraction Pattern ◽  
Hybrid Nanocomposites ◽  
Core Shell ◽  
Conductivity Measurements ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Dc Electrical Conductivity

PPy@ α-Al2O3 and PPy@CeO2 nanocomposites were synthesized free of acids by in situ polymerization and characterized by X-ray diffraction, scanning electron microscopy, differential scanning calorimetry and DC electrical conductivity measurements. X-ray diffraction pattern of Polypyrrole revealed a semi crystalline structure. The Le Bail method was performed using the X-ray diffraction pattern of polypyrrole and allowed the proposition of the unit cell parameters (P21/c, a = 9.0173 Å, b = 7.1641 Å, c = 6.4184 Å, α = 90°, β = 117.7°, γ = 90°), which is composed by a dimeric molecule disposed along the [001] direction. A cauliflower-like morphology was observed in polypyrrole, which consists of incomplete spheres forming nanoparticle clusters. Core-shell morphology was verified in the nanocomposites consisting of a thin layer of polymer reinforcement disposed over the metal oxides matrices. Differential scanning calorimetry measurements allowed verifying the hydrophobic behavior of the inorganic phase, promoting the repulsion of the internal water molecules out from the polymer phase. Then the initial decomposition temperature of the nanocomposites has become smaller. The polypyrrole electrical conductivity is lower than the nanocomposites and may be related with the absence of hydration water in nanocomposites and also to the surface conductivity due to the thin polymer layer. PPy@ α-Al2O3 and PPy@CeO2 nanocomposites presented DC electrical conductivity 80% higher when compared to the as-synthesized polypyrrole. Thus, the aim of this paper was to characterize structural and morphologically the pure polypyrrole as well as the PPy@α-Al2O3 and PPy@CeO2 nanocomposites and correlate these results with the DC electrical conductivity measurements.

scholarly journals DIELECTRIC MEASUREMENTS ON PURE AND KDP ADDED DISODIUM HYDROGEN PHOSPHATE (DSHP) SINGLE CRYSTALS

2021 ◽  
pp. 12-15
Author(s):  
J. Asbalter ◽  
S. Mugundakumari ◽  
N. Joseph John
Keyword(s):  
Electrical Conductivity ◽  
Single Crystals ◽  
Room Temperature ◽  
Structural Defects ◽  
Conductivity Measurements ◽  
Disodium Hydrogen Phosphate ◽  
Parallel Plate Capacitor ◽  
Dc Conductivities ◽  
Increase With Increase ◽  
Experimental Tool

Electrical conductivity is an elegant experimental tool to probe the structural defects and internal purity of crystalline solids. In the present study we have grown pure and KDP added DSHP single crystals by the slow evaporation method from aqueous solutions at room temperature. Good quality transparent crystals have been obtained. Melting point and density measurements were done. Electrical conductivity measurements were carried out with two frequencies, 100 Hz and 1 kHz at various temperatures ranging from 2 to 30oC by using the parallel plate capacitor method. The present study indicate that the dielectric constant and AC and DC conductivities increase with increase of temperature.

Influence of annealing on the electrical conductivity of single crystals of Cu2O

1970 ◽  
Vol 48 (1) ◽  
pp. 63-69 ◽  
Author(s):  
F. L. Weichman ◽  
R. Kužel
Keyword(s):  
Activation Energy ◽  
Electrical Conductivity ◽  
Low Temperature ◽  
Single Crystals ◽  
Activation Energies ◽  
Conductivity Measurements ◽  
Different Temperatures ◽  
Temperature Activation ◽  
The Stability ◽  
Stability Ranges

A series of conductivity measurements were made on single crystals of Cu2O from 20 to 840 °C to explain the various activation energies which appear at different temperatures and oxygen pressures. Crystals were annealed in the 10−8 and 10−4 Torr region in the stability ranges of Cu2O, Cu, and CuO at various temperatures. For the low-temperature activation energies ranging from 0.60 to 0.26 eV, an excellent agreement with the empirical Meyer–Neldel rule was found. The highest activation energy of 1.12 eV in the 570 to 680 °C range at 10−8 Torr is associated with the boundary between the two stable phases Cu and Cu2O. The changes in defect concentration are ascribed to the mechanism of self-compensation. The energy-level diagram proposed by Bloem is adequate to explain the present results.

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