Studies on metal hydroxy compounds. XV. Electrical conductivity measurements on Cd(OH)Cl, Cu(OH)Cl, and PbOHCl

1977 ◽  
Vol 55 (19) ◽  
pp. 3377-3379
Author(s):  
Mahadeva Natarajan ◽  
Etalo A. Secco
Keyword(s):  
Electrical Conductivity ◽  
Solid State ◽  
Temperature Measurements ◽  
Conductivity Measurements ◽  
Decomposition Step ◽  
Hydroxy Compounds

The electrical conductivity dependence on temperature measurements for three metal basic chlorides are reported. The conductivity results yield energy values which are interpreted in terms of active solid state processes leading up to, and including, the decomposition step.

Synthesis of New Chalcogenide Materials. The Novel One-Dimensional Semiconductor K4 Ti3 S14

1987 ◽  
Vol 97 ◽  
Author(s):  
Steven A. Sunshine ◽  
Doris Kang ◽  
James A. Ibers
Keyword(s):  
Electrical Conductivity ◽  
Solid State ◽  
Alkali Metal ◽  
The Novel ◽  
Conductivity Measurements ◽  
One Dimensional ◽  
General Utility ◽  
Solid State Materials ◽  
Chalcogenide Materials

ABSTRACTThe use of A2 Q/Q melts (A - alkali metal, Q - S or Se) for the synthesis of new one-dimensional solid-state materials is found to be of general utility and is illustrated here for the synthesis of K4 Ti3 SI4. Reaction of Ti metal with a K2 S/S melt at 375°C for 50 h affords K4 Ti3 SI4. The structure possesses one-dimensional chains of seven and eightcoordinate Ti atoms with each chain isolated from all others by surrounding K atoms. There are six S-S pairs (dave - 2.069(3) Å) so that the compound is one of TiIV and may be described as K4 [Ti3 (S)2 (S2)6]. Electrical conductivity measurements indicate that this material is a semiconductor.

The Electrical Conductivity Measurements of Solid Electrolyte, CuZr2 (PO4)3

1988 ◽  
Vol 135 ◽  
Author(s):  
T.J. Lee ◽  
P.C. Yao ◽  
S.E. Hsu ◽  
D.J. Fray
Keyword(s):  
Electrical Conductivity ◽  
Solid State ◽  
Electrical Properties ◽  
Solid Electrolyte ◽  
Copper Ion ◽  
Conductivity Measurements ◽  
Ion Conductor

AbstractThis study reports measurements of electrical properties of the solid state copper ion conductor CuZr2 (PO4)3.

Structural and catalytic properties of MoO3-NiO mixed oxides system

1989 ◽  
Vol 54 (6) ◽  
pp. 1508-1513 ◽  
Author(s):  
Abd El Aziz A. Said ◽  
Ehsan A. Hassan ◽  
Ahmed M. El-Awad ◽  
Khalf-Alla M. Abd El-Salaam
Keyword(s):  
Electrical Conductivity ◽  
Catalytic Activity ◽  
Solid State ◽  
Surface Area ◽  
Solid State Reaction ◽  
Mixed Oxides ◽  
Catalytic Properties ◽  
Xrd Analysis ◽  
Conductivity Measurements ◽  
Activity Measurements

The unsupported MoO3-NiO catalysts were investigated. The addition process of NiO was followed by electrical conductivity measurements, IR, XRD, surface area and finally catalytic activity measurements. The conductivity measurements revealed an increase in σ values when 2-propanol vapour was admitted in the gas feed. IR and XRD analysis detected a solid state reaction at about 500 °C and its maximum was shown around 70 mole % Ni2+ where NiMoO4 lattice diffraction type was detected. Parallel with these measurements, the catalytic activity was determined for the catalysts calcined at 500 °C using the decomposition of 2-propanol. The conversion and the selectivity increased as Ni2+ was added to a concentration of 70 mole % Ni2+ ions. The results were discussed in respect to the creation of holes associated to Ni2+ addition.

Electrical Conductivity and Nonstoichiometry in Pr0.545Ce0.455O2-x

1996 ◽  
Vol 453 ◽  
Author(s):  
O. Porat ◽  
H. L. Tuller ◽  
M. Shelef ◽  
E. M. Logothetis
Keyword(s):  
Electrical Conductivity ◽  
Phase Separation ◽  
Solid State ◽  
Small Polaron ◽  
Coulometric Titration ◽  
Oxygen Nonstoichiometry ◽  
Conductivity Measurements ◽  
Two Phase ◽  
Polaron Hopping ◽  
P Type

AbstractThe oxygen nonstoichiometry of Pr0.545Ce0.455O2-x was studied by solid state coulometric titration and was found to be extensive (0 ≤ y ≤ 0.28) at temperatures of 400–600 °C. The Po2 - x curves showed evidence of the existence of a number of single and two phase regions. Electrical conductivity measurements, performed under similar conditions, exhibited a p-n transition for temperature of 500 °C and below. The activated p-type conductivity was modeled in terms of the small polaron hopping mechanism. The p-n transition was correlated with the onset of phase separation.

A-SITE DEFICIENCY AND STRUCTURAL AND ELECTRICAL CHARACTERISTICS OF (Sr1-xREx)1-yTiO3 PEROVSKITES (RE=La, Nd and Sm)

2012 ◽  
Vol 06 ◽  
pp. 85-90 ◽  
Author(s):  
TOSHIHIRO MORIGA ◽  
SHINTARO YABUI ◽  
YUTA HIGASHI ◽  
KEI-ICHIRO MURAI ◽  
ZHEN-WEI WANG ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Solid State ◽  
Solid State Reaction Method ◽  
Impurity Phase ◽  
Electrical Characteristics ◽  
Conductivity Measurements ◽  
Metallic Behavior ◽  
Reaction Method ◽  
Absolute Value ◽  
A Site

The A-site deficient ( Sr 1- x RE x )1- y TiO 3 perovskites ( RE = La , Nd and Sm , 0≤ x ≤0.5, y =0, 0.05 and 0.10) were studied using samples prepared by solid-state reaction method. The substitution of Sr by the smaller RE seemed to result in the increased x region of TiO 2 appearance as an impurity phase against the larger y compositions. A slope of the tied line of the lattice parameters a as a function of x was steepened with an increase of y . Electrical conductivity measurements of ( Sr 0.9 RE 0.1)1- y TiO 3 revealed that the samples without cationic deficiency in the A-site were semiconducting whereas the A-site deficient samples showed basically metallic behavior. The absolute value of observed conductivities for all the measured samples were also reduced in the order of the size of RE .

Total Body Electrical Conductivity Measurements in the Neonate

1991 ◽  
Vol 18 (3) ◽  
pp. 611-627 ◽  
Author(s):  
Marta L. Fiorotto ◽  
William J. Klish
Keyword(s):  
Electrical Conductivity ◽  
Conductivity Measurements ◽  
Total Body

Electrical conductivity studies on silica phases and the effects of phase transformation

2019 ◽  
Vol 104 (12) ◽  
pp. 1800-1805
Author(s):  
George M. Amulele ◽  
Anthony W. Lanati ◽  
Simon M. Clark
Keyword(s):  
Electrical Conductivity ◽  
Activation Volume ◽  
Activation Enthalpy ◽  
Hydrogen Charge ◽  
Charge Compensation ◽  
Composition Analysis ◽  
Conductivity Measurements ◽  
Pressure System ◽  
Electrical Conductivities ◽  
Silica Phases

Abstract Starting with the same sample, the electrical conductivities of quartz and coesite have been measured at pressures of 1, 6, and 8.7 GPa, respectively, over a temperature range of 373–1273 K in a multi-anvil high-pressure system. Results indicate that the electrical conductivity in quartz increases with pressure as well as when the phase change from quartz to coesite occurs, while the activation enthalpy decreases with increasing pressure. Activation enthalpies of 0.89, 0.56, and 0.46 eV, were determined at 1, 6, and 8.7 GPa, respectively, giving an activation volume of –0.052 ± 0.006 cm3/mol. FTIR and composition analysis indicate that the electrical conductivities in silica polymorphs is controlled by substitution of silicon by aluminum with hydrogen charge compensation. Comparing with electrical conductivity measurements in stishovite, reported by Yoshino et al. (2014), our results fall within the aluminum and water content extremes measured in stishovite at 12 GPa. The resulting electrical conductivity model is mapped over the magnetotelluric profile obtained through the tectonically stable Northern Australian Craton. Given their relative abundances, these results imply potentially high electrical conductivities in the crust and mantle from contributions of silica polymorphs. The main results of this paper are as follows:The electrical conductivity of silica polymorphs is determined by impedance spectroscopy up to 8.7 GPa.The activation enthalpy decreases with increasing pressure indicating a negative activation volume across the silica polymorphs.The electrical conductivity results are consistent with measurements observed in stishovite at 12 GPa.

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