ChemInform Abstract: STUDIES ON THE DEMIXING KINETICS OF SILVER BROMIDE-SODIUM BROMIDE SOLID SOLUTION. I. ELECTRICAL CONDUCTIVITY MEASUREMENTS

1978 ◽  
Vol 9 (45) ◽  
Author(s):  
W. PREIDEL ◽  
J. NOELTING
Keyword(s):  
Solid Solution ◽  
Electrical Conductivity ◽  
Sodium Bromide ◽  
Silver Bromide ◽  
Conductivity Measurements ◽  
Kinetics Of

Production and Study of Ca/Sn(II) Metastable Fluoride Ion Conductors

1997 ◽  
Vol 481 ◽  
Author(s):  
Michael F. Bell ◽  
Georges Dénès ◽  
Zhimeng Zhu
Keyword(s):  
Solid Solution ◽  
Electrical Conductivity ◽  
High Temperature ◽  
Calcium Nitrate ◽  
Fluoride Ion ◽  
Conductivity Measurements ◽  
Ambient Conditions ◽  
Reaction Conditions ◽  
Density Measurements ◽  
Ion Conductors

ABSTRACTPrecipitation reactions from aqueous solutions of calcium nitrate and tin(II) fluoride result in the formation of two metastable phases, depending on the reaction conditions. Crystalline CaSn2F6 and the microcrystalline Ca1-xSnxF2 solid solution are obtained, the latter crystallizing in the cubic fluorite (CaF2) type with total Ca/Sn disorder. Both phases are fluoride ion conductors. Electrical conductivity measurements versus temperature and bulk density measurements show that both phases are far from thermodynamic equilibrium at ambient conditions, and thus are metastable. Both decompose to a mixture of SnF2 and CaF2 at high temperature. In addition, CaSn2F6 is chemically unstable in an aqueous medium, in which it looses SnF2 to give the microcrystalline Ca1-xSnxF2 solid solution.

CO2 decomposition kinetics of YBa2Cu3O7−x via in situ electrical conductivity measurements

1991 ◽  
Vol 6 (7) ◽  
pp. 1393-1397 ◽  
Author(s):  
E.A. Cooper ◽  
A.K. Gangopadhyay ◽  
T.O. Mason ◽  
U. Balachandran
Keyword(s):  
Electrical Conductivity ◽  
Volume Fraction ◽  
Conductivity Measurements ◽  
Impedance Measurements ◽  
Kinetics Of Decomposition ◽  
Rapid Formation ◽  
Kinetics Of ◽  
Gradual Decay ◽  
Co2 Decomposition

In situ electrical conductivity measurements were employed to study the kinetics of decomposition of YBa2Cu3O7−x in flowing 5% CO2/95% O2 atmosphere at 815 °C. Three regimes could be observed in the decay of the conductivity with time, interpreted as corresponding to nucleation over the initial 5–10 min, rapid formation of Y2Cu2O5, BaCO3, and CuO between 10 min and 1 h, and finally transition to the formation of Y2BaCuO5, BaCO3, and CuO at longer times. The absence of dispersion in impedance measurements as a function of frequency together with the gradual decay of conductivity (roughly corresponding to the remaining volume fraction of YBa2Cu3O7−x) indicates that not all grain boundaries are involved in the decomposition process.

Crystallization kinetics of 1Na2O·2CaO·3SiO2·glass monitored by electrical conductivity measurements

2007 ◽  
Vol 353 (22-23) ◽  
pp. 2237-2243 ◽  
Author(s):  
Ana Candida M. Rodrigues ◽  
Gilberto Tadashi Niitsu ◽  
Edgar Dutra Zanotto ◽  
Miguel Oscar Prado ◽  
Vladimir Fokin
Keyword(s):  
Electrical Conductivity ◽  
Crystallization Kinetics ◽  
Conductivity Measurements ◽  
Kinetics Of

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
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