Pressure Effect on the Kinetics of Reaction Between Solid NaCl and ZrCl4 or HfCl4 Vapors

1971 ◽  
Vol 49 (17) ◽  
pp. 2885-2890 ◽  
Author(s):  
P. Pint ◽  
S. N. Flengas
Keyword(s):  
Sodium Chloride ◽  
Single Crystals ◽  
Constant Temperature ◽  
Pressure Effect ◽  
Heterogeneous Reaction ◽  
Zirconium Tetrachloride ◽  
Hafnium Tetrachloride ◽  
Diffusion Controlled ◽  
Kinetics Of Reaction ◽  
Kinetics Of

The kinetics of reaction between single crystals of sodium chloride and zirconium tetrachloride and hafnium tetrachloride vapors, to form sodium hexachlorozirconate and sodium hexachlorohafnate, respectively, have been investigated as a function of the tetrachloride pressures at a constant temperature of 485 °C. The rate of formation of Na2ZrCl6 is kinetically more favorable. The heterogeneous reaction is diffusion controlled, with the rate of diffusion depending on the availability of Cl− vacancies.

Kinetics of reaction of zirconium tetrachloride vapors with solid sodium chloride spheres

1975 ◽  
Vol 6 (4) ◽  
pp. 607-612 ◽  
Author(s):  
S. Majumdar ◽  
K. L. Luthra ◽  
H. S. Ray ◽  
P. C. Kapur
Keyword(s):  
Sodium Chloride ◽  
Zirconium Tetrachloride ◽  
Kinetics Of Reaction ◽  
Kinetics Of

Kinetics of the reaction of hafnium tetrachloride vapour with solid sodium chloride

1976 ◽  
Vol 26 (5) ◽  
pp. 259-268 ◽  
Author(s):  
Sibnath Majumdar ◽  
Hemshanker S. Ray ◽  
Prakash C. Kapur
Keyword(s):  
Sodium Chloride ◽  
Hafnium Tetrachloride ◽  
Kinetics Of

Kinetics of the reaction of hafnium tetrachloride vapour with solid sodium chloride

2007 ◽  
Vol 26 (1) ◽  
pp. 259-268
Author(s):  
Sibnath Majumdar ◽  
Hemshanker S. Ray ◽  
Prakash C. Kapur
Keyword(s):  
Sodium Chloride ◽  
Hafnium Tetrachloride ◽  
Kinetics Of

Kinetics of formation of sodium chlorozirconate

1967 ◽  
Vol 45 (20) ◽  
pp. 2317-2320 ◽  
Author(s):  
J. D. Dutrizac ◽  
S. N. Flengas
Keyword(s):  
Rate Constant ◽  
Parabolic Rate Constant ◽  
Zirconium Tetrachloride ◽  
Formation Reaction ◽  
Diffusion Controlled ◽  
Kinetics Of Formation ◽  
Torr Pressure ◽  
Arrhenius Rate Equation ◽  
Kinetics Of ◽  
Method Analysis

The kinetics of formation of sodium hexachlorozirconate from sodium chloride single crystals and zirconium tetrachloride vapor at about 600 Torr have been investigated by the weight-gain method. Analysis of the results showed the formation reaction to be diffusion controlled, with zirconium tetrachloride being the most probable diffusing species. The apparent energy of activation has been determined for this reaction from the variation of the rate constant with temperature, and it was found to be 12.3 ± 3 kcal/mole. The Arrhenius rate equation for the formation of Na2ZrCl6 from NaCl and ZrCl4 at 600 Torr pressure, in the temperature range 400 to 500 °C, is [Formula: see text]where the units of the parabolic rate constant, K, are (g(Na2ZrCl6))2 cm−4 h−1.

The Hydrostatic Pressure Effect on Elastic Properties of B2-Phase Single Crystals Ti50Ni48Fe2and Ti50Ni45Fe5Alloys

1995 ◽  
Vol 05 (C8) ◽  
pp. C8-729-C8-734
Author(s):  
A.I. Lotkov ◽  
V.P. Lapshin ◽  
V.A. Goncharova ◽  
H.V Chernysheva ◽  
V.N. Grishkov ◽  
...  
Keyword(s):  
Hydrostatic Pressure ◽  
Single Crystals ◽  
Elastic Properties ◽  
Pressure Effect ◽  
B2 Phase
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