Kinetics and Mechanism of MAg4I5 Formation in the Solid-State Reactions Between β-Agl and MI (M = K, Rb, NH4)

1975 ◽  
Vol 30 (6-7) ◽  
pp. 909-910
Author(s):  
Giorgio Flor ◽  
Vincenzo Massarotti ◽  
Riccardo Riccardi
Keyword(s):  
Solid State ◽  
Diffusion Coefficients ◽  
The Self ◽  
Solid State Reactions ◽  
Contact Method ◽  
Self Diffusion ◽  
Rate Determining Step ◽  
Kinetics Of ◽  
Wagner’S Theory ◽  
Counter Diffusion

Abstract The kinetics of MAg4I5 (M=K, Rb, NH4) formation from β-AgI and MI are investigated on pellets by the contact method. For all the three reactions involved, the governing mechanism is found to be the cation counter-diffusion while the rate-determining step is the diffusion of M+ . On the basis of Wagner's theory the self-diffusion coefficients of K+ , Rb+ and NH4+ are evaluated in the three compounds.

scholarly journals Kinetics and Mechanism of Solid State Reactions in the Agl-TlI System

1975 ◽  
Vol 30 (3) ◽  
pp. 304-307
Author(s):  
Giorgio Flor ◽  
Vincenzo Massarotti ◽  
Riccardo Riccardi
Keyword(s):  
Solid State ◽  
Reaction Rate ◽  
Transport Number ◽  
Thermodynamic Theory ◽  
Solid State Reactions ◽  
Contact Method ◽  
Reaction Rate Constants ◽  
Rate Determining Step ◽  
Kinetics Of ◽  
Counter Diffusion

The kinetics of the solid state reactionsAgI + TiI → AgTlI2 (I)Agl + AgTl2I3 → 2 AgTlI2 (II)AgTlI2 + Til → AgTl2I3 (III)are investigated with reactant pellets by the contact method.With the aid of inert marker experiments and transport number determinations it was possible to state that the governing mechanism is the cation counter-diffusion in all cases and that the rate determining step is the diffusion of Tl+.The experimental reaction rate constants agree reasonably with those calculated on the basis of the Wagner's thermodynamic theory.

Kinetics of the Solid State Reaction between CuO and WO3

1980 ◽  
Vol 35 (3) ◽  
pp. 332-335 ◽  
Author(s):  
M. Lazzari ◽  
L. Peraldo Bicelli ◽  
B. Rivolta
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Defect Structure ◽  
Oxygen Vacancies ◽  
Contact Method ◽  
Oxygen Ions ◽  
Rate Determining Step ◽  
Type Semiconductor ◽  
Copper Tungstate ◽  
Kinetics Of

Abstract The solid state reaction of CuWO4-x formation from CuO and WO3 was studied by the contact method in air and nitrogen. The results showed that the reaction is governed by the diffusion of the W6+ and O2- ions and that the rate determining step is the diffusion of oxygen ions in the reaction product. This is in agreement with the defect structure of copper tungstate, an n-type semiconductor with oxygen vacancies through which the diffusion process is possible.

A Computation Software on Diffusion and Solid State Reactions Kinetics

2010 ◽  
Vol 148-149 ◽  
pp. 316-321
Author(s):  
Shi Yong Luo ◽  
Wen Cai Xu ◽  
Zun Zhong Liu ◽  
Jia Yun Zhang
Keyword(s):  
Solid State ◽  
Diffusion Coefficients ◽  
Management System ◽  
Database Management ◽  
Computer Software ◽  
Database Management System ◽  
Solid State Reactions ◽  
Critical Conditions ◽  
Solid Reaction ◽  
Kinetics Of

A computer software on solid/solid reaction kinetics, KinPreSSR, is one of subsystems in the software, Intellectualized Database Management System on Kinetics of Metallurgy (IDMSKM). KinPreSSR is a Windows application developed using Visual C++ and FoxPro, and includes two main modules, “DIFFUSION” and “REACTION”. KinPreSSR deals with the kinetics on the diffusion in solid state as well as solid/solid reactions. In the ‘REACTION’ module, the system has organized the commonly recognized kinetic models, parameters and employed both numerical and graphical methods for data analyses. The proper combination between the kinetic contents and the analytical methods enables users to use KinPreSSR for the evaluation and prediction of solid/solid reactions interested. The ‘DIFFUSION’ module includes two sub-modules of “database management system (DBMS)” and "Evaluation & prediction". The “DBMS” deals with the diffusion coefficients gathered from reported documents and the data evaluated according to some rules, besides, it can provide users with retrieval of diffusion coefficients. Based on the solutions to the Fick’s first law and the Fick’s second law in the four typical critical conditions, the "Evaluation & prediction" sub-module gives the predication of concentration distribution after diffusion process in solids or computation for diffusion coefficient.

An Explanation of the Influence of the Order-Disorder B2-B.C.C Transformation of the Self-Diffusion Behaviour in Alloys

1982 ◽  
Vol 21 ◽  
Author(s):  
H. Bakker
Keyword(s):  
Diffusion Coefficients ◽  
Isotope Effects ◽  
Tracer Diffusion ◽  
The Self ◽  
Disorder Transition ◽  
Self Diffusion ◽  
Kinetics Of ◽  
Diffusion Behaviour

ABSTRACTTheories describing the kinetics of ordered B2 and disordered b.c.c. alloys are applied to the effect of the order-disorder transition on tracer diffusion. Both tracer self-diffusion coefficients and isotope effects in βCuZn and equiatomic FeCo are considered.

scholarly journals Self-Diffusion Coefficients, Aggregation Numbers and the Range of Existence of Spherical Micelles of Oxyethylated Alkylphenols

2021 ◽  
Author(s):  
Victor P. Arkhipov ◽  
Natalia A. Kuzina ◽  
Andrei Filippov
Keyword(s):  
Aqueous Solutions ◽  
Diffusion Coefficients ◽  
The Self ◽  
Self Diffusion ◽  
Aggregation Numbers ◽  
Temperature Ranges ◽  
Spherical Micelles ◽  
Limiting Values

AbstractAggregation numbers were calculated based on measurements of the self-diffusion coefficients, the effective hydrodynamic radii of micelles and aggregates of oxyethylated alkylphenols in aqueous solutions. On the assumption that the radii of spherical micelles are equal to the lengths of fully extended neonol molecules, the limiting values of aggregation numbers corresponding to spherically shaped neonol micelles were calculated. The concentration and temperature ranges under which spherical micelles of neonols are formed were determined.

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