Numerical Data for Some Commonly Used Solid State Reaction Equations

Abstract

Many solid state reactions can be represented by equations of the type F (α) = kt , where α is the fraction of material reacted in time, t. These equations can be expressed in the form F (α) = A ( t/t 0.5 ) where t 0.5 is the time for 50% reaction and A is a calculable constant depending on the form of F (α). Numerical tables are given of F (α) in relation to α, and to ( t/t 0.5 ), for nine equations corresponding to reactions which are diffusion controlled, or are reaction‐rate controlled, or obey first order kinetics, or follow the equations of Avrami and Erofe'ev. The application of the tables to the analysis of experimental data is described.