ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

The Effect of Admixtures in Solid Phases and of Geometrical Properties of Particles on Equilibrium of the Reaction L(s) = M(s) + N(g)

I. Proks

Institute of Inorganic Chemistry, Slovak Academy of Sciences, Bratislava 9

Abstract: The thermal decompn. reaction, L(s) = M(s) N(g) was studied theoretically. The effect on the equil. temp., te, and on the gas equil. pressure, pN;e, of impurities and geometrical properties of particles of the 2 cryst. phases were established. As e.g., the obtained formulas were applied to the decompn. of CaCO₃ and MgCO₃. At sufficiently high temps., simultaneously with the decompn. reaction, or immediately after, sintering and growth of L and M can take place. When these 2 processes are considerably slower with respect to the establishment of the equil. of the decompn. reaction, then the system will pass through a series of metastable equil. states. In this case the values of the fugacities of N depend on the curvatures of both the surface of the individual grains and the surface of the necks formed during sintering.

Full paper in Portable Document Format: 234a241.pdf

Chemical Papers 23 (4) 241–253 (1969)