Influence of the degree of dispersion of a crystalline solid on its melting point
Abstract
In my report of April 6, 1906, I wrote that two factors play the most important role in the process of melting dispersed systems: the degree of disruption of the continuity of the body and the associated change in the conditions of heat transfer, both before the melting process and during this process The degree of discontinuity affects, firstly, the latent heat of fusion, and, secondly, together with the altered conditions of heat transfer, the softening of the solid system even before the start of melting. The surface layer of a crystal is chemically inhomogeneous, which affects the physical and physicochemical properties of the substance especially strongly at a high degree of dispersion.
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References
- Zh. R. F. O. (J. of the Rus. Chem. Soc.) 24 641 (1891).
- Zeitsch. physik. Ch. 22, 289–330 (1897).
- P. P. von Weimarn Zh. R. Kh. O. 40 2767 (1908); 1434–1447 (1908).
- P. P. von Weimarn. Über einige Oberflächeneigenschaften disperser kristallinischer Stoffe u. s. w.
- Koll. Zeitschr. 6 32–38 (1910).
- Capillary pressure is not uniform on different faces of a crystal; therefore, it cannot transform a crystalline polyhedron into a sphere.
- Zh. R. F. O. (J. of the Rus. Chem. Soc.) 35 585; 38 129.