Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов (Nov 2015)
ANALYSIS OF FUSION AND CRYSTALLIZATION PROCESSES OF CRYSTALLINE HYDRATES ON BASIS OF FUSIBILITY THERMOGRAMS
Abstract
On basis of heating and cooling thermograms analysis of fusion, dehydration, hydration and solidification processes of crystalline hydrates Na2S2O3*5H2O, Na2SO4*10H2O, Na2SO3*7H2O, Na2CO3*10H2O and Na2CH3COO*3H2O is given. Hydrates structurization schemes in the liquid state are offered. The interpretation of different crystallization types reasons (quasiequilibrium and nonequilibrium-explosive) is given. Various stages of crystallization at EC and NEEC are considered. The equations for enthalpies of nucleation, coagulation and an isothermalpre-crystallization are obtained.