Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов (Nov 2015)

ANALYSIS OF FUSION AND CRYSTALLIZATION PROCESSES OF CRYSTALLINE HYDRATES ON BASIS OF FUSIBILITY THERMOGRAMS

  • V.D. Aleksandrov,
  • Sh.K. Amerkhanova,
  • V.A. Postnikov,
  • A.Yu. Sobolev,
  • O.V. Sobol

Journal volume & issue
no. 7
pp. 5 – 15

Abstract

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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.

Keywords