Estudo in situ do perfil de concentração do soluto durante o processo de crescimento e dissolução de monocristal de alfa-HgI2 / In situ study of solute concentration profile during crystal growth and dissolution of alfha-HgI2

AUTOR(ES)
DATA DE PUBLICAÇÃO

1993

RESUMO

The solute concentration profile near to the crystal/liquid inter-face was studied during mercuric iodide crystal growth and dissolution with phase measurement by diffraction optical technique - "diffrasor". Its simple, sensitive to hydrodynamics phenomena and may be used either in macro or in micro-observations. With this technique we measured, for the first time, the solute concentration profile up to 10 um from the a-Hg12 crystal surface- The state of the art results the us first that ALFA-HgI IND.2is strongly affected by supersaturation, convenction in the solution, history of the growth process, surface quality and of the tied facets numbers- The solute diffusion and interfacial flow are considered responsible by mass transport during crystal growth. A anomaly in the concentration profile near interface was detected, for the first time, during the mercuric iodide crystal dissolution- We believe that this anomaly is directly associated with the solute flux during dissolution process.

ASSUNTO(S)

transport phenomena crescimento de cristais mercuric iodide solução aquosa crystal growth fenômenos de transporte

ACESSO AO ARTIGO

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