Hydrous zirconium dioxide: interfacial properties, the formation of monodisperse spherical particles, and its crystallization at high temperatures

The characteristics of hydrous zirconia gels obtained by hydrolysis of highly acidic ZrOCl₂· 8H₂O solutions at ∼100ºC are described. Under adequate conditions, monodisperse spherical hydrous zirconia is obtained. The role of sulphate and chloride ions is described. The gel has a large water content,...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Blesa, Miguel Ángel, Maroto, Alberto J. G., Passaggio, S. I., Figliolia, N. E., Rigotti, Guillermo
Formato: Articulo
Lenguaje:Inglés
Publicado: 1985
Materias:
Física
Crystallization
Zirconia
Interfacial Property
Binding Model
ZrOCl2
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/142770
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-142770
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Crystallization
Zirconia
Interfacial Property
Binding Model
ZrOCl2
spellingShingle Física
Crystallization
Zirconia
Interfacial Property
Binding Model
ZrOCl2
Blesa, Miguel Ángel
Maroto, Alberto J. G.
Passaggio, S. I.
Figliolia, N. E.
Rigotti, Guillermo
Hydrous zirconium dioxide: interfacial properties, the formation of monodisperse spherical particles, and its crystallization at high temperatures
topic_facet Física
Crystallization
Zirconia
Interfacial Property
Binding Model
ZrOCl2
description The characteristics of hydrous zirconia gels obtained by hydrolysis of highly acidic ZrOCl₂· 8H₂O solutions at ∼100ºC are described. Under adequate conditions, monodisperse spherical hydrous zirconia is obtained. The role of sulphate and chloride ions is described. The gel has a large water content, indicating only modest crosslinking. Crystallization upon heating takes place with the formation of both monoclinic and tetragonal zirconia polymorphs; X-ray line widening studies do not indicate a particle size-crystal structure correlation. On the basis of this observation and using Stranki's rule, the crystallization sequence upon heating is rationalized. Surface properties of hydrous zirconia are discussed on the basis of electrophoretic measurements, and compared with those of baddeleyte. The site binding model is not very adequate to describe these systems, and the existence of a very thin gel-like region at the baddeleyte-water interface is postulated.
format Articulo
Articulo
author Blesa, Miguel Ángel
Maroto, Alberto J. G.
Passaggio, S. I.
Figliolia, N. E.
Rigotti, Guillermo
author_facet Blesa, Miguel Ángel
Maroto, Alberto J. G.
Passaggio, S. I.
Figliolia, N. E.
Rigotti, Guillermo
author_sort Blesa, Miguel Ángel
title Hydrous zirconium dioxide: interfacial properties, the formation of monodisperse spherical particles, and its crystallization at high temperatures
title_short Hydrous zirconium dioxide: interfacial properties, the formation of monodisperse spherical particles, and its crystallization at high temperatures
title_full Hydrous zirconium dioxide: interfacial properties, the formation of monodisperse spherical particles, and its crystallization at high temperatures
title_fullStr Hydrous zirconium dioxide: interfacial properties, the formation of monodisperse spherical particles, and its crystallization at high temperatures
title_full_unstemmed Hydrous zirconium dioxide: interfacial properties, the formation of monodisperse spherical particles, and its crystallization at high temperatures
title_sort hydrous zirconium dioxide: interfacial properties, the formation of monodisperse spherical particles, and its crystallization at high temperatures
publishDate 1985
url http://sedici.unlp.edu.ar/handle/10915/142770
work_keys_str_mv AT blesamiguelangel hydrouszirconiumdioxideinterfacialpropertiestheformationofmonodispersesphericalparticlesanditscrystallizationathightemperatures
AT marotoalbertojg hydrouszirconiumdioxideinterfacialpropertiestheformationofmonodispersesphericalparticlesanditscrystallizationathightemperatures
AT passaggiosi hydrouszirconiumdioxideinterfacialpropertiestheformationofmonodispersesphericalparticlesanditscrystallizationathightemperatures
AT figlioliane hydrouszirconiumdioxideinterfacialpropertiestheformationofmonodispersesphericalparticlesanditscrystallizationathightemperatures
AT rigottiguillermo hydrouszirconiumdioxideinterfacialpropertiestheformationofmonodispersesphericalparticlesanditscrystallizationathightemperatures
bdutipo_str Repositorios
_version_ 1764820458817978369

Ejemplares similares