Stabilization and hyperfine characterization of metastable tetragonal ZrO₂
- Autores
- Caracoche, María Cristina; Dova, María Teresa; López García, Alberto Raúl
- Año de publicación
- 1990
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Hydrolyzed ZrCl₄ and ZrO₂ · nH₂O have been used as starting compounds in a time-differential perturbed-angular correlation (TDPAC) investigation on the stabilization and thermal evolution of the metastable tetragonal form of ZrO₂. This phase, of quadrupole parameters very similar to those reported for the high temperature tetragonal form, emerges at moderate temperatures previous to the monoclinic phase, when starting from hydrolyzed ZrCl₄ and from ZrO₂ · 2H₂O treated previously at 673 K. Though in all cases zirconia appears initially as an amorphous compound characterized by unique hyperfine parameters, two different precursors have been observed to exist immediately previous to the occurrence of either the monoclinic or the metastable tetragonal crystal phases. Each of them exhibits a quadrupole frequency identical with and an asymmetry parameter higher than the ones characterizing the forthcoming corresponding crystal phases. A crystallization enthalpy of (33 ± 5) kJ/mol has been determined for the formation of the metastable tetragonal phase out of its precursor.
Facultad de Ciencias Exactas - Materia
-
Física
Zirconia polymorphism
High mechanical strength - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
.jpg)
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/144175
Ver los metadatos del registro completo
| id |
SEDICI_fef5d102ec4838e3326d6a2b8ee99b4a |
|---|---|
| oai_identifier_str |
oai:sedici.unlp.edu.ar:10915/144175 |
| network_acronym_str |
SEDICI |
| repository_id_str |
1329 |
| network_name_str |
SEDICI (UNLP) |
| spelling |
Stabilization and hyperfine characterization of metastable tetragonal ZrO₂Caracoche, María CristinaDova, María TeresaLópez García, Alberto RaúlFísicaZirconia polymorphismHigh mechanical strengthHydrolyzed ZrCl₄ and ZrO₂ · nH₂O have been used as starting compounds in a time-differential perturbed-angular correlation (TDPAC) investigation on the stabilization and thermal evolution of the metastable tetragonal form of ZrO₂. This phase, of quadrupole parameters very similar to those reported for the high temperature tetragonal form, emerges at moderate temperatures previous to the monoclinic phase, when starting from hydrolyzed ZrCl₄ and from ZrO₂ · 2H₂O treated previously at 673 K. Though in all cases zirconia appears initially as an amorphous compound characterized by unique hyperfine parameters, two different precursors have been observed to exist immediately previous to the occurrence of either the monoclinic or the metastable tetragonal crystal phases. Each of them exhibits a quadrupole frequency identical with and an asymmetry parameter higher than the ones characterizing the forthcoming corresponding crystal phases. A crystallization enthalpy of (33 ± 5) kJ/mol has been determined for the formation of the metastable tetragonal phase out of its precursor.Facultad de Ciencias Exactas1990info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf1940-1947http://sedici.unlp.edu.ar/handle/10915/144175enginfo:eu-repo/semantics/altIdentifier/issn/0884-2914info:eu-repo/semantics/altIdentifier/issn/2044-5326info:eu-repo/semantics/altIdentifier/doi/10.1557/jmr.1990.1940info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-03T11:04:33Zoai:sedici.unlp.edu.ar:10915/144175Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-03 11:04:33.377SEDICI (UNLP) - Universidad Nacional de La Platafalse |
| dc.title.none.fl_str_mv |
Stabilization and hyperfine characterization of metastable tetragonal ZrO₂ |
| title |
Stabilization and hyperfine characterization of metastable tetragonal ZrO₂ |
| spellingShingle |
Stabilization and hyperfine characterization of metastable tetragonal ZrO₂ Caracoche, María Cristina Física Zirconia polymorphism High mechanical strength |
| title_short |
Stabilization and hyperfine characterization of metastable tetragonal ZrO₂ |
| title_full |
Stabilization and hyperfine characterization of metastable tetragonal ZrO₂ |
| title_fullStr |
Stabilization and hyperfine characterization of metastable tetragonal ZrO₂ |
| title_full_unstemmed |
Stabilization and hyperfine characterization of metastable tetragonal ZrO₂ |
| title_sort |
Stabilization and hyperfine characterization of metastable tetragonal ZrO₂ |
| dc.creator.none.fl_str_mv |
Caracoche, María Cristina Dova, María Teresa López García, Alberto Raúl |
| author |
Caracoche, María Cristina |
| author_facet |
Caracoche, María Cristina Dova, María Teresa López García, Alberto Raúl |
| author_role |
author |
| author2 |
Dova, María Teresa López García, Alberto Raúl |
| author2_role |
author author |
| dc.subject.none.fl_str_mv |
Física Zirconia polymorphism High mechanical strength |
| topic |
Física Zirconia polymorphism High mechanical strength |
| dc.description.none.fl_txt_mv |
Hydrolyzed ZrCl₄ and ZrO₂ · nH₂O have been used as starting compounds in a time-differential perturbed-angular correlation (TDPAC) investigation on the stabilization and thermal evolution of the metastable tetragonal form of ZrO₂. This phase, of quadrupole parameters very similar to those reported for the high temperature tetragonal form, emerges at moderate temperatures previous to the monoclinic phase, when starting from hydrolyzed ZrCl₄ and from ZrO₂ · 2H₂O treated previously at 673 K. Though in all cases zirconia appears initially as an amorphous compound characterized by unique hyperfine parameters, two different precursors have been observed to exist immediately previous to the occurrence of either the monoclinic or the metastable tetragonal crystal phases. Each of them exhibits a quadrupole frequency identical with and an asymmetry parameter higher than the ones characterizing the forthcoming corresponding crystal phases. A crystallization enthalpy of (33 ± 5) kJ/mol has been determined for the formation of the metastable tetragonal phase out of its precursor. Facultad de Ciencias Exactas |
| description |
Hydrolyzed ZrCl₄ and ZrO₂ · nH₂O have been used as starting compounds in a time-differential perturbed-angular correlation (TDPAC) investigation on the stabilization and thermal evolution of the metastable tetragonal form of ZrO₂. This phase, of quadrupole parameters very similar to those reported for the high temperature tetragonal form, emerges at moderate temperatures previous to the monoclinic phase, when starting from hydrolyzed ZrCl₄ and from ZrO₂ · 2H₂O treated previously at 673 K. Though in all cases zirconia appears initially as an amorphous compound characterized by unique hyperfine parameters, two different precursors have been observed to exist immediately previous to the occurrence of either the monoclinic or the metastable tetragonal crystal phases. Each of them exhibits a quadrupole frequency identical with and an asymmetry parameter higher than the ones characterizing the forthcoming corresponding crystal phases. A crystallization enthalpy of (33 ± 5) kJ/mol has been determined for the formation of the metastable tetragonal phase out of its precursor. |
| publishDate |
1990 |
| dc.date.none.fl_str_mv |
1990 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
| format |
article |
| status_str |
publishedVersion |
| dc.identifier.none.fl_str_mv |
http://sedici.unlp.edu.ar/handle/10915/144175 |
| url |
http://sedici.unlp.edu.ar/handle/10915/144175 |
| dc.language.none.fl_str_mv |
eng |
| language |
eng |
| dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/issn/0884-2914 info:eu-repo/semantics/altIdentifier/issn/2044-5326 info:eu-repo/semantics/altIdentifier/doi/10.1557/jmr.1990.1940 |
| dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
| eu_rights_str_mv |
openAccess |
| rights_invalid_str_mv |
http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
| dc.format.none.fl_str_mv |
application/pdf 1940-1947 |
| dc.source.none.fl_str_mv |
reponame:SEDICI (UNLP) instname:Universidad Nacional de La Plata instacron:UNLP |
| reponame_str |
SEDICI (UNLP) |
| collection |
SEDICI (UNLP) |
| instname_str |
Universidad Nacional de La Plata |
| instacron_str |
UNLP |
| institution |
UNLP |
| repository.name.fl_str_mv |
SEDICI (UNLP) - Universidad Nacional de La Plata |
| repository.mail.fl_str_mv |
alira@sedici.unlp.edu.ar |
| _version_ |
1842260543961825280 |
| score |
13.13397 |