Study of hafnium (IV) oxide nanoparticles synthesized by polymerized complex and polymer precursor derived sol-gel methods

R. Ramos-González*, L. A. Garcia-Cerda, H. N. Alshareef, B. E. Gnade, M. A. Quevedo-Lopez

*Autor correspondiente de este trabajo

Producción científica: Capítulo del libro/informe/acta de congresoContribución a la conferenciarevisión exhaustiva

8 Citas (Scopus)

Resumen

This work reports the preparation and characterization of hafnium (IV) oxide (HfO2) nanoparticles grown by derived sol-gel routes that involves the formation of an organic polymeric network. A comparison between polymerized complex (PC) and polymer precursor (PP) methods is presented. For the PC method, citric acid (CA) and ethylene glycol (EG) are used as the chelating and polymerizable reagents, respectively. In the case of PP method, poly(acrylic acid) (PAA) is used as the chelating reagent. In both cases, different precursor gels were prepared and the hafnium (IV) chloride (HfCl4) molar ratio was varied from 0.1 to 1.0 for the PC method and from 0.05 to 0.5 for the PP method. In order to obtain the nanoparticles, the precursors were heat treated at 500 and 800 °C. The thermal characterization of the precursor gels was carried out by thermogravimetric analysis (TGA) and the structural and morphological characterization by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The XRD patterns of the samples obtained by both methods shows the formation of HfO2 at 500 °C with monoclinic crystalline phase. The PC method exhibited also the cubic phase. Finally, the HfO2 nanoparticles size (4 to 11 nm) was determined by TEM and XRD patterns.

Idioma originalInglés
Título de la publicación alojadaAdvanced Electron Microscopy and Nanomaterials
EditorialTrans Tech Publications Ltd
Páginas75-78
Número de páginas4
ISBN (versión impresa)087849281X, 9780878492817
DOI
EstadoPublicada - 2010
Publicado de forma externa
Evento1st Joint Advanced Electron Microscopy School for Nanomaterials and the Workshop on Nanomaterials, AEM-NANOMAT'09 - Saltillo, Coahuila, México
Duración: 29 sep. 20092 oct. 2009

Serie de la publicación

NombreMaterials Science Forum
Volumen644
ISSN (versión impresa)0255-5476
ISSN (versión digital)1662-9752

Conferencia

Conferencia1st Joint Advanced Electron Microscopy School for Nanomaterials and the Workshop on Nanomaterials, AEM-NANOMAT'09
País/TerritorioMéxico
CiudadSaltillo, Coahuila
Período29/09/092/10/09

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