Zirconia (ZrO2) may exist in different polymorphs. At low pressures and for temperatures as high as ∼-1150 °C only the stable phase has the monoclinic structure; tetragonal and cubic oxides form however, as metastable phases together with the monoclinic in the lower temperature region (up to ca. 600 - 800 °C). By combining stages of calcination (of a hydrothermal precursor) with severe grinding treatments of the powders it was possible to obtain pure phase monoclinic oxides (S. Ardizzone, G. Bassi, G. Liborio, Colloids and Surfaces 51 (1990) 207). This paper reports results concerning the effects specifically induced by the severe grinding on the phase composition, on the state of the surface and on the interfacial electrostatic reactivity of the powders. The effects produced by ageing, calcinations and further mechanical treatments of the samples are also examined by the same techniques i.e. by X-ray diffraction, XPS determinations and surface charge measurements. © 1991.

Bulk, surface and double layer properties of zirconia polymorphs subjected to mechanical treatments / S. Ardizzone, P. Lazzari, M. Sarti, M. Cattania. - In: MATERIALS CHEMISTRY AND PHYSICS. - ISSN 0254-0584. - 28:4(1991), pp. 399-412.

Bulk, surface and double layer properties of zirconia polymorphs subjected to mechanical treatments

S. Ardizzone;
1991

Abstract

Zirconia (ZrO2) may exist in different polymorphs. At low pressures and for temperatures as high as ∼-1150 °C only the stable phase has the monoclinic structure; tetragonal and cubic oxides form however, as metastable phases together with the monoclinic in the lower temperature region (up to ca. 600 - 800 °C). By combining stages of calcination (of a hydrothermal precursor) with severe grinding treatments of the powders it was possible to obtain pure phase monoclinic oxides (S. Ardizzone, G. Bassi, G. Liborio, Colloids and Surfaces 51 (1990) 207). This paper reports results concerning the effects specifically induced by the severe grinding on the phase composition, on the state of the surface and on the interfacial electrostatic reactivity of the powders. The effects produced by ageing, calcinations and further mechanical treatments of the samples are also examined by the same techniques i.e. by X-ray diffraction, XPS determinations and surface charge measurements. © 1991.
Powders - Testing ; Surface Phenomena, Double Layer Properties ; Interfacial Electrostatics ; Mechanical Treatments ; Zirconia Polymorphs, Zirconia
Settore CHIM/02 - Chimica Fisica
MATERIALS CHEMISTRY AND PHYSICS
Article (author)
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

Caricamento pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/187646
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 23
  • ???jsp.display-item.citation.isi??? 23
social impact