Zirconia gel has been hydrothermally treated at 1108C for 7 days in the presence of increasing concentrations of MOH basic mineralizers (M = Li, Na, K and (CH3)4N). The formation of crystalline products characterized by the presence of single or mixed phases of zirconia either as stable (monoclinic) or metastable forms (tetragonal or cubic) has been detected. At increasing temperatures of calcination, the structure of metastable cubic changes from cubic to tetragonal, then to stable monoclinic; while the structure of metastable tetragonal changes directly into monoclinic. The rate of crystallization and crystal growth of monoclinic zirconia, as well as the incorporation of M+ in the hydrothermally synthesized products are discussed in terms of nature and concentrations of mineralizers.

Crystallization of monoclinic zirconia from metastable phases

DELL'AGLI, Gianfranco;MASCOLO, Giuseppe;PANSINI, Michele
2000

Abstract

Zirconia gel has been hydrothermally treated at 1108C for 7 days in the presence of increasing concentrations of MOH basic mineralizers (M = Li, Na, K and (CH3)4N). The formation of crystalline products characterized by the presence of single or mixed phases of zirconia either as stable (monoclinic) or metastable forms (tetragonal or cubic) has been detected. At increasing temperatures of calcination, the structure of metastable cubic changes from cubic to tetragonal, then to stable monoclinic; while the structure of metastable tetragonal changes directly into monoclinic. The rate of crystallization and crystal growth of monoclinic zirconia, as well as the incorporation of M+ in the hydrothermally synthesized products are discussed in terms of nature and concentrations of mineralizers.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

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/11580/12818
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 29
social impact