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Synthesis of Fully Dense Nanostabilized Undoped Tetragonal Zirconia
Author(s) -
Maglia Filippo,
Dapiaggi Monica,
Tredici Ilenia,
Maroni Beatrice,
AnselmiTamburini Umberto
Publication year - 2010
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2010.03695.x
Subject(s) - cubic zirconia , materials science , monoclinic crystal system , tetragonal crystal system , sintering , grain size , chemical engineering , doping , phase (matter) , mineralogy , composite material , ceramic , crystallography , chemistry , crystal structure , organic chemistry , optoelectronics , engineering
Zirconia‐based materials, with very low or null doping contents (YO 1.5 between 0% and 4% mol), were prepared in the form of bulk nanostructured materials through a two‐step process. Nanometric powders of size‐stabilized tetragonal zirconia were synthesized by the Pechini method and subsequently densified using the high‐pressure field‐assisted rapid sintering method at temperatures around 850°–900°C for 5 min under a pressure of ∼800 MPa. By this method, theoretical densities of ∼98% were achieved while retaining the grain size in the final product between 40 and 50 nm. The transition to the thermodynamically stable monoclinic phase was consequently prevented, allowing for the first time the synthesis of size‐stabilized zirconia in a high‐density bulk form.