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Enhanced Phase Stability for Tetragonal Zirconia in Precipitation Synthesis
Author(s) -
Wu NaeLih,
Wu TonFon
Publication year - 2000
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.1151-2916.2000.tb01713.x
Subject(s) - tetragonal crystal system , calcination , precipitation , materials science , metastability , chemical engineering , cubic zirconia , yttria stabilized zirconia , phase (matter) , surface energy , oxide , coprecipitation , mineralogy , inorganic chemistry , chemistry , metallurgy , composite material , ceramic , catalysis , organic chemistry , physics , meteorology , engineering
Tetragonal ZrO 2 nanocrystallites—with or without yttria (3 mol%) doping—have been synthesized via a precipitation process in which the hydrous oxide precipitate reacts with hexamethyldisilazane (HMDS) vapor before calcination. The nanocrystallites are formed and retain a tetragonal structure for hours after calcination at temperatures of 300°–1100°C. The enhanced structural metastability has been attributed to the combined effect of suppressed grain growth and reduced surface energy that results from the HMDS treatment.