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Synthesis of Metastable Tetragonal (t′) ZrO 2 ‐12 mol% YO 1.5 by the Organic Polymerized Complex Method
Author(s) -
Yokota Osamu,
Yashima Masatomo,
Kakihana Masato,
Shimofuku Akira,
Yoshimura Masahiro
Publication year - 1999
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.1151-2916.1999.tb01917.x
Subject(s) - tetragonal crystal system , yttrium , materials science , polymerization , annealing (glass) , cubic zirconia , metastability , crystallization , ethylene glycol , zirconium , yttria stabilized zirconia , analytical chemistry (journal) , nuclear chemistry , inorganic chemistry , crystallography , ceramic , crystal structure , chemistry , polymer , organic chemistry , metallurgy , composite material , oxide
Zirconia‐yttria (ZrO 2 ‐12 mol% YO 1.5 ) powders were prepared via an organic polymerized complex method that was based on the Pechini‐type reaction route. A mixed solution of citric acid, ethylene glycol, and zirconium and yttrium ions were polymerized to form a transparent resin, which then became a black powder after charring at ∼450°C. This product was used as a precursor for ZrO 2 ‐12 mol% YO 1.5 . The formation of a metastable tetragonal ( t ´) phase with compositional homogeneity occurred when the precursor was heated at the rate of 10°C/min up to a temperature >560°C. X‐ray diffraction peaks became sharp with an increase in the heat‐treatment temperature. A t ´‐form with cell parameters of a = 5.1265(6) Å and c = 5.1559(9) Å were obtained via heat treatment up to 1400°C. This study shows that the organic polymerized complex method is effective for obtaining the compositionally homogeneous metastable t ´‐form in the ZrO 2 ‐YO 1.5 system for short annealing times at relatively lower temperatures.