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Synthesis and Phase Stability of Cotunnite‐Type Zirconia
Author(s) -
Ohtaka Osamu,
Kumi Shoichi,
Ito Eiji
Publication year - 1988
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.1151-2916.1988.tb07525.x
Subject(s) - tetragonal crystal system , phase (matter) , cubic zirconia , phase boundary , materials science , crystallography , chemistry , metallurgy , ceramic , organic chemistry
The phase boundary between two high‐pressure phases (ortho I and ortho II) of ZrO 2 was obtained by synthesis experiments using a 6–8 anvil‐type device. The phase boundary was linearly approximated, its slope being +400 K/GPa. The phase with cotunnite (PbCl 2 ) structure (ortho II) appeared above 15 GPa. A single phase of Y‐doped ZrO 2 with the cotunnite structure was also synthesized, but the stabilized tetragonal phase remained unchanged after the treatments at conditions where the ortho I phase forms in pure ZrO 2 .