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Phase formation and lattice distortion of Lu 2 O 3 ‐doped ZrO 2 in comparison with Y 2 O 3 ‐doped ZrO 2
Author(s) -
Park Minsung,
Kim Buyoung,
Kim Taewoo,
Hong Eunpyo,
Lee Heesoo
Publication year - 2020
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.13448
Subject(s) - doping , materials science , rietveld refinement , analytical chemistry (journal) , crystal structure , crystallography , mineralogy , chemistry , optoelectronics , chromatography
Lu 2 O 3 and Y 2 O 3 doping of 8, 11, and 18 mol% in ZrO 2 were prepared by solid solution reaction, aiming to study the phase stabilization of Lu 2 O 3 ‐doped ZrO 2 and Y 2 O 3 ‐doped ZrO 2 in terms of phase formation and lattice distortion. The Rietveld refinement results indicated that Lu 2 O 3 ‐doped ZrO 2 and Y 2 O 3 ‐doped ZrO 2 followed the same trend in terms of cubic phase fraction, increasing from 25%–30% (8 mol%) to 95%–100% (11 and 18 mol%). This phase formation was confirmed by observing the same diffraction ring pattern observed for the Lu 2 O 3 ‐doped ZrO 2 and Y 2 O 3 ‐doped ZrO 2 . The Vickers hardness of the Lu 2 O 3 ‐doped ZrO 2 was 4.3% higher than that of Y 2 O 3 ‐doped ZrO 2 at 8 mol%, but 9.7% and 14.8% lower at 11 and 18 mol%, respectively. This was likely caused by the lattice distortion effect of Y 2 O 3 doping overpowering the field strength difference between Lu 3+ and Y 3+ .