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Surface Decomposition of Strontium‐Doped Soft PbZrO 3 –PbTiO 3
Author(s) -
Zheng Hong,
Reaney Ian M.,
Lee William E.,
Jones Nik,
Thomas Howard
Publication year - 2002
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.1151-2916.2002.tb00067.x
Subject(s) - sintering , materials science , tetragonal crystal system , perovskite (structure) , monoclinic crystal system , mineralogy , analytical chemistry (journal) , decomposition , doping , strontium , ceramic , phase (matter) , crystallography , crystal structure , composite material , chemistry , optoelectronics , organic chemistry , chromatography
Sintering temperature has a pronounced effect on perovskite phase stability at the surface of Pb 0.88 Sr 0.12 Zr 0.54 Ti 0.44 Sb 0.02 O 3 (PSZT) soft piezoelectric ceramics ( d 33 ≈ 600 pC/N). After sintering 4 h at 1070°C, XRD reveals only perovskite PSZT peaks in the bulk and at the surface. As sintering temperature increases, XRD from the ceramic surface reveals a second‐phase peak at ∼27° (2θ), 0.316 nm ( d ‐spacing). After 4 h at 1280°C, further second‐phase peaks are observed, confirming it to be monoclinic ZrO 2 , accompanied by a strong increase in the degree of tetragonality of the perovskite phase. These observations are consistent with decomposition of the PSZT to ZrO 2 and tetragonal PZT (PbZrO 3 –PbTiO 3 ) associated with PbO loss. SEM and cross‐sectional TEM indicated that surface decomposition had progressed ∼0.5 mm into the sample after 4 h at 1280°C.