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Phase transition behavior of Pb(Hf, Sn, Ti, Nb)O 3 ceramics at morphotropic phase boundary
Author(s) -
Chao Wenna,
Wei Jing,
Yang Tongqing,
Li Yongxiang
Publication year - 2020
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/jace.16863
Subject(s) - phase boundary , materials science , phase transition , phase (matter) , antiferroelectricity , orthorhombic crystal system , tetragonal crystal system , dielectric , hysteresis , condensed matter physics , curie temperature , analytical chemistry (journal) , ferroelectricity , crystallography , chemistry , crystal structure , ferromagnetism , physics , optoelectronics , organic chemistry , chromatography
The phase transition and dielectric properties of Pb 0.988 (Hf 0.945 Sn x Ti 0.03‐ x Nb 0.025 )O 3 ceramics (0 ≤ x ≤ 0.03, correspondingly abbreviated as H1, H2, H3, and H4) at the morphotropic phase boundary were systematically investigated. X‐ray diffraction results and P‐E hysteresis loops show that the dominate orthorhombic antiferroelectric phase and a small amount of the tetragonal FE phase coexist in Pb 0.988 (Hf 0.945 Sn x Ti 0.03‐ x Nb 0.025 )O 3 ceramics. As the Sn content increases, the antiferroelectricity is significantly enhanced, accompanied with an increased Curie temperature and sharply reduced peak dielectric constant. H1 and H2 experience an irreversible field‐induced AFE‐FE phase transition at the ambient temperature, and the transition from a metastable FE phase to the original AFE phase is observed in H2 when heated to 60°C. H3 and H4 experience an invertible AFE‐FE phase transition, along with an enhanced forward phase switching field E F . Moreover a decreased backward phase switching field E A for H4 is detected as the electric field increases due to the AFE/FE coexistence. These results reveal the unique phase transition characteristics of AFE materials near the phase boundary, which is helpful for better understanding of AFE/FE materials.