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Structure‐property relationships in BiScO 3 –PbTiO 3 –PbMg 1/3 Nb 2/3 O 3 ceramics near the morphotropic phase boundary
Author(s) -
Talanov Mikhail V.,
Bush Alexander A.,
Кamentsev Konstantin E.,
Sirotinkin Vladimir P.,
Segalla Andrei G.
Publication year - 2018
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.15225
Subject(s) - phase boundary , materials science , tetragonal crystal system , ferroelectricity , monoclinic crystal system , phase diagram , dielectric , condensed matter physics , solid solution , phase transition , phase (matter) , crystallography , crystal structure , physics , chemistry , optoelectronics , metallurgy , quantum mechanics
The phase structure, dielectric, ferroelectric, and piezoelectric properties of (1−2 x )BiScO 3 – x PbTiO 3 – x PbM g 1/3 Nb 2/3 O 3 ceramics ( x = 0.30‐0.46) were studied. It was found that an increase in x leads to a structural phase transition between the rhombohedral and tetragonal phase via an intermediate monoclinic phase and to a crossover from the nonergodic relaxor state to the ferroelectric one. It was proposed that at x > 0.42 the phase transition changes from second to first order. The assumption about the existence of a tricritical point on the phase diagram at x ≈ 0.42 with the enhanced dielectric response has been made. The observed structure‐property relationships of the studied solid solutions are discussed. It is shown that the solid solutions with x = 0.42 are characterized by the high piezoelectric parameters ( d 33 = 509 pC /N, d 31 = −178 pC/N, d h = 153 pC/N), which makes possible their applications in sonar equipment.