6533b855fe1ef96bd12b1b34

RESEARCH PRODUCT

Structure and properties of high piezoelectric coupling Pb(B′½Nb½)O3-PbTiO3binary systems

M. LivinshJ.y. YamashitaMaija AntonovaIvan ShorubalkoAndris SternbergL. Shebanovs

subject

Phase transitionTetragonal crystal systemPhase boundaryMaterials sciencePhase (matter)Analytical chemistryAntiferroelectricityOrthorhombic crystal systemCondensed Matter PhysicsPiezoelectricityElectronic Optical and Magnetic MaterialsPhase diagram

description

Abstract The (1-x)Pb(Lu½ Nb½)O3-xPbTiO3 and (1-x)Pb(Er½ Nb½)O3-xPbTiO3 binary systems have been obtained, the structure and properties of which are studied. The unit cell of erbium niobate (PErN) is described as pseudomonoclinic of orthorhombic Bmm2 symmetry: a=c=4.2161 A b=4.0869 A β=90.55° and composition is characterized with antiferroelectric phase transition at 305°C. The PErNT system has the morphotropic phase region extending over the x=0.4–0.6 interval. In PLuNT ceramics system the pseudomonoclinic phase structure Bmm2 extending over the 0≤x ≤0.38 interval becomes pseudocubic at x≈ 0.2. The morphotropic region is spread over 0.38< × < 0.49; at higher PT concentrations (1.0 ≥ × ≥ 0.49) the structure transfers to the tetragonal P4mm phase. The maximum values of the electromechanical coupling coefficients kp=0.66, kt=0.48, k31=0.35 were attained in compositions PLuNT 59/41 near the morphotropic phase boundary.

yearjournalcountryeditionlanguage
1999-03-01Ferroelectrics
https://doi.org/10.1080/00150199908210560