Title :
Phenomenological and structural studies of the morphotropic phase boundary in lead zinc niobate (PZN)-lead titanate (PT)
Author :
Yamamoto, Takashi ; Okino, Hirotake ; Oka, Hideki
Author_Institution :
Dept. of Commun. Eng., Nat. Defense Acad., Yokosuka, Japan
Abstract :
Unknown dielectric stiffness coefficients in the elastic Gibbs free energy for Pb(Zn13/Nb23/)O3-PbTiO3 (PZN-PT) binary solid solution with monoclinic phase were estimated by fitting the calculated phase diagram with the available experimental one. The connecting coefficients of polarization of tetragonal and rhombohedral in a spontaneous polarization were determined by fitting the temperature change of lattice parameters in 0.91PZN-0.09PT to the calculated one. The calculated PZN-PT phase diagram using the newly estimated dielectric stiffness coefficients was in good agreement with the experimental one. The dielectric constants could be calculated at the composition near the MPB in PZN-PT.
Keywords :
crystal structure; dielectric polarisation; ferroelectric transitions; free energy; lattice constants; lead compounds; permittivity; phase diagrams; piezoelectric materials; Pb(Zn0.33Nb0.66)O3-PbTiO3; binary solid solution; connecting coefficients; dielectric constants; dielectric stiffness coefficients; elastic Gibbs free energy; lattice parameters; monoclinic phase; morphotropic phase boundary; phase diagram; phenomenological study; polarization; rhombohedral phase; spontaneous polarization; structural study; tetragonal phase; Dielectrics; Joining processes; Lead; Niobium compounds; Phase estimation; Polarization; Solids; Temperature; Titanium compounds; Zinc;
Conference_Titel :
Applications of Ferroelectrics, 2004. ISAF-04. 2004 14th IEEE International Symposium on
Print_ISBN :
0-7803-8410-5
DOI :
10.1109/ISAF.2004.1418373
