THERMODYNAMIC NATURE OF PHASE-TRANSITIONS IN PB(ZRXTI1-X)O-3 CERAMICSNEAR THE MORPHOTROPIC PHASE-BOUNDARY .2. DIELECTRIC AND PIEZOELECTRICSTUDIES

Authors
MISHRA SK PANDEY D
Citation
Sk. Mishra et D. Pandey, THERMODYNAMIC NATURE OF PHASE-TRANSITIONS IN PB(ZRXTI1-X)O-3 CERAMICSNEAR THE MORPHOTROPIC PHASE-BOUNDARY .2. DIELECTRIC AND PIEZOELECTRICSTUDIES, Philosophical magazine. B. Physics of condensed matter. Statistical mechanics, electronic, optical and magnetic, 76(2), 1997, pp. 227-240
Citations number
18
Categorie Soggetti
Physics, Applied",Mechanics,"Physics, Condensed Matter","Material Science
Journal title
Philosophical magazine. B. Physics of condensed matter. Statistical mechanics, electronic, optical and magnetic → ACNP
ISSN journal
13642812
Volume
76
Issue
2
Year of publication
1997
Pages
227 - 240
Database
ISI
SICI code
1364-2812(1997)76:2<227:TNOPIP>2.0.ZU;2-O
Abstract
From a study of the temperature dependence of the dielectric constant of Pb(ZrxTi1-x)O-3 the ferroelectric transition for 0.515 less than or equal to 0.535 is shown to be discontinuous in nature while it is con tinuous for x = 0.550. It is proposed that there may be a tricritical point around x = 0.545. The two-phase nature of the morphotropic phase boundary (MPB) has been confirmed from the temperature dependence of the resonance frequency. The temperature variation in the planar coupl ing coefficient k(p) is correlated with structural changes to show tha t the maximum k(p) at a given Zr concentration x is a function of temp erature T and occurs in the tetragonal phase field just outside the tw o-phase MBP region in the (x,T) plane.