Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/31027
Title: Relationship between dielectric properties and structural long-range order in (x)Pb(In1/2Nb1/2)O3:(1 - x)Pb(Mg1/3Nb2/3)O3 relaxor ceramics
Authors: Tai, CW
Baba-Kishi, KZ
Keywords: Electroceramics
Ferroelectricity
Oxides
Perovskites
Transmission electron microscopy (TEM)
Issue Date: 2006
Source: Acta materialia, 2006, v. 54, no. 20, p. 5631-5640 How to cite?
Journal: Acta Materialia 
Abstract: The dielectric and structural order-disorder properties of as-sintered complex perovskite (x)Pb(In1/2Nb1/2)O3:(1 - x)Pb(Mg1/3Nb2/3)O3 ceramics are highly influenced by the quantity of Pb(In1/2Nb1/2)O3 (PIN). A high PIN quantity causes the relative permittivity maxima (εmax) to decrease and the temperature (Tmax) to increase. Also, strong frequency dispersion is dominant in the relative permittivity when plotted against the temperature. In ferroelectric hysteresis loop measurements, the maximum values of electric displacements (Dmax) decrease with increasing PIN. The ceramics in the composition range x = 0.1-0.8 behave as ferroelectric relaxors and exhibit very slim hysteresis loops for all these compositions. Transmission electron microscopy (TEM) studies show that the size of the 1:1 structural ordered domains is influenced by the PIN quantity. The relationship between the dielectric properties and the long-range 1:1 order in these relaxors appear to be in conflict with the commonly accepted order-disorder behavior in complex perovskite ferroelectrics, in which large structural domains correspond with the tendency to depart from the relaxor state. TEM observations show that individual 1:1 ordered domains in (x)PIN:(1 - x)PMN ceramics are composed of numerous nano-sized ordered domains, separated by fine antiphase boundaries.
URI: http://hdl.handle.net/10397/31027
ISSN: 1359-6454
DOI: 10.1016/j.actamat.2006.08.010
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