Stabilization of the Perovskite Phase and Electrical Properties of Ferroelectrics in the Pb2(Sc,Nb)O6 System

Title & Authors
Stabilization of the Perovskite Phase and Electrical Properties of Ferroelectrics in the Pb2(Sc,Nb)O6 System
Kim, Yeon Jung;

Abstract
Ferroelectric $\small{Pb_2(Sc,Nb)O_6}$ were prepared under two different sintering conditions using the oxide mixing method and the electrical properties were measured. The sintering conditions were $\small{1350^{\circ}C}$ for 25 minutes and $\small{1400^{\circ}C}$ for 20 minutes. EDX spectroscopy and XRD were used to determine the crystalline characteristic of the $\small{Pb_2(Sc,Nb)O_6}$ compositions Pyrochlore phase showed about 2% in all $\small{Pb_2(Sc,Nb)O_6}$ specimens. It expands the growth of crystals in samples sintered at $\small{1400^{\circ}C}$ than $\small{1350^{\circ}C}$, but all samples were the optimal crystallization. The temperature and frequency dependence of the complex dielectric constant and admittance were measured to analyze the electrical properties. The high dielectric constant of the specimens reflects the good stoichiometry and crystallization. The maximum value of the dielectric constant in the two specimens treated with sintering at $\small{1350^{\circ}C}$ and $\small{1400^{\circ}C}$ were more than 27,000, and the dielectric loss at room temperature is smaller than 0.05. The maximum dielectric constant decreased with increasing frequency, the transition temperature also increased in $\small{Pb_2(Sc,Nb)O_6}$ compositions. The admittance and susceptance values reach a peak at all temperatures, and the magnitude of the peak increases with increasing measuring temperature. Strong frequency dependent of maximum admittance, susceptance, dielectric constant and dielectric loss were observed.
Keywords
$\small{Pb_2(Sc,Nb)O_6}$;Ferroelectric;Relaxor;Dielectric constant;Admittance;
Language
English
Cited by
1.
Dielectric Characteristics of PbSc1/2Nb1/2O3 Prepared by Using the One-step Solid State Reaction,;

Applied Science and Convergence Technology, 2016. vol.25. 4, pp.77-80
1.
Dielectric Characteristics of PbSc1/2Nb1/2O3Prepared by Using the One-step Solid State Reaction, Applied Science and Convergence Technology, 2016, 25, 4, 77
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