Dielectric, impedance and modulus spectroscopy of Pb(Zr_0.52−x Ce _x Ti_0.48)O₃ (x = 0.00, 0.10) ferroelectric ceramics

Abstract

Lead zirconate titanate (PZT) ceramics of morphotropical phase boundary (MPB) composition shows enhanced physical properties on modification with suitable ions. In this work, Pb(Zr0.52-xCe x Ti0.48)O3, x = 0.00, 0.10 (PZCT) ferroelectric ceramics have been synthesized by solid state synthesis route. The ferroelectric nature of samples is confirmed by their transition of phase from the ferroelectric phase to the paraelectric phase. At 1 MHz frequency, the Curie temperature (T c ) of the material is slightly decreased to ∼375 °C from ∼377 °C. But at the aforementioned frequency, the magnitude of relative dielectric constant (ϵ r ) has been enhanced to ∼282 from ∼264 due to the substitution of cerium (Ce+4) ions at the zirconium site. Even at higher frequencies ranging from 1 kHz to 1 MHz, Ce modified PZT has shown negligible tangent loss (tan δ) upto 350 °C. The electrical response of the material is mainly governed by grain interiors only not by grain boundaries and electrode-interface. Electric modulus formalism analysis confirmed the occurrence of non-Debye type of electrical relaxation phenomenon in the material. The electrical conduction of the material is a thermally activated phenomenon, and it is governed by Jonscher's power law. The decrease in resistance of the compounds, with rise in temperature, indicate their semiconductor behavior (i.e. negative temperature coefficient of resistance behavior) at higher temperatures.

Investigation on the Electrical Conductivity of PZT Modified by Manganese and Cerium

“…With rise in temperature, the conductivity of all samples in increasing indicating the presence of peaks at higher temperatures. These peaks correspond to the dielectric relaxation peaks that can observed near Curie temperature region [7,23]. The increment in conductivity with rise in temperature suggests the semiconducting nature i.e.…”

“…The inorganic oxides of 99.9% purity were used to prepare the samples of Pb(Zr 0.52-x Y x Ti 0.48 )O 3 (x = 0.00, 0.10 and Y = Mn/Ce). The complete procedure and process parameters are similar to that, which have been reported elsewhere [22][23].…”

“…PZT thin film, doped with Mn and Sb, has been suggested for IR detectors due to good IR sensitivity and high pyroelectric coefficient [22]. It is also observed that there is change in the size, shape and distribution of grains, over the surfaces of Ce modified 65/35 PZT [23]. The conductivity nature PZT, PZMT and PZCT samples has been studied, and presented in this paper.…”

Review on Different Preparation Techniques of Lead Zirconate Titanate

“…Lots of work has been reported by lots of researchers, on the solid state synthesized PZT ceramics. In one of the work [4], PZT of 52/48 ratio has been prepared by modifying it with cerium. It was observed that the relative permittivity of the PZT has been enhanced.…”

“…It is concluded that the interesting electrical properties can be induced by PZT, when it is synthesized through solid state mixing of powders. For more understanding on this method, bibliography can be referred [1][2][3][4][5][6][7][8][9][10][11].…”