Composition Dependent Electrical Properties of (Ba_1−xCa_xZr_0.1Ti_0.9)O₃ Ceramics, Near Morphotropic Phase Boundary (0.140 ≤ x ≤ 0.160)

Abstract

In this work, pellet samples of (Ba1−xCaxZr0.1Ti0.9)O3, (0.140 ≤ x ≤ 0.160) were prepared using solid-state reaction route with double sintering. The dielectric and structural properties of the prepared samples were measured, from room temperature to 250 °C, at different frequencies, in the range 10–1000 KHz. A peak shifting anomaly in the X-ray diffraction peaks patterns, an anomalous change in the slope of c/a vs x plot, and the observed minimum values of dielectric constant, loss and conductivity of the prepared compositions show a strong compositional dependent dielectric and structural properties, indicating a morphotropic phase transition type behavior, at the composition with x = 0.150.

Annealing Temperature-Dependent Structural, Optical, and Electrical Properties of [(Ba1−zCaz)(Zr0.1Ti0.9)O3], (z = 0.155), Films

“…These lead-free perovskite solid solutions have attracted researchers due to their large dielectric-and piezo-constant, etc, and exceptionally extreme properties at specific compositions-near the morphotropic phase boundary (MPB). [22][23][24][25][26][27][28][29] Near the MPB, a composition-dependent transition and irregular variation in lattice parameters cause the extremal physical properties. [22][23][24][25][26][27][28][29] A MPB has been reportedly observed, at composition (Ba 1−z Ca z )(Zr 0.1 Ti 0.9 )O 3 , in the barium calcium zirconate titanate ((Ba,Ca)(Zr,Ti)O 3 ) system (BCZT system).…”

“…[22][23][24][25][26][27][28][29] Near the MPB, a composition-dependent transition and irregular variation in lattice parameters cause the extremal physical properties. [22][23][24][25][26][27][28][29] A MPB has been reportedly observed, at composition (Ba 1−z Ca z )(Zr 0.1 Ti 0.9 )O 3 , in the barium calcium zirconate titanate ((Ba,Ca)(Zr,Ti)O 3 ) system (BCZT system). 22 With varying z, different (Ba 1−z Ca z )(Zr 0.1 Ti 0.9 )O 3 compositions may be prepared, which may exhibit the numerous possibility of replacing the lead-based ceramics in several ferroelectric and dielectric devices.…”

Impedance Spectroscopy and AC Conductivity Analysis of (Ba1−kCak)(Zr0.1Ti0.9)O3, (0.140 ≤ k ≤ 0.160), Ceramics

“…The electrical conductivity is frequency independent in the low frequency zone at a given temperature, and the value increases as the temperature rises, which is related to the DC conductivity of semiconducting materials. 6 At low frequencies, the electric field is unable to disrupt the hopping process, and the long-range mobilizations of charge carriers are responsible for such a plateau region. At higher temperatures, this effect is more pronounced.…”

“…A large variety of BaTiO 3 solid solution solutions have been explored. [5][6][7][8][9][10] One of the important compound is barium calcium zirconate titanate (Ba 1−k Ca k )(Zr 1−z Ti z )O 3 . They were used extensively owing to their large dielectric and piezoelectric constant.…”

“…The preparation methodology of BCZT ceramics and their dielectric properties, structure, SEM images, piezoelectric properties has been described in a previous communication. 6…”