Effect of the Mn doping concentration on the dielectric and ferroelectric properties of different-routes-fabricated BaTiO3-based ceramics

Chen, Wei; Zhao, Xia; Sun, Junjie; Zhang, Lixue; Zhong, Lisheng

doi:10.1016/j.jallcom.2016.01.187

Cited by 50 publications

(16 citation statements)

References 33 publications

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“…In experimental investigations of doped systems, three phenomena are often observed as the consequences of doping: (i) Strong change of the hysteresis loop; (ii) Diffused and/or smeared dielectric permittivity with respect to temperature; (iii) Variations of phase transition temperatures 24,25,[30][31][32][33][34][35][36][37] . Moreover, it is also known from experiments that doping Fe or Mn into BaTiO 3 in general makes ferroelectric materials easier to reverse [38][39][40][41] . Since the doping effects can be significant even with minuscule doping, the origin of such effects naturally attracts great scientific attention.…”

Section: Introductionmentioning

confidence: 99%

Understanding doped perovskite ferroelectrics with defective dipole model

Liu

Jin

Jiang

et al. 2018

The Journal of Chemical Physics

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While doping is widely used for tuning physical properties of perovskites in experiments, it remains a challenge to exactly know how doping achieves the desired effects. Here, we propose an empirical and computationally tractable model to understand the effects of doping with Fe-doped BaTiO 3 as an example. This model assumes that the lattice sites occupied by Fe ion and its nearest six neighbors lose their ability to polarize, giving rise to a small cluster of defective dipoles. Employing this model in Monte-Carlo simulations, many important features like reduced polarization and the convergence of phase transition temperatures, which have been observed experimentally in acceptor doped systems, are successfully obtained. Based on microscopic information of dipole configurations, we provide insights into the driving forces behind doping effects and propose that active dipoles, which exist in proximity to the defective dipoles, can account for experimentally observed phenomena. Close attention to these dipoles are necessary to understand and predict doping effects.

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Section: Introductionmentioning

confidence: 99%

Understanding doped perovskite ferroelectrics with defective dipole model

Liu

Jin

Jiang

et al. 2018

The Journal of Chemical Physics

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“…The relaxation time τ M À Á can be calculated from M 00 using the relation τ M ¼ 1 ω max . The variation of ln τ M as a function of 1000/T shows a linear trend and is well fitted by the Arrhenius relation given as follows: 11) where the symbols have their usual meanings. The activation energy E M calculated by least square fitting is found to be ≈ 0.86 eV and 1.06 eV for the BCT and BCMT samples, respectively.…”

Section: Electric Modulus Analysismentioning

confidence: 78%

“…This implies that the solubility of Mn in BCT is ≤4 atomic %. Phan et al and Chen et al also reported the presence of the hexagonal BT phase at 2% and 1.3% Mn doping in BT, indicating that Ca addition had enhanced the Mn solubility [11,12].…”

Section: Structural Propertiesmentioning

confidence: 94%

Small polaron hopping-assisted electrical conduction and relaxation in BCT and Mn-doped BCT samples

Chawla

Singh

et al. 2019

Journal of Asian Ceramic Societies

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Polycrystalline samples of Ba 0.96 Ca 0.04 TiO 3 (BCT) and Ba 0.96 Ca 0.04 Ti 0.96 Mn 0.04 O 3 (BCMT) were synthesized using the solid-state reaction route. XRD analysis confirmed the presence of the tetragonal phase in both as well as an additional hexagonal phase in the BCMT samples. The wt % of the segregated phase was found to be ≈8.96% using Rietveld refinement. SEM micrographs showed an increase in the density and a decrease in the grain size of the BCMT sample. P-E measurements confirmed higher remnant polarization in the BCT samples. A single depressed semicircle was observed in the Nyquist plots indicating non-Debye-type behavior and overlapping contributions of the grains and grain boundaries. The increase in the value of the conductivity exponent "n" (and n < 1) with temperature suggested that the electrical conduction mechanism was non-overlapping small polaron tunneling. The electron acceptor nature of the Mn ions and lower grain size of the BCMT samples resulted in higher activation energy as compared to the BCT samples.

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“…Research has been carried out over the many decades to modify barium titanate and sodium bismuth titanate ceramics with suitable ions doping at lattice sites [1][2][3][4][5][6][7][8][9][10][11][12]. Solid solution of the above these compounds has also studied to enhance the various properties including the electrical, electromechanical and piezoelectric properties.…”

Section: Introductionmentioning

confidence: 99%

Enhanced dielectric and piezoelectric properties in multi-ferroic ceramics [Ba(Nd0.1Ti0.8Nb0.1)O3](1−x)[Na0.5Bi0.5TiO3]x

et al. 2020

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The effect of NBT content on the dielectric and piezoelectric properties in multi-ferroic ceramics [Ba(Nd 0.1 Ti 0.8 Nb 0.1) O 3 ] (1−x) [Na 0.5 Bi 0.5 TiO 3 ] x has been studied. Ceramic compositions with x = 0.00, 0.25 and 0.65 were prepared through conventional solid state sintering route. Ceramic composition with high NBT content (x = 0.65) has shown twice the value of diffusiveness of phase transition when compared to without it. The electromechanical coupling conversion of 54-69% was observed at room temperature. These ceramic samples also studied at higher temperature (673-898 K) exhibited greater than 90% electromechanical coupling conversion. These materials also studied at higher temperatures (673-898 K) showed piezoelectric charge constant of the order of nm V −1 when compared to at RT which in turn has the value of the order of pm V −1. Enhanced piezoelectric charge constant at elevated temperatures and with the increase in NBT content is attributed to the field-induced strains happening due to the presence of polarized oxygen vacancies. The results indicate that the present ceramics are best suited for high-temperature transducer application.

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Effect of the Mn doping concentration on the dielectric and ferroelectric properties of different-routes-fabricated BaTiO3-based ceramics

Cited by 50 publications

References 33 publications

Understanding doped perovskite ferroelectrics with defective dipole model

Understanding doped perovskite ferroelectrics with defective dipole model

Small polaron hopping-assisted electrical conduction and relaxation in BCT and Mn-doped BCT samples

Enhanced dielectric and piezoelectric properties in multi-ferroic ceramics [Ba(Nd0.1Ti0.8Nb0.1)O3](1−x)[Na0.5Bi0.5TiO3]x

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