Electrical investigations of Bi-doped BaTiO3 ceramics as a function of temperature

Sareecha, N.; Shah, Wajid Ali; Mirza, Misbah; Maqsood, Asghari; Awan, M. S.

doi:10.1016/j.physb.2017.11.069

Cited by 31 publications

(28 citation statements)

References 40 publications

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“…The highest density among the studied samples reached 86.2% of its theoretical value and was obtained by ceramics sintered at 1225 °C with addition of 0.1 mol % Bi2O3. Passing through a maximum density with increasing bismuth content appeared to be typical for doped BaTiO3 ceramics [23,25]. The currently observed result was comparable to densification of Bi-doped BaTiO3 synthesized by a solid-state method with barium deficiency and sintered in a similar regimen [25].…”

Section: Phase Composition Of Bi 2 O 3 -Modified Batio 3 Ceramicssupporting

confidence: 70%

“…Passing through a maximum density with increasing bismuth content appeared to be typical for doped BaTiO 3 ceramics [23,25]. The currently observed result was comparable to densification of Bi-doped BaTiO 3 synthesized by a solid-state method with barium deficiency and sintered in a similar regimen [25]. Electronic Industries Alliance (EIA) standards for capacitors widely applied by the manufacturers avoid regulation of the mechanical characteristics of the ceramic dielectric layer contained in the device.…”

Section: Structural and Mechanical Properties Of Bi2o3-modified Batiosupporting

confidence: 53%

“…Some of the authors noted no diffuse character of the transition for the materials with bismuth content within its solubility limit [26]. However, in other works the diffused behavior even on changing to relaxor type was observed [23,25,27]. Shift of the Curie point and lowering of the corresponding dielectric constant discovered in the current work proved the diffuse nature of the tetragonal to cubic phase transition in BaTiO3 ceramics with addition of Bi2O3.…”

Section: Dielectric Properties Of Bi2o3-modified Batio3 Ceramicssupporting

confidence: 43%

“…As reported earlier, the use of Bi 2 O 3 additive to BaTiO 3 powder promoted ceramic densification owing to liquid phase formation during the sintering [23][24][25]. Bi 3+ ion is known to substitute aliovalently Ba 2+ in a perovskite lattice because of similar ionic radii (0.145 and 0.160 nm, respectively) [18,[23][24][25][26][27]. The solubility limit of Bi 3+ in BaTiO 3 was reported to reach 5 at % [28].…”

Section: Introductionmentioning

confidence: 72%

“…One of the typical modifications of BaTiO 3 ceramics is incorporation of Bi 3+ ions [16][17][18][19][20][21][22]. As reported earlier, the use of Bi 2 O 3 additive to BaTiO 3 powder promoted ceramic densification owing to liquid phase formation during the sintering [23][24][25]. Bi 3+ ion is known to substitute aliovalently Ba 2+ in a perovskite lattice because of similar ionic radii (0.145 and 0.160 nm, respectively) [18,[23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 89%

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Bi2O3-Modified Ceramics Based on BaTiO3 Powder Synthesized in Water Vapor

et al. 2020

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Bi2O3 was investigated in the role of a modifier for BaTiO3 powder synthesized in a water vapor atmosphere at 200 °C and 1.55 MPa. Modification was aimed at increasing the sinterability of the powder as well as improving the structural and dielectric properties of the obtained ceramics. The morphology and phase contents of the synthesized BaTiO3 powder were controlled by the methods of SEM and XRD. Properties of pure and Bi-doped BaTiO3 ceramics were comprehensively studied by XRD, SEM, dielectric spectroscopy, and standard approaches for density and mechanical strength determination. Doping with Bi2O3 favored BaTiO3 ceramic densification and strengthening. The room-temperature dielectric constant and the loss tangent of Bi-doped BaTiO3 were shown to stabilize within the frequency range of 20 Hz to 2 MHz compared to non-doped material. The drop of dielectric constant between room temperature and Curie point was significantly reduced after Bi2O3 addition to BaTiO3. Bi2O3 appeared to be an effective modifier for BaTiO3 ceramics produced from non-stoichiometric powder synthesized in water vapor.

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Section: Phase Composition Of Bi 2 O 3 -Modified Batio 3 Ceramicssupporting

confidence: 70%