Structural and dielectric properties of Bi-doped barium strontium titanate nanopowders synthesized by sol–gel method

Sadeghzadeh‐Attar, Abbas; Sichani, Ehsan Salehi; Sharafi, S.

doi:10.1016/j.jmrt.2016.05.001

Cited by 60 publications

(10 citation statements)

References 36 publications

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“…In the present work steps were taken to improve the microstructural and dielectric properties of these BaTiO 3 ceramics by modification of the initial powder composition. 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].…”

Section: Introductionmentioning

confidence: 86%

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: Introductionmentioning

confidence: 86%

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

et al. 2020

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“…Meanwhile, the dielectric loss decreased as a result of balancing of the oxygen vacancies formed by doping, through reduction of free electrons. Te highest amounts of both dielectric constant and dielectric loss were lowered during elevation of Bi concentration [69].…”

Section: Efect Of Unidoping and Codoping On Dielectric Property Of Bs...mentioning

confidence: 92%

Multielement Doped Barium Strontium Titanate Nanomaterials as Capacitors

Balachandran

Kelele

Murthy

et al. 2023

Journal of Chemistry

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Due to the growing demand of energy and wastage of energy, there exists an interest of storing energy so that it could be utilized efficiently. Capacitors are materials designed for such an application. Ferroelectric materials are known for their application as capacitors. Of such materials, perovskites are the preferable classes of materials that have been used as capacitors. Barium strontium titanate nanomaterial is a member of perovskites which encompasses a smaller dielectric loss, elevated dielectric constant, and good thermal stability. Research studies also clarified that incorporating dopants into a barium strontium titanate nanomaterial of high dielectric materials including metal/metal oxides enhances their efficiency and effectiveness. Moreover, multielement doping or codoping has shown better dielectric properties as compared to the unidoping of BST. In this review, barium strontium titanate capacitors codoped with more than one metal/metal oxides have been studied most of which have shown that the codoped barium strontium titanate materials possess improved and sufficient dielectric properties to be utilized as capacitors. We believe that this work will have of its own contribution on understanding the doped barium strontium titanate nanomaterial by clarifying the most probable and detail reasons behind the enhancement of dielectric properties of codoped barium strontium titanate nanomaterials.

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“…This observation could be related to the finer grain structure of the sample BSS2 containing 2 mol% Sr and presence of secondary phases. It is well known that the dielectric constant of ceramics is sensitive to the morphology, crystal structure, phase composition, and the grain size [53][54][55]. Thus, smaller grain size due to the presence of secondary phases usually results in lower polarization and, therefore, gives lower value of dielectric constant.…”

Section: Other Secondary Phases Such As Sr 4 Si 4 O 12 and Sr 3 Si 3 Omentioning

confidence: 99%

Structure and dielectric behaviour of Sr-modified Bi4Si3O12 thin films prepared via sol gel method

Sadeghzadeh‐Attar

Hajijafari-Bidgoli

Reza

2018

PAC

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Bismuth silicate (Bi 4 Si 3 O 12 , BSO) nanostructured films containing 0, 1, 2, and 3 mol% Sr were prepared via sol-gel method and annealed at different temperatures up to 700°C. The effects of Sr content on the structure and morphology of prepared films were investigated. SEM images showed that surfaces of the prepared films were dense, smooth and homogeneous. The average particle size was changed from 30 to 35 nm as the annealing temperature was increased from 500 to 700°C. Variation of the dielectric constant and dielectric loss as a function of frequency and annealing temperature for the synthesized thin films with different content of Sr were also studied. The dielectric constant and dielectric loss decrease with Sr addition, and reach the minimum for the sample containing 2 mol% Sr. These changes could be attributed to the crystal structure and formation of secondary phases.

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Structural and dielectric properties of Bi-doped barium strontium titanate nanopowders synthesized by sol–gel method

Cited by 60 publications

References 36 publications

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

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

Multielement Doped Barium Strontium Titanate Nanomaterials as Capacitors

Structure and dielectric behaviour of Sr-modified Bi4Si3O12 thin films prepared via sol gel method

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