Effects of Bi4Ti3O12 addition on the microstructure and dielectric properties of modified BaTiO3 under a reducing atmosphere

Jain, T. A.; Chen, Chung‐Cheng; Fung, Kuan‐Zong

doi:10.1016/j.jeurceramsoc.2009.02.015

Cited by 28 publications

(9 citation statements)

References 23 publications

(23 reference statements)

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“…Jain [13]. Compared with the results in literature [14], the Tc was a bit higher after adding Yb 2 O 3 . On the basis of literature [15,16], it can be found that Yb 3?…”

Section: Methodscontrasting

confidence: 47%

Lead-free PTCR ceramics based on ytterbium doped (1 − x)BaTiO3-xBi4Ti3O12

Wei

et al. 2011

J Mater Sci: Mater Electron

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Ytterbium (Yb)-doped (1 -x)BaTiO 3 -xBi 4-Ti 3 O 12 (abbreviated as BT-BIT, where x = 0, 0.005, 0.01, 0.015, 0.02 and 0.03) semiconducting ceramics were fabricated by the conventional mixed oxide method, all the samples were sintered in a pure N 2 atmosphere and annealed in air for several hours. The Curie temperature (Tc) firstly increased and then decreased with the increase of BIT, which corresponded to the trend of c/a value. In addition, the effect of Yb 3? on the PTCR was also investigated. It was found that the Curie temperature was shifted to a higher level and the dielectric constant decreased with the increase of Yb 3? .

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“…Jain [13]. Compared with the results in literature [14], the Tc was a bit higher after adding Yb 2 O 3 . On the basis of literature [15,16], it can be found that Yb 3?…”

Section: Methodscontrasting

confidence: 47%

Lead-free PTCR ceramics based on ytterbium doped (1 − x)BaTiO3-xBi4Ti3O12

Wei

et al. 2011

J Mater Sci: Mater Electron

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“…Large amounts of Bi were found at the grain boundaries but the existence of Bi 4 Ti 3 O 12 was not affirmative. Bi 4 Ti 3 O 12 addition of Mn‐modified BaTiO 3 was investigated by Jain et al 6 and the Curie point shifted to a high temperature, from 123° to 131°C, when the Bi 4 Ti 3 O 12 content was increased from 0 to 3 mol%. However, Bi doping of BaTiO 3 induced a slight decrease in T c according to Bahri's work 7 .…”

Section: Introductionmentioning

confidence: 99%

Effects of Bi₂O₃ and Yb₂O₃ on the Curie Temperature in BaTiO₃‐Based Ceramics

Yao

Wang

Yang

et al. 2010

Journal of the American Ceramic Society

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Effects of doping Bi2O3 and Yb2O3 into BaTiO3‐based ceramics were investigated. The Curie temperature shifted to a higher point with an increasing BiYbO3. Yb plays a major role and Bi has no influence on the Curie point, but Bi2O3 is important because it can hinder the diffusion of other dopants and avoid the destruction of the “core–shell” structure. Moreover, the excess Bi2O3 addition enhances the effect of Yb2O3 on shifting Tc. X‐ray diffraction analysis indicated that the c/a ratio increased with the increasing of BiYbO3. The rise of the Curie temperature is attributed to an internal stress caused by the lattice mismatch between grain cores and grain shells. The dielectric properties can also be explained by the “core–shell” structure.

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“…The key way to achieve low temperature coefficient of dielectric properties is the formation of a "core-shell" microstructure [18], which could be controlled by changing the species and concentration of the dopant [5]. The grain growth inhibition [19] and liquid-phase sintering [20] also play important roles in the formation of coreshell structure, and have been extensively studied with BT-based ceramics [21,22]. A dissolution-precipitation mechanism was proposed regarding the formation of core-shell microstructure in BT ceramics with addition of CdBi 2 Nb 2 O 9 [23].…”

Section: Introductionmentioning

confidence: 99%