Colossal dielectric permittivity and relevant mechanism of Bi2/3Cu3Ti4O12 ceramics

Yang, Longhai; Huang, Gemeng; Wang, Tingting; Hao, Haiyan; Tian, Ye

doi:10.1016/j.ceramint.2016.03.094

Cited by 23 publications

(7 citation statements)

References 16 publications

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“…[45][46][47] It is worth noting that the value of ∆E g.b. for the NLCTO-75 is similar to the reported values of Bi 2/3 Cu 3 Ti 4 O 12 [50] and La 3+ and Nb 5+ co-doped CCTO [51] ceramics. The low value of ∆E g.b.…”

Section: Resultssupporting

confidence: 86%

Electrical and dielectric properties of Na _1/2 La _1/2 Cu ₃ Ti ₄ O ₁₂ ceramics prepared by high energy ball-milling and conventional sintering

Mahfoz-Kotb

Ahmad

2016

Chinese Phys. B

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We report on the measurements of the electrical and dielectric properties of Na 1/2 La 1/2 Cu 3 Ti 4 O 12 (NLCTO) ceramics prepared by high energy ball-milling and conventional sintering without any calcination steps. The x-ray powder diffraction analysis shows that pure perovskite-like CCTO phase is obtained after sintering at 1025 • C-1075 • C. Higher sintering temperatures result in multi-phase ceramics due to thermal decomposition. Scanning electron microscope observations reveal that the grain size is in a range of ∼ 3 µm-5 µm for these ceramics. Impedance spectroscopy measurements performed in a wide frequency range (1 Hz-10 MHz) and at various temperatures (120 K-470 K) are used to study the dielectric and electrical properties of NLCTO ceramics. A good compromise between high ε (5.7 × 10 3 and 4.1 × 10 3 at 1.1 kHz and 96 kHz, respectively) and low tan δ (0.161 and 0.126 at 1.1 kHz and 96 kHz, respectively) is obtained for the ceramic sintered at 1050 • C. The observed high dielectric constant behavior is explained in terms of the internal barrier layer capacitance effect.

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Section: Resultssupporting

confidence: 86%

Electrical and dielectric properties of Na _1/2 La _1/2 Cu ₃ Ti ₄ O ₁₂ ceramics prepared by high energy ball-milling and conventional sintering

Mahfoz-Kotb

Ahmad

2016

Chinese Phys. B

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“…Yang et al used the solid-state method to create a series of high-density BCTO and obtained a high dielectric permittivity of ≈3.39 × 10 7 at 1 kHz. [17] In a Bi 2/3 Cu 3 Ti 4 O 12 /Bi 3 LaTi 3 O 12 nanocomposite, P. Gautam and co-workers observed a dielectric constant value of 13.94 × 10 3 and a dielectric loss of ≈2.4 at 503 K. [18] Pooja et al investigated the dielectric characteristics of BCTO manufactured through the semiwet approach in the frequency range 100 Hz-1 MHz and found a high dielectric constant (𝜖 r ≈8 × 10 3 ), while the minimum value of the dielectric loss is ≈9 at 1 kHz. [19] Because of the substantial tangent loss (tan 𝛿) of BCTO, they are inappropriate for capacitor applications.…”

Section: Introductionmentioning

confidence: 99%

Phase Evolution, Dielectric, and Electric Behavior of Sm‐Doped BCTO Ceramic Fabricated by Semi‐Wet Method

Prajapati,

Rai,

Kumar

et al. 2024

Cryst. Res. Technol.

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Bi(2/3)‐xSmxCu3Ti4O12 (BSCTO x = 0.05, 0.10, and 0.20) ceramics are synthesized using semi‐wet technique and an extensive investigation into their structural, morphological, and elemental properties, alongside dielectric and impedance behaviors, is meticulously carried out. X‐ray powder diffraction analysis unequivocally confirmed the formation of a monophasic BCTO cubic phase without any discernible secondary phases. and the crystallite size of the BSCTO ceramic, obtained by X‐ray diffraction using Debye Scherrer formula, range from 62 to 81 nm. Rietveld analysis reveals that ceramics have a body centered cubic structure with space group Im‐3. The Scanning electron microscope image displays the dense microstructure of the ceramics, while EDX analysis unveils the elemental composition of resulting products. Doping with Sm3+ induced a notable reduction in grain size, as observed through Scanning electron microscope and Atomic Force Microscope analyses, indicating Sm3+ hindered grain growth during sintering, potentially resulting in reduced dielectric constant (ε′). Dielectric constant and dielectric loss of the composition (x = 0.2) are found to be ≈152 and 0.04, respectively at room temperature (1 kHz). Impedance characteristics revealed a substantial increase in grain boundary resistance, leading to improved dielectric loss. The AC conductivity of BSCTO ceramics exhibited a frequency‐dependent increase satisfying to Johncher's power law.

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“…22 Another interesting class of materials that possess large ε ′ are CaCu 3 Ti 4 O 12 23 and Bi 2/3 Cu 3 Ti 4 O 12 . 24 Notably, they are non-polar systems and are of immense technological interest as they exhibit a colossal dielectric constant (CDC) with ε ′ > 10 5 . Initially, the origin of CDC was attributed to extrinsic parameters such as the interfacial effect (sample electrode) and the Maxwell–Wagner effect (grain boundaries).…”

Section: Introductionmentioning

confidence: 99%

Relaxor ferroelectric-like glassy dielectric dispersion in the triple perovskite Ba₃CoSb₂O₉

Kumar,

Nathawat,

Yogi

et al. 2024

Phys. Chem. Chem. Phys.

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Colossal dielectric permittivity and relevant mechanism of Bi2/3Cu3Ti4O12 ceramics

Cited by 23 publications

References 16 publications

Electrical and dielectric properties of Na _1/2 La _1/2 Cu ₃ Ti ₄ O ₁₂ ceramics prepared by high energy ball-milling and conventional sintering

Electrical and dielectric properties of Na _1/2 La _1/2 Cu ₃ Ti ₄ O ₁₂ ceramics prepared by high energy ball-milling and conventional sintering

Phase Evolution, Dielectric, and Electric Behavior of Sm‐Doped BCTO Ceramic Fabricated by Semi‐Wet Method

Relaxor ferroelectric-like glassy dielectric dispersion in the triple perovskite Ba₃CoSb₂O₉

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Colossal dielectric permittivity and relevant mechanism of Bi2/3Cu3Ti4O12 ceramics

Cited by 23 publications

References 16 publications

Electrical and dielectric properties of Na 1/2 La 1/2 Cu 3 Ti 4 O 12 ceramics prepared by high energy ball-milling and conventional sintering

Electrical and dielectric properties of Na 1/2 La 1/2 Cu 3 Ti 4 O 12 ceramics prepared by high energy ball-milling and conventional sintering

Phase Evolution, Dielectric, and Electric Behavior of Sm‐Doped BCTO Ceramic Fabricated by Semi‐Wet Method

Relaxor ferroelectric-like glassy dielectric dispersion in the triple perovskite Ba3CoSb2O9

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Electrical and dielectric properties of Na _1/2 La _1/2 Cu ₃ Ti ₄ O ₁₂ ceramics prepared by high energy ball-milling and conventional sintering

Electrical and dielectric properties of Na _1/2 La _1/2 Cu ₃ Ti ₄ O ₁₂ ceramics prepared by high energy ball-milling and conventional sintering

Relaxor ferroelectric-like glassy dielectric dispersion in the triple perovskite Ba₃CoSb₂O₉