Improved optical, dielectric, and nonlinear properties of CaCu3Ti4O12 thin films by chromium doping

Xue, Renzhong; Zhao, Liuyang; Chen, Ziyang; Cao, Bisong; Yuan, Chunyu; Xiao, Yifan

doi:10.1016/j.tsf.2023.139940

Cited by 4 publications

(2 citation statements)

References 57 publications

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“…The absorption peaks at 291, 356, 468, and 688 nm corresponded to σ-σ * , n-σ * , π-π * , and n-π * transitions, respectively [39]. The energy band gaps (E g ) of the samples were obtained by applying the Tauc method by using the following equation [40,41]:…”

Section: Resultsmentioning

confidence: 99%

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Enhanced dielectric response and non-Ohmic properties of Cd-doped Na_1/3Ca_1/3Bi_1/3Cu₃Ti₄O₁₂ ceramics

Xue,

Liu,

Zhao

et al. 2024

Phys. Scr.

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In this study, Na1/3(Ca1−xCdx)1/3Bi1/3Cu3Ti4O12 (x = 0, 0.2, 0.4, 0.8, and 1.0) ceramics were prepared via solid-state method. Effects of substitution of Ca2+ with Cd2+ on the microstructure, dielectric response, and non-Ohmic properties of Na1/3Ca1/3Bi1/3Cu3Ti4O12 ceramics were studied systematically. Results showed that all samples possessed single perovskite phase, in which grain size increased with the increase in Cd2+ doping content. Energy band gaps and activation energy first increased and then decreased, achieving their maxima (4.22 and 0.642 eV, respectively) at x = 0.2. Besides, dielectric constant of doped samples increased with the decrease in dielectric loss in frequency range of 40–106 Hz. Moreover, improvement in non-Ohmic properties was also observed with Cd2+ doping. The optimal dielectric properties (dielectric constant of ∼12,500, dielectric loss of ∼0.032 at 10 kHz, nonlinear coefficient of ∼3.42, and breakdown strength of ∼2.7 kV·cm−1) were achieved at x = 0.2. Dielectric response mechanism of ceramics followed internal barrier layer capacitor model while nonlinear ohmic properties were derived from Schottky barrier structure. Dielectric relaxation peaks at high temperatures (120 °C–220 °C) were associated with grain boundaries. Therefore, partial substitution of Ca2+ with Cd2+ can improve simultaneously dielectric and non-Ohmic properties of Na1/3Ca1/3Bi1/3Cu3Ti4O12 ceramics, which is conducive to their application in high-energy-density storage capacitors and varistors.

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Section: Resultsmentioning

confidence: 99%

“…Hz improved with the increase in Cd 2+ doping content. In the high-frequency (>10 6 Hz) range, the ε′ values of the samples decreased rapidly, which was associated with the Debye-related behavior[29,41,42]. The ε′ values at 10 kHz were 10,050, 12,500, 17,200, 22,820, and 38,350 at x = 0, 0.2, 0.4, 0.8 and 1.0, respectively.…”

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confidence: 97%

Enhanced dielectric response and non-Ohmic properties of Cd-doped Na_1/3Ca_1/3Bi_1/3Cu₃Ti₄O₁₂ ceramics

Xue,

Liu,

Zhao

et al. 2024

Phys. Scr.

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Modification of the dual-function varistor-capacitor properties of Bi2/3Cu3Ti4O12 ceramic by doping with Sr0.99La0.01TiO3

Xue,

Zhao,

Liu

et al. 2024

Materials Today Communications

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Enhanced optical, dielectric, and non-Ohmic properties in Ta-doped Bi2/3Cu3Ti4O12 ceramics

Xue,

Zhao,

Liu

et al. 2024

Solid State Sciences

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Improved optical, dielectric, and nonlinear properties of CaCu3Ti4O12 thin films by chromium doping

Cited by 4 publications

References 57 publications

Enhanced dielectric response and non-Ohmic properties of Cd-doped Na_1/3Ca_1/3Bi_1/3Cu₃Ti₄O₁₂ ceramics

Enhanced dielectric response and non-Ohmic properties of Cd-doped Na_1/3Ca_1/3Bi_1/3Cu₃Ti₄O₁₂ ceramics

Modification of the dual-function varistor-capacitor properties of Bi2/3Cu3Ti4O12 ceramic by doping with Sr0.99La0.01TiO3

Enhanced optical, dielectric, and non-Ohmic properties in Ta-doped Bi2/3Cu3Ti4O12 ceramics

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Improved optical, dielectric, and nonlinear properties of CaCu3Ti4O12 thin films by chromium doping

Cited by 4 publications

References 57 publications

Enhanced dielectric response and non-Ohmic properties of Cd-doped Na1/3Ca1/3Bi1/3Cu3Ti4O12 ceramics

Enhanced dielectric response and non-Ohmic properties of Cd-doped Na1/3Ca1/3Bi1/3Cu3Ti4O12 ceramics

Modification of the dual-function varistor-capacitor properties of Bi2/3Cu3Ti4O12 ceramic by doping with Sr0.99La0.01TiO3

Enhanced optical, dielectric, and non-Ohmic properties in Ta-doped Bi2/3Cu3Ti4O12 ceramics

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Enhanced dielectric response and non-Ohmic properties of Cd-doped Na_1/3Ca_1/3Bi_1/3Cu₃Ti₄O₁₂ ceramics

Enhanced dielectric response and non-Ohmic properties of Cd-doped Na_1/3Ca_1/3Bi_1/3Cu₃Ti₄O₁₂ ceramics