Structural, dielectric and optical properties of [(BZT–BCT)-(epoxy-CCTO)] composites

Mishra, Partha Narayan; Kumar, P.

doi:10.1016/j.ceramint.2014.10.087

Cited by 14 publications

(4 citation statements)

References 31 publications

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“…No extra secondary impurity phases were detected with increasing Ca 2+ ions content. [30][31][32] Weak diffraction peaks observed in Fig. 1 are not from the secondary phases, but it is noise due to the granular morphologies of CCTO sample.…”

Section: Physical Characterizationmentioning

confidence: 94%

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Tuning the optical and dielectric properties of calcium copper titanate Ca_xCu_3−xTi₄O₁₂ nanopowders

et al. 2015

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Section: Physical Characterizationmentioning

confidence: 94%

“…Moreover, structural defects such as distortions and/or strains in the CaTiO 3 lattice caused by the introduction of copper in these systems are able to induce the symmetry break of the [TiO 6 ] and [CaO], leading to an appearance of intermediary levels between the valence and conductions bands. 25,26,30…”

Section: Optical Propertiesmentioning

confidence: 99%

Tuning the optical and dielectric properties of calcium copper titanate Ca_xCu_3−xTi₄O₁₂ nanopowders

et al. 2015

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“…Usually, the high dielectric constant of CCTO accompanies a high dielectric loss [9][10][11]. By now, the high dielectric loss is the most serious problems preventing the use of CCTO in capacitor applications, many researchers devote to improve dielectric properties for applications.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ba2+ doping on microstructure and electric properties of calcium copper titanate (CaCu3Ti4O12) ceramics

Liu

Lai

et al. 2016

J Mater Sci: Mater Electron

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“…As known, the high dielectric constant of CCTO material depends on the crystal structure form. For example, the CCTO single crystal and ceramic exhibited the dielectric constant of 10 5 and 10 4 [4,31], respectively whereas the dielectric constant of CCTO film is 10 4 [1]. This high dielectric constant is stable in the frequency range of 10 4 -10 6 Hz and large temperature range of 100 -600 K [4,32].…”

Section: Chapter II Theoretical Backgroundmentioning

confidence: 99%

Gas Sensing Response of Nickel Doped Calcium Copper Titanate Thin Films Synthesized by Sol-Gel Method

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Nickel-doped calcium copper titanate (Ni-doped CCTO) thin films prepared by nickel oxide (NiO) and nickel (II) acetate (C4H6NiO4) have been synthesized using sol-gel method. Four layers of Ni-doped CCTO films with various nickel dopant concentrations including undoped film were deposited by a spin coating technique on silicon and alumina substrates. Each film layer was annealed at a fixed annealing temperature of 800 ?C. All samples were characterized by X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS) field emission scanning electron microscope (FESEM). Only the doped films prepared by NiO were analyzed by Raman spectroscopy. Moreover, the CCTO films were fabricated as gas sensors to measure gas sensing properties. XRD patterns showed that the main phase of undoped and Ni-doped CCTO were a cubic perovskite structure and there is only a small amount of impurity phase of rutile TiO2. The XPS signals confirmed that Ni2+ was found in Ni-doped CCTO films. Moreover, FESEM images presented the films thickness of approximately 400-600 nm for four-layered films on silicon and the surface of the films contained granular particles. In case of gas sensing property measurements, the obtained films were tested towards different types of gases (NO2, H2, NH3, H2S and ethanol). All films exhibited the best selectivity towards H2S compared to other gases. In addition, the sensor response of the films increases with increasing Ni-doping concentrations. The 7 wt% Ni-doped CCTO sensor prepared by NiO exhibited the highest sensor response of 112 under 10 ppm H2S at 250 ?C while the highest sensor response of 5 wt% Ni-doped CCTO sensor prepared by nickel (II) acetate was 175 at 300 ?C. In both cases, the sensor response of Ni-doped CCTO films is more than that of the undoped indicating that Ni-dopants in the films acting as a catalyst improve much better sensor responses.

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Structural, dielectric and optical properties of [(BZT–BCT)-(epoxy-CCTO)] composites

Cited by 14 publications

References 31 publications

Tuning the optical and dielectric properties of calcium copper titanate Ca_xCu_3−xTi₄O₁₂ nanopowders

Tuning the optical and dielectric properties of calcium copper titanate Ca_xCu_3−xTi₄O₁₂ nanopowders

Effect of Ba2+ doping on microstructure and electric properties of calcium copper titanate (CaCu3Ti4O12) ceramics

Gas Sensing Response of Nickel Doped Calcium Copper Titanate Thin Films Synthesized by Sol-Gel Method

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Structural, dielectric and optical properties of [(BZT–BCT)-(epoxy-CCTO)] composites

Cited by 14 publications

References 31 publications

Tuning the optical and dielectric properties of calcium copper titanate CaxCu3−xTi4O12 nanopowders

Tuning the optical and dielectric properties of calcium copper titanate CaxCu3−xTi4O12 nanopowders

Effect of Ba2+ doping on microstructure and electric properties of calcium copper titanate (CaCu3Ti4O12) ceramics

Gas Sensing Response of Nickel Doped Calcium Copper Titanate Thin Films Synthesized by Sol-Gel Method

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Tuning the optical and dielectric properties of calcium copper titanate Ca_xCu_3−xTi₄O₁₂ nanopowders

Tuning the optical and dielectric properties of calcium copper titanate Ca_xCu_3−xTi₄O₁₂ nanopowders