Investigation on Dielectric Constant of Zinc Oxide

Omar, Khalid; Ooi, Mahayatun Dayana Johan; Hassin, M. M.

doi:10.5539/mas.v3n2p110

Cited by 32 publications

(18 citation statements)

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“…where ε r is the dielectric constant, C is the equivalent parallel capacitance obtained from the data of measurement, d is the thickness of the fabricated ceramic material, A is the combined surface electrode area of the electrode discs, and ε 0 is the permittivity of vacuum (8.85 × 10 −12 F/m). e dielectric loss obtained from the value of the dissipation factor can be calculated from by the following equation [20]:…”

Section: Dielectric Propertiesmentioning

confidence: 99%

Calcium Titanate from Food Waste: Combustion Synthesis, Sintering, Characterization, and Properties

Cherdchom

Rattanaphan

Chanadee

2019

Advances in Materials Science and Engineering

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Calcium titanate (CaTiO 3 ) was combustion synthesized from a calcium source of waste duck eggshell, anatase titanium dioxide (A-TiO 2 ), and magnesium (Mg). e eggshell and A-TiO 2 were milled for 30 min in either a high-energy planetary mill or a conventional ball mill. ese powders were then separately mixed with Mg in a ball mill. After synthesis, the combustion products were leached and then sintered to produce CaTiO 3 ceramic. Analytical characterization of the as-leached combustion products revealed that the product of the combustion synthesis of duck eggshell + A-TiO 2 that had been high-energy-milled for 30 min before synthesis comprised a single perovskite phase of CaTiO 3 . e high-energy milling of the reactant powder had generated a large reactive surface area and induced structural defects, both of which drove the completion of the combustion reaction and the phase conversion of the reactants into the product. A calcium titanate ceramic, fabricated by sintering as-leached powdered combustion product at 1350°C for 180 min, achieved a maximum density of 3.65 g/cm 3 and a minimum porosity of 0.54%. e same fabricated calcium titanate ceramic product also exhibited the highest dielectric constant (∼78) and the lowest dielectric loss (∼0.02), which resulted from the simplified charge polarization process.

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Section: Dielectric Propertiesmentioning

confidence: 99%

Calcium Titanate from Food Waste: Combustion Synthesis, Sintering, Characterization, and Properties

Cherdchom

Rattanaphan

Chanadee

2019

Advances in Materials Science and Engineering

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“…At room temperature the pure PDMS is a good electrical isolator [5].To become electrically conducting PDMS should be doped, for example, with conducting nanofillers [6]. Among other nanofillers (like carbon nanotubes, carbon black and others) which are often used for polymer composite preparation, ZnO nanoparticles and nanorods are very interesting due their unique semiconducting, photoconducting and piezoelectric properties [7,8]. Although the electrical and mechanical properties of ZnO nanomaterials have been extensively investigated, the investigations of dielectric properties of PDMS composites filled with ZnO nanoparticles are rather rare in the literature [5,9,10].…”

Section: Introductionmentioning

confidence: 99%

Dielectric Spectroscopy of Polymer Based PDMS Nanocomposites with ZnO Nanoparticles

et al. 2015

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Dielectric spectroscopy results of organic polymer Polydimethylsiloxane (PDMS) with different ZnO nanoparticle concentrations are presented in wide temperature range. Dielectric loss was measured as a function of electromagnetic field frequency at various temperatures. Our measurements have shown that the value and position of dielectric loss peak on a temperature scale depends on the concentration of ZnO nanoparticles within PDMS. The temperature behaviour of dielectric losses was compared with temperature dependencies of ultrasonic attenuation in the samples. It is shown that the maximum of dielectric losses in PDMS nanocomposite is described according to the Vogel-Fulcher law and the glass transition increases with ZnO concentration.

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“…The wavelength dependence of the dielectric function of the ZnO is obtained by fitting the data given in [21] and is given by the following empirical relation…”

Section: Zinc Oxide Layermentioning

confidence: 99%

Performance Analysis of Bimetallic Layer With Zinc Oxide for SPR-Based Fiber Optic Sensor

Tabassum

Gupta

2015

J. Lightwave Technol.

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We present an efficient fiber optic SPR sensor consisting of bimetallic layers of silver (Ag) and gold (Au) in coordination with zinc oxide (ZnO) for refractive-index sensing in spectral mode. The performance of the sensor is explored in terms of electric field intensity, sensitivity, and the figure of merit theoretically as well as experimentally. Four kinds of sensors with layers of Ag/ZnO, Au/ZnO, Au/Ag/ZnO, and Ag/Au/ZnO over an unclad core of the fiber are studied. For simulation, two-dimensional multilayer matrix method along with geometrical optics is used. It is found that the sensor having layers of Ag/Au/ZnO with optimized thicknesses possesses maximum electric field intensity at the interface, large shift in the resonance wavelength, sharp SPR dip, and high value of the figure of merit. In addition, the additional layers of Au and ZnO can also be used for the tuning of resonance wavelength in the visible region of the electromagnetic spectrum and for the protection of Ag layer from oxidation and; hence, can improve the durability of the sensor. Further, ZnO layer can also be used to sense some of the gases.Index Terms-Bimetallic layer, figure of merit, optical fiber sensor, refractive index, sensitivity, surface plasmon resonance.

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Investigation on Dielectric Constant of Zinc Oxide

Abstract: The studies of the behavior of zinc oxide and its dielectric constant at different temperature ranging from 700

Cited by 32 publications

References 0 publications

Calcium Titanate from Food Waste: Combustion Synthesis, Sintering, Characterization, and Properties

Calcium Titanate from Food Waste: Combustion Synthesis, Sintering, Characterization, and Properties

Dielectric Spectroscopy of Polymer Based PDMS Nanocomposites with ZnO Nanoparticles

Performance Analysis of Bimetallic Layer With Zinc Oxide for SPR-Based Fiber Optic Sensor

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