Synthesis and investigation of dielectric properties of nanoceramic composite material for microwave applications
- Author(s): Srilali Siragam 1 ; Raghvendra S. Dubey 2 ; Lakshman Pappula 3
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View affiliations
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Affiliations:
1:
Department of ECE , Swarnandhra College of Engineering and Technology , Narsapur, Andhra Pradesh 534275 , India ;
2: Advanced Research Laboratory for Nanomaterials & Devices, Department of Nanotechnology , Swarnandhra College of Engineering & Technology , Seetharampuram, West Godavari, Narsapur 534 280, Andhra Pradesh , India ;
3: Department of ECE , KL University , Greenfields, Vaddeswaram, Guntur, Andhra Pradesh , India
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Affiliations:
1:
Department of ECE , Swarnandhra College of Engineering and Technology , Narsapur, Andhra Pradesh 534275 , India ;
- Source:
Volume 15, Issue 15,
30
December
2020,
p.
1156 – 1161
DOI: 10.1049/mnl.2020.0266 , Online ISSN 1750-0443
This Letter reports the synthesis of nanoceramic composite ZnAl2O4TiO2 by using a cost-effective and straight forward sol–gel route. X-ray diffraction (XRD) showed the ZnAl2O4 cubic structure along with the mixed anatase- and rutile-phases of TiO2. Rietveld refinement is performed using XRD pattern to study the structural parameters. Raman investigation endorsed the corresponding vibration peaks of TiO2 and ZnO. Field-emission scanning electron microscopy evidenced the agglomerated spherical nanoparticles. Energy-dispersive spectroscopy analysis demonstrated the elementary peaks of Zn, Al, and Ti at 4.5, 1.5, and 1 eV, respectively. LCR measurement revealed the decreased dielectric permittivity with the rise in frequency and temperature. This dielectric characteristic is attributed to the dipole movement of the charge carriers. Furthermore, the authors present the investigation of the conductivity and impedance of the prepared dielectric ceramic material.
Inspec keywords: sol-gel processing; titanium compounds; crystal structure; permittivity; scanning electron microscopy; zinc compounds; aluminium compounds; nanoparticles; nanofabrication; Raman spectra; X-ray diffraction; X-ray chemical analysis; II-VI semiconductors; semiconductor growth; field emission scanning electron microscopy; ceramics
Other keywords: field-emission scanning electron microscopy; ZnO; microwave applications; XRD pattern; TiO2; dielectric ceramic material; energy-dispersive spectroscopy analysis; LCR measurement; Raman spectra; charge carriers; nanoparticles; structural parameters; sol–gel route; ZnAl2O4TiO2; dielectric permittivity; nanoceramic composite material
Subjects: Optical properties of composite materials (thin films, low-dimensional and nanoscale structures); Infrared and Raman spectra in composite materials; Dielectric permittivity; Nanometre-scale semiconductor fabrication technology; Structure of solid clusters, nanoparticles, nanotubes and nanostructured materials; Electromagnetic radiation spectrometry (chemical analysis); Oxide and ferrite semiconductors; Microstructure; Charge carriers: generation, recombination, lifetime, and trapping (semiconductors/insulators); Deposition from liquid phases; Crystal structure of specific inorganic compounds; Preparation of ceramics and refractories; Other methods of nanofabrication; Deposition from liquid phases (melts and solutions); Ceramics and refractories (engineering materials science); II-VI and III-V semiconductors; Electrical properties of composite materials (thin films, low-dimensional and nanoscale structures)
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