Synthesis and investigation of dielectric properties of nanoceramic composite material for microwave applications

Micro & nano letters

article

Srilali Siragam¹  Raghvendra S. Dubey²  Lakshman Pappula³ 

[1] Department of ECE, Swarnandhra College of Engineering and Technology;Advanced Research Laboratory for Nanomaterials & Devices, Department of Nanotechnology, Swarnandhra College of Engineering & Technology;Department of ECE, KL University

关键词: scanning electron microscopy;    sol-gel processing;    X-ray diffraction;    X-ray chemical analysis;    nanoparticles;    nanofabrication;    Raman spectra;    titanium compounds;    ceramics;    zinc compounds;    permittivity;    field emission scanning electron microscopy;    aluminium compounds;    semiconductor growth;    II-VI semiconductors;    crystal structure;    nanoceramic composite material;    microwave applications;    sol–gel route;    XRD pattern;    structural parameters;    field-emission scanning electron microscopy;    energy-dispersive spectroscopy analysis;    dielectric permittivity;    dielectric ceramic material;    nanoparticles;    LCR measurement;    charge carriers;    Raman spectra;    ZnO;    ZnAl2O4TiO2;    TiO2;   

DOI  :  10.1049/mnl.2020.0266

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

This Letter reports the synthesis of nanoceramic composite ZnAl 2 O 4 TiO 2 by using a cost-effective and straight forward sol–gel route. X-ray diffraction (XRD) showed the ZnAl 2 O 4 cubic structure along with the mixed anatase- and rutile-phases of TiO 2 . Rietveld refinement is performed using XRD pattern to study the structural parameters. Raman investigation endorsed the corresponding vibration peaks of TiO 2 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.

【 授权许可】

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