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Journal of Sol-Gel Science and Technology

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01-09-2014 | Original Paper

Study of (1−x)ZnAl₂O₄–xSiO₂ spinel structures as microwave dielectric materials

Authors: Mohd Syafiq Zulfakar, Huda Abdullah, Wan Nasarudin Wan Jalal, Zalita Zainuddin, Sarada Idris

Published in: Journal of Sol-Gel Science and Technology | Issue 3/2014

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Abstract

Sol–gel method was used to synthesize zinc aluminate (ZnAl₂O₄) dispersed into silica matrix with different compositions of x. Morphological structure of (1−x)ZnAl₂O₄–xSiO₂ samples were investigated by field emission scanning electron microscope (FESEM) and X-ray diffractometer (XRD). The FESEM images showed spherical structures and agglomerated particles occurred inside the samples. XRD analysis indicated the cubic phase formation of the samples. The crystallite size, D was calculated and it was found that the crystallite size are slightly increased from 8 to 17 nm. FTIR spectra analysis shows that the water presence in the samples and also the presence of nitrate group. The dielectric properties have been measured, ε _r value was found to be around 13.0. The S₁₁ parameter analysis shows the samples was resonated at 2.40 GHz and gives different values of bandwidth for microstrip patch antenna application.

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Title: Study of (1−x)ZnAl2O4–xSiO2 spinel structures as microwave dielectric materials
Authors: Mohd Syafiq Zulfakar
Huda Abdullah
Wan Nasarudin Wan Jalal
Zalita Zainuddin
Sarada Idris
Publication date: 01-09-2014
Publisher: Springer US
Published in: Journal of Sol-Gel Science and Technology / Issue 3/2014
Print ISSN: 0928-0707
Electronic ISSN: 1573-4846
DOI: https://doi.org/10.1007/s10971-014-3392-7

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