Preparation of NiAl2O4-Based Flexible Substrates for Metamaterials with Negative Dielectric Properties

Md Atiqur Rahman, Eistiak Ahamed, Mohammad Rashed Iqbal Faruque, Mohammad Tariqul Islam

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Various techniques are commonly used to produce nano-crystalline NiAl2O4 materials; however, their practical applications in the microwave region remain very limited. In this work, flexible substrates for metamaterials containing two different concentrations of NiAl2O4 (labelled Ni36 and Ni42) have been synthesised using a sol-gel method. The formation of spinel structures in the synthesised materials is confirmed, and their crystalline sizes are determined using scanning electron microscopy, X-ray diffraction, and energy dispersive X-ray techniques. The dielectric properties, conductivities, loss tangents, and other parameters of the NiAl2O4-based substrates are analysed to evaluate their applicability as dielectric materials for the microwave frequency range. The obtained results show that the fabricated Ni36 and Ni42 nickel aluminates possess dielectric constants of 4.94 and 4.97 and loss tangents of 0.01 and 0.007, respectively; in addition, they exhibit high flexibility and light weight, which make them suitable for applications as metamaterial substrates. The synthesised structures are also validated experimentally using a commercially available electromagnetic simulator; as a result, double negative behaviour of the flexible metamaterials has been observed. Furthermore, it is found that the prepared NiAl2O4 substrates can be used in the S-, C-, and X-bands of the microwave frequency region.

Original languageEnglish
Article number14948
JournalScientific Reports
Volume8
Issue number1
DOIs
Publication statusPublished - 1 Dec 2018

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Microwaves
Electromagnetic Phenomena
Polymethyl Methacrylate
Nickel
X-Ray Diffraction
Electron Scanning Microscopy
Gels
X-Rays
Weights and Measures

ASJC Scopus subject areas

  • General

Cite this

Preparation of NiAl2O4-Based Flexible Substrates for Metamaterials with Negative Dielectric Properties. / Rahman, Md Atiqur; Ahamed, Eistiak; Faruque, Mohammad Rashed Iqbal; Islam, Mohammad Tariqul.

In: Scientific Reports, Vol. 8, No. 1, 14948, 01.12.2018.

Research output: Contribution to journalArticle

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