Effects of Mg contents on ZnAl 2O 4 thin films by sol gel method and its application

Huda Abdullah, Wan Nasarudin Wan Jalal, Mohd Syafiq Zulfakar, Badariah Bais, Sahbudin Shaari, Mohammad Tariqul Islam, Sarada Idris

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The need for miniaturization and weight reduction of GPS patch antennas have forced scientists to search for new microwave dielectric materials. A sol-gel method was used to prepare Zn (l.x)Mg xAl 2O 4 (x = 0.00, 0.05, 0.10, 0.20 & 0.30) thin films based microwave dielectric ceramics and GPS patch antenna. The structural, optical, chemical property and dielectric properties of (Mg/Zn)Al 2O4 - based microwave dielectric ceramics have been investigated. It is confirmed that ZnAl 2O 4 was succesfully formed with Mg by the X-ray diffraction (XRD) and Fourier Transform Infra-red (FTIR) patterns. The XRD patterns displayed the standard face-centered cubic of (Mg/Zn)Al 2O4. The addition of Mg decreased the crystallite size (19.2 to 12.9 nm) and lattice parameter (8.082 to 8.048 Å), whiles the apparent density increase linearly. The FTIR spectrum shows the bonding of (Mg/Zn)Al 2O 4 occurred at 666 cm -1. By using ultra-violet (UV-Vis) spectrophotometer, the band gap (E g) energy of undoped was observed slightly lower than the Mg-doped. The Atomic Force Microscopy (AFM) data shows the Root Mean Square (RMS) roughness decreased due to Mg increases. The material with a higher density is associated with high dielectric constant (ε r), which is suitable for GPS patch antenna application. The dielectric constant (ε r) of the films was characterized at certain frequency using LCR spectrometer. It also observed there is a steady decrease in ε r with applied frequency for each sample. The GPS patch antenna was fabricate using the Zn (1-x)Mg xAl 2O 4. Finally, the measured magnitude of return loss at 1.5754 GHz meets the requirements of GPS application.

Original languageEnglish
Title of host publicationCeramic Engineering and Science Proceedings
PublisherAmerican Ceramic Society
Pages185-195
Number of pages11
Volume35
Edition6
Publication statusPublished - 2014
EventAdvanced Processing and Manufacturing Technologies for Nanostructured and Multifunctional Materials - 38th International Conference on Advanced Ceramics and Composites, ICACC 2014 - Daytona Beach, United States
Duration: 26 Jan 201431 Jan 2014

Other

OtherAdvanced Processing and Manufacturing Technologies for Nanostructured and Multifunctional Materials - 38th International Conference on Advanced Ceramics and Composites, ICACC 2014
CountryUnited States
CityDaytona Beach
Period26/1/1431/1/14

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Sol-gel process
Global positioning system
Microstrip antennas
Thin films
Ultraviolet spectrophotometers
Microwaves
Fourier transforms
Permittivity
Infrared radiation
X ray diffraction
Crystallite size
Dielectric properties
Chemical properties
Diffraction patterns
Lattice constants
Spectrometers
Atomic force microscopy
Energy gap
Surface roughness

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

Cite this

Abdullah, H., Jalal, W. N. W., Zulfakar, M. S., Bais, B., Shaari, S., Islam, M. T., & Idris, S. (2014). Effects of Mg contents on ZnAl 2O 4 thin films by sol gel method and its application In Ceramic Engineering and Science Proceedings (6 ed., Vol. 35, pp. 185-195). American Ceramic Society.

Effects of Mg contents on ZnAl 2O 4 thin films by sol gel method and its application . / Abdullah, Huda; Jalal, Wan Nasarudin Wan; Zulfakar, Mohd Syafiq; Bais, Badariah; Shaari, Sahbudin; Islam, Mohammad Tariqul; Idris, Sarada.

Ceramic Engineering and Science Proceedings. Vol. 35 6. ed. American Ceramic Society, 2014. p. 185-195.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abdullah, H, Jalal, WNW, Zulfakar, MS, Bais, B, Shaari, S, Islam, MT & Idris, S 2014, Effects of Mg contents on ZnAl 2O 4 thin films by sol gel method and its application in Ceramic Engineering and Science Proceedings. 6 edn, vol. 35, American Ceramic Society, pp. 185-195, Advanced Processing and Manufacturing Technologies for Nanostructured and Multifunctional Materials - 38th International Conference on Advanced Ceramics and Composites, ICACC 2014, Daytona Beach, United States, 26/1/14.
Abdullah H, Jalal WNW, Zulfakar MS, Bais B, Shaari S, Islam MT et al. Effects of Mg contents on ZnAl 2O 4 thin films by sol gel method and its application In Ceramic Engineering and Science Proceedings. 6 ed. Vol. 35. American Ceramic Society. 2014. p. 185-195
Abdullah, Huda ; Jalal, Wan Nasarudin Wan ; Zulfakar, Mohd Syafiq ; Bais, Badariah ; Shaari, Sahbudin ; Islam, Mohammad Tariqul ; Idris, Sarada. / Effects of Mg contents on ZnAl 2O 4 thin films by sol gel method and its application Ceramic Engineering and Science Proceedings. Vol. 35 6. ed. American Ceramic Society, 2014. pp. 185-195
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AU - Shaari, Sahbudin

AU - Islam, Mohammad Tariqul

AU - Idris, Sarada

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