Articles
  • Production and microwave electromagnetic shielding effectiveness of polyaniline-La2Ti2O7:Er,Yb composites

  • Ethem İlhan Şahina,d,*, Selim Burak Cantürkb, Mehriban Emekc, Seval Gençb and Mesut Kartale

  • aDepartment of Satellite Communications and Remote Sensing, İstanbul Technical University, Maslak, Istanbul 34469, Turkey
    bDepartment of Metallurgical and Materials Engineering, Marmara University, Goztepe, Istanbul 34722, Turkey
    cDepartment of Physics, Golbasi Vocational School, Adiyaman University, Gölbaşi ,Adıyaman 02040, Turkey
    dAdvanced Technology Research and Application Center, Adana Alparslan Türkeş Science and Technology University, Adana 01250, Turkey
    eDepartment of Electronics and Communication Engineering, İstanbul Technical University, Maslak, Istanbul 34469, Turkey

  • This article is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In this research, La2Ti2O7 doped with erbium-ytterbium was produced by using solid state technique. A series of compounds with the chemical equation (La1−x−yREx−y)2Ti2O7 were doped with (Er3+, x = 0.025, 0.050 ) and (Yb3+ y = 0.02 ) rare earth ions prepared by conventional solid state reaction method at 1350 oC for 24 h. X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) were carried out for the structural analysis, which showed that second phase did not form in (La1−x−yREx−y)2Ti2O7. Additionally, the polyaniline- erbium, ytterbium doped La2Ti2O7 composites were fabricated via hot pressing using the compositions of (La0.955Yb0.02Er0.025)2Ti2O7, (La0.93Yb0.02Er0.05)2Ti2O7 and aniline. The weight ratios of erbium-ytterbium doped lanthanum titanate and aniline were 1:1 and 1:3 respectively, and epoxy resin was utilized to develop microwave shielding effectiveness composites. The microwave shielding effectiveness performances of polyaniline- La2Ti2O7: erbium-ytterbium composites were examined by shielding effect in 0-8 GHz using two-port vector network analyzer. A minimum of - 34.37 dB shielding effect performance was obtained in 6.27 GHz at the thickness of 2.0 mm. This shielding effect performance can be adjusted easily by managing the content of polyaniline in the composites for the needed frequency bands


Keywords: Shielding effect, La2Ti2O7, Polyaniline, Polymer-matrix composite

This Article

  • 2021; 22(2): 208-213

    Published on Apr 30, 2021

  • 10.36410/jcpr.2021.22.2.208
  • Received on Sep 7, 2020
  • Revised on Dec 6, 2020
  • Accepted on Dec 29, 2020

Correspondence to

  • Ethem İlhan Şahin

  • aDepartment of Satellite Communications and Remote Sensing, İstanbul Technical University, Maslak, Istanbul 34469, Turkey
    dAdvanced Technology Research and Application Center, Adana Alparslan Türkeş Science and Technology University, Adana 01250, Turkey
    Tel : +90 322 455 00 00 Fax: +90 322 455 00 02

  • E-mail: shnethem@gmail.com