Yusmaniar, Maulidya, Wisnu Ari, Harini Sosiati, Erfan Handoko
This study aims for synthesized UPR/Core-Shell Fe 3 O 4 @SiO 2 composites as microwave absorption materials. In this research nanoparticle, Fe 3 O 4 was synthesized by using coprecipitation methods from the iron sand with NaOH solution. Core- Shell Fe 3 O 4 @SiO 2 was synthesized by using StÖber methods by using Tetraethylorthosilicate (TEOS) as precursor substances, where nanoparticle Fe 3 O 4 as core and SiO 2 the shell. The addition of TEOS was adding in the variation of volume and SEM study indicated that with an increase in TEOS content the particle of core-shell Fe 3 O 4 @SiO 2 become bigger. Composites were synthesized with core-shell Fe 3 O 4 @SiO 2 as the filler and UPR as the matrix. Then, composites were tested for electromagnetic microwave absorption using VNA (Vector Network Analyzer) at 8-12 GHz frequency. The result proved that UPR/Core-Shell Fe 3 O 4 @SiO 2 composites were able to absorb electromagnetic waves at 9 GHz frequency with absorption large range up to - 15,8 dB. © 2019 Author(s).
Departement of Chemistry, Faculty of Match and Science, Universitas Negeri Jakarta, Kampus A Rawamangun, Muka Jakarta Timur, 13220, Indonesia; Centre for Science and Technology of Advanced Materials, National Nuclear Energy Agency, Kawasan Puspitek Serpong, Tangerang Selatan, Banten, Indonesia; Department of Mechanical Engineering, Faculty of Engineering, Universitas Muhammadiyah Yogyakarta, Tamantirto, Kasihan Bantul Yogyakarta, Indonesia; Dept of Physics, Universitas Negeri Jakarta, Jalan Rawamangun Muka, Jakarta, 13220, Indonesia
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