Sintesis Komposit Berbasis Fe2O3/Fe3O4-Carbon dots sebagai Penyerap Gelombang Mikro.

Abstract

Material RAM telah banyak diteliti sebelumnya, carbon dots dan dicampurkan dengan material bersifat magnetik yaitu Fe2O3/Fe3O4, ketiga material berperan sebagai filer dan parafin sebagai matriks. Fe2O3/Fe3O4 telah berhasil disintesis menggunakan metode hidrotermal sedangkan Carbon dots disintesis menggunakanmetode iradiasi gelombang mikro (microwave) dan paduan Parafin/ Fe2O3/Fe3O4-Carbon dots disintesis dengan cara pencampuran langsung sehingga menjadi plat dengan variasi 50:0:50, 50:5:45, 50:25:25, 50:40:10, dan 50:50:0 (b/b/b gr). Hasil karakterisasi XRD carbon dots menunjukkan bahwa puncak- puncak difraksi sesuai dengan bidang kristal Carbon dots, begitupun dengan hasil karakterisasi menunjukan puncak-puncak kristal Fe2O3/Fe3O4. Dari hasil karakterisasi SEM Fe2O3/Fe3O4 membentuk gumpalan. Sedangkan, komposit Parafin/Fe2O3/Fe3O4-Carbon dots dilakukan karakterisasi VNA. Dari hasil uji VNA menunjukkan bahwa reflection loss paling besar pada komposisi 50:0:50 yaitu -28.8 dB. Kata kunci: Carbon dots, Fe2O3, Fe3O4, material penyerap radar, parafin.

RAM material has been widely studied before, carbon dots and mixed with magnetic materials, namely Fe2O3/Fe3O4, the three materials act as a filler and paraffin as a matrix. Fe2O3/Fe3O4 has been successfully synthesized using the hydrothermal method while Carbon dots are synthesized using the microwave irradiation method and the Paraffin/ Fe2O3/Fe3O4-Carbon dots alloy is synthesized by direct mixing to become a plate with variations of 50:0:50, 50:5:45, 50:25:25, 50:40:10, and 50:50:0 (w/w/w gr). The results of the XRD characterization of Carbon dots show that the diffraction peaks correspond to the crystal plane of Carbon dots, as well as the characterization results showing the peaks of Fe2O3/Fe3O4 crystals. From the results of the SEM characterization of Fe2O3/Fe3O4 forms lumps. Meanwhile, the Paraffin/ Fe2O3/Fe3O4-Carbon dots composite was subjected to VNA characterization. The VNA test results showed that the largest reflection loss was in the 50:0:50 composition, which was -28.8 dB.

Keywords: Carbon dots, Fe2O3, Fe3O4, radar absorbing material, paraffin.