Sintesis dan Karakterisasi XRD Multiferroik BiFeO3 Didoping Pb

Abstract

Sintesis multiferoik BiFeO₃ didoping Pb telah dilakukan dengan metode Pencampuran basah (liquid mixing), menggunakan Fe murni dan Fe₂O₃ hasil sintesis dari pasir besi. Dalam penelitian ini digunakan variasi konsentrasi doping Pb x=0,25; x=0,5; variasi suhu kalsinasi dan variasi holding time. Sample dikarakterisasi dengan XRD (X-ray Difraction) dan magnetic susceptibility balance. Sampel variasi konsentrasi doping Pb x=0,25 ditemukan fasa pengotor BFO sekunder sedangkan sampel x=0,5 ditemukan fasa pengotor BFO sekunder dan fasa bahan penyusun. Dekomposisi fasa BiFeO₃ menjadi fasa sekunder BFO meningkat dengan meningkatnya suhu kalsinasi dan holding time. Doping Pb memperbesar kemungkinan terbentuknya fasa BiFeO₃. Konsentrasi doping Pb x=0,5 dapat meningkatkan prosentase fraksi volume BiFeO₃sebesar ~7% dan dapat menurunkan prosentase fraksi volume fasa BFO sekunder sebesar ~15%, namun dekomposisi fasa menjadi fasa bahan penyusun meningkat ~43%. Ukuran kristal BiFeO₃ sebesar ~29 nm sampai ~112 nm. Sampel memiliki nilai χ berkisar 1,69x10^-7.

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