PENGARUH ADITIF FERRO BORON (FeB) TERHADAP KARAKTERISTIK SERBUK HEMATIT (α-Fe2O3)

Suci Pangestuti, 1317041045 (2017) PENGARUH ADITIF FERRO BORON (FeB) TERHADAP KARAKTERISTIK SERBUK HEMATIT (α-Fe2O3). FAKULTAS MATEMATIKA DAN ILMU PENGETAHUAN ALAM, UNIVERSITAS LAMPUNG.

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Abstrak

ABSTRAK Telah dilakukan penelitian mengenai pengaruh aditif Ferro Boron (FeB) terhadap karakteristik serbuk hematit (α-Fe2O3). Proses preparasi sampel dilakukan dengan mencampurkan α-Fe2O3 dan FeB menggunakan metode milling kering dengan alat Planetary Ball Mill (PBM). Variasi komposisi aditif FeB adalah 4 dan 8 wt.% dengan suhu kalsinasi 900, 1000 dan 1100 oC. Karakterisasi sampel melalui uji Particle Size Analyzer (PSA), true density, X-Ray Diffraction (XRD) dan Vibrating Sample Magnetometer (VSM). Dari hasil eksperimen ditunjukkan terjadi peningkatan ukuran partikel yang berkaitan dengan penurunan true density pada sampel 8 wt.% dengan nilai sebesar 2,80 μm dan 2,47 g/cm3. Karakterisasi XRD menunjukkan pada sampel 8 wt.% dan suhu kalsinasi 1000 oC dan 1100 oC terbentuk fasa iron boride (Fe2B). Sedangkan pada sampel tanpa aditif terbentuk fasa maghemit (γ-Fe2O3) dan magnetit (Fe3O4) setelah proses kalsinasi. Karakterisasi VSM menunjukkan bahwa proses kalsinasi mengakibatkan sifat magnet semakin besar dan penambahan FeB cenderung menurunkan sifat magnet pada sampel sebelum dan setelah kalsinasi. Kata Kunci : Hematit (α-Fe2O3), ferro boron, mechanical alloying dan kalsinasi ABSTRACT The study about effect of ferro boron (FeB) additive towards characteristic of hematite (α-Fe2O3) powder has been done. The powders of FeB and α-Fe2O3 was milled with dry milling method using Planetary Ball Mill (PBM) for 12 hours. Variation of FeB compositions are 4 and 8 wt.%. The milled powder was calcined at temperatures of 900, 1000 and 1100 oC. The characterization of the powders was performed by Particle Size Analyzer (PSA), true density, X-Ray Diffraction (XRD) and Vibrating Sample Magnetometer (VSM). The results effect of additives FeB showed an increasing of particle size which related to decrease of true density of sample 8 wt.% composition with a value 2.80 μm and 2.47 g / cm3. Respectively the XRD characterization of sample with 8 wt.% composition with the calcination temperature of 1000 and 1100 °C showed that iron boride Fe2B) phase was formed. Maghemite (γ-Fe2O3) and magnetite (Fe3O4) was formed during calcination for non-additive sample. The VSM characterization showing the effect of the calcination temperature are increasing the magnetic properties and the addition of FeB tends to lower the magnetic properties within samples before and after calcined. Key word: Hematite (α-Fe2O3), ferro boron, mechanical alloying and calcination

Tipe Karya Ilmiah: Skripsi
Subyek: Q Science (General) > Q Science (General)
Program Studi: Fakultas MIPA > Prodi Fisika
Depositing User: 70342302 . Digilib
Date Deposited: 04 Aug 2017 06:24
Last Modified: 04 Aug 2017 06:24
URI: http://digilib.unila.ac.id/id/eprint/27724

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