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Microstructure and magnetic properties of barium hexaferrite produced by sol gel auto combustion for radar absorber material (RAM) application

Widyastuti, Widyastuti and Kharismawati, Endah and Zainuri, Mochamad and Ardhyananta, Hosta (2013) Microstructure and magnetic properties of barium hexaferrite produced by sol gel auto combustion for radar absorber material (RAM) application. In: 1st International Conference on Mechanical Engineering (iCOME 2013) , 12-14 September 2013, Lombok, Indonesia .

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Abstract

Barium hexaferrite (BaFe12O19) with hexagonal structure had been known as the high performance magnetic for Radar Absorber Material (RAM). Barium hexaferrite (BaM) was synthesized by sol gel auto combustion to get a homogeneous nanoparticle of BaM. It was obtained from solution mixture between barium nitrate and ferri nitrate nonahidrat with precipitation of ion barium (Ba2 +) and ferri (Fe3 +) by solution of sodium hydroxide. Samples were prepared with mol ratio of Fe / Ba 11, added ammoniac in order to get pH varies in 7.5; 9, and 11. Combustion process is induced by adding citric acid. The stirring time were performed in 1, 2, and 3 hours, respectively. The effect of pH, stirring time, microstructure, phase, and magnetic properties were investigated using X-ray diffraction (XRD), Scanning Electron Microscope (SEM) and a vibrating sample magnetometer (VSM). The results showed that the highest coercivity was 0.6 Tesla and the smallest crystal size 414.409 nm was obtained for pH 7.5 and stirring time in 2 hours. Moreover, the largest magnetic saturation 55.54 emu/g was reached for pH 7.5 with stirring time within 1 hour.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: barium hexaferrite; sol gel; pH
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA401-492 Materials of engineering and construction. Mechanics of materials
Depositing User: Normajihan Abd. Rahman
Date Deposited: 18 Oct 2013 02:43
Last Modified: 21 Jan 2015 07:34
URI: http://eprints.uthm.edu.my/id/eprint/4360
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