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EFFECT OF Mn-Ti IONS DOPING AND SINTERING TEMPERATURE ON PROPERTIES OF BARIUM HEXAFERRITE
Achmad Maulana Soehada
(1), Kerista Sebayang
(2), Toto Sudiro
(3), Candra Kurniawan
(4), Perdamean Sebayang
(5),
(1) Faculty of Mathematic and Natural Science - North Sumatera University
Jalan Bioteknologi No.1 Kampus USU, Medan, 20155
(2) Faculty of Mathematic and Natural Science - North Sumatera University
Jalan Bioteknologi No.1 Kampus USU, Medan, 20155
(3) Research Center for Physics - Indonesian Institute of Science
Kompleks Puspiptek Serpong, Tangerang Selatan, 15314
(4) Research Center for Physics - Indonesian Institute of Science
Kompleks Puspiptek Serpong, Tangerang Selatan, 15314
(5) Research Center for Physics - Indonesian Institute of Science
Kompleks Puspiptek Serpong, Tangerang Selatan, 15314
Corresponding Author
Abstract
EFFECT OF Mn-Ti IONS DOPING AND SINTERING TEMPERATURE ON PROPERTIES OF BARIUM HEXAFERRITE. Mn-Ti doped (0, 0.1, 0.4, 0.5, and 0.6 mole%-barium hexaferrite powders have been prepared from BaCO3, Fe2O3, TiO2 andMnO powder by mechanical alloying technique for 20 hours. The mixture powder were grinded and then dried at 100 °C for 24 hours, followed by calcined at 1,000 °C for 2 hours. The calcined powder was then crushed into 400 mesh (38 μm) in particle size. X-Ray Diffraction analysis was performed to determine the phase formed. The powder was mixed with 3 wt%Celuna WE -518 polymer, and compressed with applied force of 5 tons. The sintering process was done at temperatures of 1100 °C and 1150 °C for 2 hours. The microstructure of sintered samples was observed by Scanning Electron Microscope - Energy Dispersive X-Ray Spectroscopy (SEM-EDS). The magnetic properties and Reflection Loss (RL) was measured by permeagraph Magnet-Physik and Vector Network Analyzer (VNA), respectively. The results show that the remanance (Br) of samples are likely to decrease with increase in %mol of Mn-Ti and the optimum coercivity (HCJ) 4,42 kOe was achieved at 0,5 mole% Mn-Ti. The maximum reflection loss of -25,6 dB was obtained at 0,4mole%Mn-Ti with sintering temperature of 1100 °C for 2 hours. Accordingly, it can be potentially used for microwave absorption application.
Keywords
Barium hexaferrite, Ion Mn-Ti, Reflection loss, Flux density, B-H curve
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DOI:
10.17146/jsmi.2014.15.4.4337