Pembuatan Magnet Berbasis Bafe12o19 – Sio2 Dan Karakterisasinya
PEMBUATAN MAGNET BERBASIS BaFe12O19 - SiO2 DAN
KARAKTERISASINYA
ABSTRAK
Pembuatan dan karakterisasi magnet telah berhasil dilakukan dengan
mencampurkan serbuk bahan magnet BaFe12O19 dan serbuk SiO2. Variasi
komposisi BaFe12O19 : SiO2 terdiri dari 100:0, 80:20, 70:30, 60:40 dan 50:50
dalam % berat. Pencampuran dilakukan dengan metode dry milling menggunakan
Planetary Ballmill (PBM) selama 48 jam. Serbuk hasil pencampuran dicetak
secara anisotropi pada tekanan 35 kgf/cm2sehingga menghasilkan pelet dengan
diameter 12 mm dan tebal 3-5 mm. Pelet tersebut kemudian dibakar (sinter) pada
suhu 600 °C, 650 °C, 700 °C, 750 °C, 800 °C dan ditahan pada masing-masing
suhu tersebut selama 2 jam sehingga diperoleh sampel uji. Karakterisasi sampel
uji meliputi analisa sifat fisis, struktur mikro dan pengukuran sifat magnet
(histerisis). Hasil identifikasi pola XRD menunjukkan bahwa fasa yang terbentuk
terdiri dari BaFe12O19, SiO2 dan Fe3O4. Morfologi permukaan yang diamati
dengan SEM menunjukkan bahwa ukuran butir < 1 μm. Berdasarkan hasil
pengukuran dengan permagraph, diketahui bahwa sifat magnetik yang terbaik
diperoleh pada komposisi 80:20 dengan suhu sintering 800 oC di mana nilai
koersifitas (Hc), remanensi (Br)dan energi produk maksimum (BHmaks) berturutturut 1,656 kOe, 0,81 kG dan 0,414 MGOe.
Kata kunci : sifat magnet, bariumheksaferit, aditif silika
MANUFACTURE OF BaFe12O19 - SiO2BASED MAGNETAND
CHARACTERIZATION
ABSTRACT
Preparation and characterization of magnetic have been successfully carried out
by mixing the magnetic material BaFe12O19 powder and SiO2 powder. The Ba
Fe12O19/SiO2 ratios used were 100:0, 80:20, 70:30, 60:40 and 50:50 by weight
percent. Mixing is done with a dry milling method using Planetary Ballmill
(PBM) for 48 hours. Powder blending results was printed on anisotropy pressure
35 kgf/cm2 to produce pellets with a diameter with of 20 mm and 5 mm
thickness.of 12 mm and 3-5 mm thickness. The pellets are then burned (sintered)
at a temperature of 600 °C, 650 °C, 700 °C, 750 °C, 800 °C and held at each of
these temperatures for 2 hours in order to obtain test samples. Characterization
of the test sample includes the analysis of physical properties, microstructure and
measurement of the magnetic properties (hysteresis). The XRD pattern
identification results showed that the phase is formed consisting of BaFe12O19,
SiO2 and Fe3O4. The surface morphology were measured by SEM showed that the
grain size ˂ 1 μm. Based on the results of measurements with permagraph, it is
known that the best magnetic properties are obtained on the composition of 80:20
with sintering temperature of 800 °C where the coercivity value (Hc), remanence
(Br) and maximum energy product (BHmaks) respectively 1.656 kOe, 0.81 kG and
0.414 MGOe.
Keywords : magnetic properties, barium heksaferit, silica additive
KARAKTERISASINYA
ABSTRAK
Pembuatan dan karakterisasi magnet telah berhasil dilakukan dengan
mencampurkan serbuk bahan magnet BaFe12O19 dan serbuk SiO2. Variasi
komposisi BaFe12O19 : SiO2 terdiri dari 100:0, 80:20, 70:30, 60:40 dan 50:50
dalam % berat. Pencampuran dilakukan dengan metode dry milling menggunakan
Planetary Ballmill (PBM) selama 48 jam. Serbuk hasil pencampuran dicetak
secara anisotropi pada tekanan 35 kgf/cm2sehingga menghasilkan pelet dengan
diameter 12 mm dan tebal 3-5 mm. Pelet tersebut kemudian dibakar (sinter) pada
suhu 600 °C, 650 °C, 700 °C, 750 °C, 800 °C dan ditahan pada masing-masing
suhu tersebut selama 2 jam sehingga diperoleh sampel uji. Karakterisasi sampel
uji meliputi analisa sifat fisis, struktur mikro dan pengukuran sifat magnet
(histerisis). Hasil identifikasi pola XRD menunjukkan bahwa fasa yang terbentuk
terdiri dari BaFe12O19, SiO2 dan Fe3O4. Morfologi permukaan yang diamati
dengan SEM menunjukkan bahwa ukuran butir < 1 μm. Berdasarkan hasil
pengukuran dengan permagraph, diketahui bahwa sifat magnetik yang terbaik
diperoleh pada komposisi 80:20 dengan suhu sintering 800 oC di mana nilai
koersifitas (Hc), remanensi (Br)dan energi produk maksimum (BHmaks) berturutturut 1,656 kOe, 0,81 kG dan 0,414 MGOe.
Kata kunci : sifat magnet, bariumheksaferit, aditif silika
MANUFACTURE OF BaFe12O19 - SiO2BASED MAGNETAND
CHARACTERIZATION
ABSTRACT
Preparation and characterization of magnetic have been successfully carried out
by mixing the magnetic material BaFe12O19 powder and SiO2 powder. The Ba
Fe12O19/SiO2 ratios used were 100:0, 80:20, 70:30, 60:40 and 50:50 by weight
percent. Mixing is done with a dry milling method using Planetary Ballmill
(PBM) for 48 hours. Powder blending results was printed on anisotropy pressure
35 kgf/cm2 to produce pellets with a diameter with of 20 mm and 5 mm
thickness.of 12 mm and 3-5 mm thickness. The pellets are then burned (sintered)
at a temperature of 600 °C, 650 °C, 700 °C, 750 °C, 800 °C and held at each of
these temperatures for 2 hours in order to obtain test samples. Characterization
of the test sample includes the analysis of physical properties, microstructure and
measurement of the magnetic properties (hysteresis). The XRD pattern
identification results showed that the phase is formed consisting of BaFe12O19,
SiO2 and Fe3O4. The surface morphology were measured by SEM showed that the
grain size ˂ 1 μm. Based on the results of measurements with permagraph, it is
known that the best magnetic properties are obtained on the composition of 80:20
with sintering temperature of 800 °C where the coercivity value (Hc), remanence
(Br) and maximum energy product (BHmaks) respectively 1.656 kOe, 0.81 kG and
0.414 MGOe.
Keywords : magnetic properties, barium heksaferit, silica additive