Sintesis dan Karakterisasi Serbuk BaFe12O19 dengan Penambahan FeMo Melalui Metode Mechanical Alloying
Sintesis dan Karakterisasi Serbuk BaFe12O19 dengan Aditif FeMo
Melalui Metode Mechanical Alloying
ABSTRAK
Telah dilakukan sintesis serbuk BaFe12O19 dengan penambahan aditif FeMo (1, 3,
5, 7, dan 9%wt) melalui metode mechanical alloying dan variasi temperatur
kalsinasi 1000, 1100, dan 1200 oC (2 jam). Karakterisasi yang dilakukan pada
serbuk meliputi: true density, Optical Microscope (OM), Vibrating Sample
Magnetometer (VSM), dan X-Ray Diffraction (XRD). Hasil karakterisasi true
density sebelum kalsinasi menghasilkan nilai berkisar 3,22 - 4,61 x 10
-3
kg/ m3
dan hasil karakterisasi Optical Microscope (OM) menghasilkan nilai 106 – 92 nm.
Hasil analisis VSM dengan penambahan 5%berat FeMo adalah σs = 50,49 (4π x
10-7) Wb.m/kg; σr = 23,83 (4π x 10-7) Wb.m/kg; jHc = 1106 (103/4π) A/m; dan
BHmax = 137 (10-1/4π) J/m3 dan merupakan nilai yang optimum. Serbuk
BaFe12O19 dengan penmbahan 5%wt FeMo yang dikalsinasi pada temperatur
1000oC (β jam) menghasilkan σs = γ1,56 (4π x 10-7) Wb.m/kg; σr = 17,17 (4π x
10-7) Wb.m/kg; jHc = 445,36 (103/4π) A/m dan BHmax = 8,66 (10-1/4π) J/m3 dan
merupakan nilai optimum. Dari hasil analisis XRD serbuk tersebut diperoleh
59,2% fasa barium heksaferit (BaFe12O19), 24,11% fasa hematit (Fe2O3), dan
16,67% fasa barium oxide (BaO) dengan struktur kristal heksagonal,trigonal, dan
tertagonal. Bahan serbuk ini termasuk semihard magnetic dan memungkinkan
untuk digunakan sebagai bahan sensor magnetik.
Kata Kunci: BaFe12O19, FeMo, Mechanical Alloying, Kalsinasi, Vibrating Sample
Magnetometer.
Universitas Sumatera Utara
Synthesis and Characterization of BaFe 12O19 powder with FeMo
Additive by Mechanical Alloying Method
ABSTRACT
BaFe12O19 powder with FeMo (1, 3, 5, 7, dan 9%wt) additive has been synthesis
by mechanical alloying method and variation of calcination at temperature: 1000,
1100, and 1200 oC (2 h). The characterization of powder include: true density,
Optical Microscope (OM), Vibrating Sample Magnetometer (VSM), and X-Ray
Diffraction (XRD). The characterization result of true density before calcination
are 3,22 - 4,61 x 10-3 kg/m3, and the result of Optical Microscope are 106 – 92
nm. VSM analysis results with 5wt% FeMo additive are σs = 50,49 (4π x 10-7)
Wb.m/kg; σr = 23,83 (4π x 10-7) Wb.m/kg; jH c = 1106 (103/4π) A/m ; and BHmax =
137 (10-1/4π) J/m3 is the optimum value. After calcination at 1000 oC (2 h)
temperature, the results are σs = 31.56 (4π x 10-7) Wb.m/kg; σr = 17.17 (4π x 10-7)
Wb.m/kg; jH c = 445.36 (103/4π) A/m; and BHmax = 8.66 (10 -1/4π) J/m3 which is
the optimum value. XRD analysis showed that the powder BaFe 12O19 with 5wt%
FeMo addition has 59.2% barium hexaferrite (BaFe12O19), 24.11% hematite
(Fe2O3), and 16. 67% barium oxide (BaO) phase with hexagonal, trigonal, and
tetragonal crystal structure respectively. This material can be categorized semihard magnetic and possibility use for magnetic sensor material.
Keywords: BaFe12O19, FeMo, Mechanical Alloying, Calcination, Vibrating
Sample Magnetometer.
Universitas Sumatera Utara
Melalui Metode Mechanical Alloying
ABSTRAK
Telah dilakukan sintesis serbuk BaFe12O19 dengan penambahan aditif FeMo (1, 3,
5, 7, dan 9%wt) melalui metode mechanical alloying dan variasi temperatur
kalsinasi 1000, 1100, dan 1200 oC (2 jam). Karakterisasi yang dilakukan pada
serbuk meliputi: true density, Optical Microscope (OM), Vibrating Sample
Magnetometer (VSM), dan X-Ray Diffraction (XRD). Hasil karakterisasi true
density sebelum kalsinasi menghasilkan nilai berkisar 3,22 - 4,61 x 10
-3
kg/ m3
dan hasil karakterisasi Optical Microscope (OM) menghasilkan nilai 106 – 92 nm.
Hasil analisis VSM dengan penambahan 5%berat FeMo adalah σs = 50,49 (4π x
10-7) Wb.m/kg; σr = 23,83 (4π x 10-7) Wb.m/kg; jHc = 1106 (103/4π) A/m; dan
BHmax = 137 (10-1/4π) J/m3 dan merupakan nilai yang optimum. Serbuk
BaFe12O19 dengan penmbahan 5%wt FeMo yang dikalsinasi pada temperatur
1000oC (β jam) menghasilkan σs = γ1,56 (4π x 10-7) Wb.m/kg; σr = 17,17 (4π x
10-7) Wb.m/kg; jHc = 445,36 (103/4π) A/m dan BHmax = 8,66 (10-1/4π) J/m3 dan
merupakan nilai optimum. Dari hasil analisis XRD serbuk tersebut diperoleh
59,2% fasa barium heksaferit (BaFe12O19), 24,11% fasa hematit (Fe2O3), dan
16,67% fasa barium oxide (BaO) dengan struktur kristal heksagonal,trigonal, dan
tertagonal. Bahan serbuk ini termasuk semihard magnetic dan memungkinkan
untuk digunakan sebagai bahan sensor magnetik.
Kata Kunci: BaFe12O19, FeMo, Mechanical Alloying, Kalsinasi, Vibrating Sample
Magnetometer.
Universitas Sumatera Utara
Synthesis and Characterization of BaFe 12O19 powder with FeMo
Additive by Mechanical Alloying Method
ABSTRACT
BaFe12O19 powder with FeMo (1, 3, 5, 7, dan 9%wt) additive has been synthesis
by mechanical alloying method and variation of calcination at temperature: 1000,
1100, and 1200 oC (2 h). The characterization of powder include: true density,
Optical Microscope (OM), Vibrating Sample Magnetometer (VSM), and X-Ray
Diffraction (XRD). The characterization result of true density before calcination
are 3,22 - 4,61 x 10-3 kg/m3, and the result of Optical Microscope are 106 – 92
nm. VSM analysis results with 5wt% FeMo additive are σs = 50,49 (4π x 10-7)
Wb.m/kg; σr = 23,83 (4π x 10-7) Wb.m/kg; jH c = 1106 (103/4π) A/m ; and BHmax =
137 (10-1/4π) J/m3 is the optimum value. After calcination at 1000 oC (2 h)
temperature, the results are σs = 31.56 (4π x 10-7) Wb.m/kg; σr = 17.17 (4π x 10-7)
Wb.m/kg; jH c = 445.36 (103/4π) A/m; and BHmax = 8.66 (10 -1/4π) J/m3 which is
the optimum value. XRD analysis showed that the powder BaFe 12O19 with 5wt%
FeMo addition has 59.2% barium hexaferrite (BaFe12O19), 24.11% hematite
(Fe2O3), and 16. 67% barium oxide (BaO) phase with hexagonal, trigonal, and
tetragonal crystal structure respectively. This material can be categorized semihard magnetic and possibility use for magnetic sensor material.
Keywords: BaFe12O19, FeMo, Mechanical Alloying, Calcination, Vibrating
Sample Magnetometer.
Universitas Sumatera Utara