Magnetic Properties of Cu2+ Substituted BaFe12-xCuxO19 (x= 0.1,0.2,0.3,..., 4)

Abstract

Permanent magnet Barium M-Hexaferrite, BaFe12-x Cux O19 was synthesized with a wide range of x (x = 0.1, 0.2, …, 3 and 4mole% respectively). The precursor was made by mixing BaCO3 powder and Fe2O3 powder, whereas CuO powder was used as additive. The powders were mixed together by wet milling in distilled water medium for 20 hours. The powders had been dried at a temperature of 1000C for 24 h before calcined at a temperature of 11000C for 2 hours. The powders were then grained to prepare 400 mesh (38 μm) in diameter. The samples density was determined by using Archimedes method, magnetic properties by using permagraph, crystal structure by XRD-pattern and microwave absorbing properties using VNA. The hysteresis curve showed that the value of magnetic field ranging from 43.36 G to 100.42 G , remanence magnetic induction (Br) 20G-320G, coercivity (HcJ) 1.07 kOe to 9.22 kOe and energy production (BH) max from 0.05kGOe to 0.92 kGOe with a density from 3.82 g/cm3 to 5.2 g/cm3. The effect of Cu doping tent to increase the value of density with an optimum magnetic properties at x=0.3%mole.

Magnet permanen Barium M-Heksaferit, BaFe12-x Cux O19 disintesa dengan range x besar (x=0.1, 0.2, …, 3dan 4% mol). Bahan pelopor diuat dari pencampuran serbuk BaCO3 dan Fe2O3, sementara serbuk CuO sebagai aditif. Bahan serbuk dicampur dengan miling basah dalam media air terdestilasi selama 20 jam. Serbuk dikeringkan pada 100oC selama 24 jam sebelum dikalsinasi pada 1100oC selama 2 jam. Serbuk kemudian diayak lolos diameter 400 mesh (38 μm). Densitas sampel ditentukan dengan metode Archimedes, sifat magnet dengan menggunakan permagraph, struktur kristal dengan pola-XRD dan sifat penyerap gelombang mikro dengan VNA. Kurva hysteresis menunjukkan nilai medan magnet dari 43,36G sampai 100,42G, Induksi magnetic remanensi (Br) dari 20G-320G, Koersivitas (HcJ) 1,07 kOe sampai 9,22 kOe dan energy produksi max (BH) dari 0,05kGOe sampai 0,92kGOe dengan nilai densitas dari 3,82 g/cm3 sampai 5,2 g/cm3. Penambahan Cu cenderung meningkatkan nilai densitas dengan sifat magnet optimum pada x=0,3mol persen.