STRUKTUR DAN SIFAT KEMAGNETAN NANOPARTIKEL HEKSAFERIT BaFe(12-2X)(MnNi)XO19 HASIL KOPRESIPITASI

Abstract

0,3; 0,7; 1,0) telah berhasil disintesis. Tujuan dari penelitian ini adalah untuk membuat heksaferit BaFe (12-2x) (MnNi) x O 19 dan mengamati pengaruh konsentrasi doping ion Mn dan Ni di dalam bahan heksaferit terhadap perilaku struktur dan sifat magnet. Heksaferit BaFe (12-2x) (MnNi) x O 19 dibuat dari bahan dasar Fe(NO 3 ) 3 , Ba(NO 3 ), Mn(NO 3 ) dan Ni(NO 3 ) dengan metoda kopresipitasi, yang kemudian diikuti perlakuan panas pada suhu 925 o C selama 3 jam. Produk BaFe (12-2x) (MnNi) x O 19 yang dihasilkan kemudian dikarakterisasi menggunakan peralatan difraktometer sinar-X (XRD), Scanning Electron Microscope (SEM), Vibrating Sample Magnetometer (VSM) dan Fourier Transform-Infra Red (FT-IR). Data XRD yang dihasilkan dianalisis menggunakan program General Structure Analysis System (GSAS). Hasil refinement XRD menunjukkan bahwa substitusi ion-ion Ni dan Mn kedalam Ba heksaferit dapat mengubah perilaku parameter struktur, seperti parameter kisi, volume unit sel dan kerapatan atom. Bentuk dan distribusi ukuran partikel Ba heksaferit mengalami perubahan dengan penambahan doping ion Mn dan Ni. Demikian pula , perilaku sifat kemagnetan seperti koersivitas intrinsik (H ci ), magnet saturasi (M s ) dan magnet remanen (M r ) dari Ba heksaferit hasil substitusi berubah dengan penambahan substitusi ion-ion Ni dan Mn. 0.3; 0.7; 1.0) hexaferrite nanoparticle has been successfully synthesized. The purpose of this study is to synthesize BaFe (12-2x) (MnNi) x O 19 heksaferit and to study the effect of Mn and Ni ion doping concentration in hexaferrite to the parameter structure and the magnetic properties. BaFe (12-2x) (MnNi) x O 19 hexaferrite was prepared made from Fe(NO 3 ) 3 , Ba(NO 3 ), Mn(NO 3 ) dan Ni(NO 3 ) raw materials using co-precipitation method, which is then followed by heat treatment at 925 o C during 3 hours. The product is then characterized using X-Ray Diffraction Apparatus (XRD), Scanning Electron Microscope (SEM), Vibrating Sample Magnetometer (VSM) and Fourier Transform-Infra Red (FT-IR). XRD data were analyzed using a general program structure analysis system (GSAS). The XRD refinement result showed that the substitution of Ni and Mn ions into the hexaferrite can change the behavior of structural parameters, such as lattice parameters, unit cell volume and the atomic density. The particle size distribution and shape of hexaferrrite changed with the addition of Mn and Ni ion doping. Similarly, the behavior of magnetic properties such as intrinsic coercivity (H ci ), magnetic saturation (M s ) and magnetic remanence (M r ) of substituted hexaferrite change with the addition of Ni and Mn ions.

The process of making BaM (BaFe12O19) samples based on natural iron sand doped with metal (Co-Cu-Zn) using the coprecipitation method

“…The metal ions that can be used are those that have almost the same size as Cobalt (Co) [6,7], Copper (Cu) [6], and Zinc (Zn) [6,8].The doping was carried out to reduce the anisotropic properties of the Barium M-Hexaferrite (BaM) type without changing the structure. The synthesis process has various methods, such as sol-gel [9][10], powder metallurgy method [11], and coprecipitate method [12].…”