Pengaruh Suhu Sintering Pada Magnet NdfeB (Neodymium Iron Boron) Terhadap Sifat Fisis, Sifat Magnetik dan Struktur Kristalin

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PENGARUH SUHU SINTERING PADA MAGNET NdFeB

(Neodymium Iron Boron) TERHADAP SIFAT FISIS, SIFAT

MAGNETIK DAN STRUKTUR KRISTALIN

ABSTRAK

Telah dilakukan penelitian pada pengaruh suhu sintering magnet NdFeB terhadap sifat fisis, sifat magnet dan struktur kristalin. Suhu sintering yang divariasikan 400oC,700 oC, 900 oC dan 1000 oC dengan penahanan selama 1 jam.Karakterisasinya meliputi sifat fisis (bulk density), magnetik(fluks density dan VSM) dan struktur kristalin (XRD). Proses pembuatan magnet NdFeB dari bahan

flakes NdFeB pada pengaruh suhu sintering, dimana bahan dimilling selama 72 jam menggunakan Toluene. Proses pembuatan magnet tersebut dilakukan dalam vacuum dengan media gas nitrogen.Berdasarkan analisa struktur XRD pada

pembuatan magnet NdFeBdari suhu sintering 400 oC hingga suhu 1000 oC struktur kristalnya berubah. Kuat medan dan bulk density magnet NdFeB yang didapatkan pada pengaruh suhu sintering semakin menurun/kecil. Hasil dari pengujian VSM pada serbuk kristal NdFeB didapatkan bahwa tanpa disintering nilai remanen 37,34 emu/g , koersifitas 1,07 kOe dan BHmax 0,76 MGOe, nilai-nilai tersebut lebih besar dibandingkan pada suhu sintering 400 oC dan 900 oC dan secara keseluruhan serbuk kristal NdFeB bersifat Semi-Hard Magnetic.

Kata kunci: Suhu sintering, Struktur kristalin, vacuum, Semi-Hard Magnetic.

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THE EFFECT OF SINTERRING TEMPERATURE IN MAGNET NdFeB

(Neodymium Iron Boron) ON PHYSICAL PROPERTIES, MAGNETIC

PROPETIES AND CRYSTALLINE STRUCTURE

ABSTRACT

Research on the effect of sinterring temperature in magnet NdFeB on physical

properties, magnetic properties and crystalline structure has been done. The

sinterring of kind 400oC, 700oC, 900oC and 1000oC with detention for an hour. Characterized includes physical properties (bulk density), magnetic (flux density

and VSM) and crystalline structure (XRD). The process of making magnet NdFeB

of flakes NdFeB on the effect of sinterring temperature, where the milling on 72

hours using toluene. The process of making it do in vacuum with the nitrogen gas

medium. Based on the analysis of the structure of XRD in the manufacture of

magneticNdFeB of the sinterring 400oCto 1000 oCchanged crystal structure. Strong field and bulk density of the magnet NdFeB that obtained in the effect of

sinterring temperature has declined or small. Results of testing VSM on crystal

powder without sintering NdFeB found that remanence value of 37.34 emu / g,

coersivity 1.07 kOeand BHmax 0.76MGOe, the values are greater than the

sinterring temperature of 400 oCand 900 oC and overall crystalline powder is Semi-Hard Magnetic.

Keywords: temperature sinterring, a crystalline structure,vacuum,semihard magnetic

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