Pengaruh Suhu Sintering pada Magnet Ndfeb (Neodymium Iron Boron) terhadap Sifat Fisis, Sifat Magnetik dan Struktur Kristalin

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 400o C, 700o C, 900o C and 1000o C 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 400o Cto 1000 o Cchanged 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 o Cand 900 o C and overall crystalline powder is Semi-Hard Magnetic.