PENGARUH UKURAN BOLA MILLING TERHADAP NILAI SUSEPTIBILITAS MAGNETIK DAN DISTRIBUSI UKURAN NANOPARTIKEL MAGNETIK DISINTESIS DARI PASIR PANTAI SUNGAI SUCI BENGKULU

Research on the magnetic susceptibility and size distribution of magnetic nanoparticles of beach sand Sungai Suci Bengkulu has been done. The samples were synthesized using ball milling. Iron oxide and non-iron oxide particles of ball milling products were separated using Neodymium Iron Boron (NdFeB) magnets. Magnetic induction measurement on ball milling products has been carried out using Pasco magnetic probes. Product of NdFeB was milled for 60 hours using milling ball combination of 0.5, 0.7 and 1.5 cm in diameter and the product is called BM1 product. This product was divided into three parts called BM1A, BM1B and BM1C then milled separately for 40 hours using milling balls with diameter of 0.5, 0.7, 1.5 cm, respectively. The products of this ball milling are called BM2A, BM2B, BM2C. The results show that magnetic susceptibility of BM II products increases with increasing milling ball size that is 9215.48 × 10 -5 , 10097.64 × 10 -5 and 11056.86 × 10 -5 for milling ball size of 0.5, 0.7 and 1.5 cm, respectively. The particle size distributions of the samples were determined using the Particle Size Analyzer (PSA). The results show that the distribution of particle size at a percentage of 10% is 0,40 µm and 1,30 µm for BM2A and BM2C, respectively.