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The Effect of NaCl Prepared by Ultra-sonic Vibration on the Sintering of Annealed FePt Nanoparticles
並列摘要
FePt nanoparticles were synthesized via a high-temperature solution phase. Monodispersed 3.5nm FePt nanoparticles were first obtained by reduction of FeCl2•4H2O and Pt(acac)2. These preformed FePt nanoparticles were then combined with NaCl to pre-vent them from sintering after annealing. The one micron salt particles were fabricated by the ultra-sonic vibration method and used as the separating media. Annealing studies show that these salt-matrix FePt nanoparticles are stable after annealing at 700℃ for 4h. The diameter of the annealed FePt particles increases from 4 to 25nm as observed by TEM. The magnetic properties are largely affected by the annealing temperature. The role of these salt particles on the sintering of annealed FePt nanoparticles has been investigated.
並列關鍵字
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