【摘要】 采用直流电弧等离子体法在甲烷 (CH4)、氢氩、氨气、氨氮气氛下制备了钐铁合金的多种纳米粉 .在甲烷气氛下没有钐或铁的氧化物生成 ,但生成Fe3 C ;在氢氩和氨氮气氛下 ,有钐的氧化物 .在纯甲烷气氛下制备的样品矫顽力最大 ,在氨氮气氛下样品的饱和磁化强度和剩余磁化强度最高 ,而且矫顽力中等 .分析了氨氮气氛下样品高温结晶前后结构和磁学性质的异同 ,发现再结晶过程中样品被氧化了 ,磁学性能急剧下降更多还原

【Abstract】 Nanoparticle has been prepared by Sm 2Fe 17 in methane(CH 4),a mixture of H 2 and Ar ,Ammonia(NH 3),a mixture of NH 3 and Nitrogen(N 2)by DC arc discharges.No oxide of samarium or iron was formed during evaporating metal in CH 4 gas, but Fe 3C was formed. Oxide of samarium was formed both in a mixture of H 2 and Ar and a mixture of NH 3 and Nitrogen(N 2) atmosphere.It has been found that coercive force of sample in methane(CH 4) gas was greatest,but saturated magnetic intensity and residual magnetism of sample in a mixture of NH 3 and Nitrogen(N 2) atmosphere were highest while the coercive force wasn’t low. The samples formed in a mixture of NH 3 and Nitrogen (N 2) atmosphere was tested and property before and after were analyzed high temperature crystallization production and analyzed their similarities and differences of crystal structure and magnetic. It was found that the sample was oxidized during crystallization and its magnetic property sharply decent.更多还原