摘要
Cu-Ni alloy nanoparticles were prepared by a microwave combustion method with the molar ratios of CU2＋ to Ni2＋ as 3：7, 4：6, 5：5, 6：4 and 7：3. The as-prepared samples were characterized by XRD, HR-SEM, EDX and VSM. XRD and EDX analyses suggest the formation of pure alloy powders. The average crystallite sizes were found to be in the range of 21.56-33.25 nm. HR-SEM images show the clustered/agglomerated particle-like morphology structure. VSM results reveal that for low Ni content （CusNis, Cu6Ni4 and Cu7Ni3）, the system shows paramagnetic behaviors, whereas for high Ni content （Cu3Ni7 and Cu4Ni6）, it becomes ferromagnetic.
采用微波燃烧法制备Cu2＋和Ni2＋摩尔比分别为3∶7,4∶6,5∶5,6∶4和7∶3的Cu-Ni合金纳米粒子,采用XRD、HR-SEM、EDX和VSM对所制备的样品进行表征.X射线衍射和能谱分析表明,在样品制备过程中形成了纯合金粉末.样品的平均晶粒尺寸为21.56～33.25 nm.HR-SEM像显示样品具有集群/团簇粒状形态结构.VSM分析结果表明,对于低Ni含量的合金（Cu5Ni5,Cu6Ni4和Cu7Ni3）,样品显示顺磁性,而对于较高Ni含量的合金（Cu3Ni7和Cu4Ni6）,样品呈现铁磁性.
