中文摘要：

NdFeCo 磁性的粉末被熔炼，高精力的球 milling 和氧化热对待的过程准备。吸收 NdFeCo 磁性的粉末的性质的阶段作文和微波上的氧化热处理和公司内容的效果被 X 光检查衍射计(XRD ) 和向量网络分析器调查。在氧化热处理前的 Nd23.25Fe36.75Co40 粉末的最小的反射率是 6.2 dB，并且氧化粉末的减少了到 14.0 dB。吸收 NdFeCo 磁性的粉末的性质的微波能被氧化热处理有效地改进。随公司内容的增加，减少的 Fe2O3 和 Nd2O3 增加了；当公司的内容增加了到 40% 时， Fe3Co7 阶段出现了(集体比率) ；吸收山峰被发现向更低的频率区域第一移动，然后它向一个更高的频率区域移动了。Nd23.25Fe66.75Co10 粉末最好在专心于微波 3-13 GHz 的频率乐队的全面性质。当涂层厚度(d) 是 1.8 公里时，最小的反射率和吸收山峰频率的价值分别地是 19.7 dB 和 4.8 GHz。

英文摘要：

NdFeCo magnetic powder was prepared by the process of smelting, high-energy ball milling and oxidation heat treating. The effects of oxidation heat treatment and Co content on phase composition and microwave absorbing properties of NdFeCo magnetic powder were investigated by an X-ray diffractometer （XRD） and vector network analyzer. The minimum reflectivity of Nd23.25Fe36.75Co40 powder before oxidation heat treatment was 4.2 dB, and that of oxidized powder decreased to -14.0 dB. The microwave absorbing properties of NdFeCo magnetic powder could be improved effectively by oxidation heat treatment. With the increase of Co content, the Fe2O3 reduced and the Nd2O3 increased; Fe3CO7 phase appeared when the content of Co increased to 40% （mass ratio）; the absorption peak was found to move towards lower frequency region first, and then it moved towards a higher frequency region. Nd23.25Fe06.75Co10 powder had better comprehensive properties in absorbing microwave in the frequency band of 3-13 GHz. The value of minimum reflectivity and absorption peak frequency, when the coating thickness （d） was 1.8 mm, were -19.7 dB and 4.8 GHz, respectively.