CAJ | 학술논문

利用溶剂热法,在醋酸钠静电保护剂的辅助下,成功制备出Fe_3O_4和Zn~(2+)掺杂型Zn_(0.07)Fe_(2.93)O_4纳米晶.利用X射线衍射仪和扫描电子显微镜等对样品的晶体结构、粒径、形貌和化学组成进行了分析.结果表明,所得纳米晶的粒径均匀,形貌为球形,分散度好;Zn_(0.07)Fe_(2.93)O_4纳米晶的平均粒径(70 nm)明显小于Fe_3O_4(170 nm).磁性能测量结果表明,室温下Zn_(0.07)Fe_(2.93)O_4的饱和磁化强度(54.2 A·m~2·kg~(-1))小于Fe_3O_4 (81.6 A·m~2·kg~(-1)).利用矢量网络分析仪对样品的电磁性能和吸波性能进行了研究.结果表明,Zn~(2+)掺杂型Zn_(0.07)Fe_(2.93)O_4纳米晶的吸波性能优于Fe_3O_4,前者的最大吸收峰(-19.3 dB)大于后者(-9.8 dB),且吸收峰低于-10 dB的峰宽达2.5 GHz.
이용용제열법,재작산납정전보호제적보조하,성공제비출Fe_3O_4화Zn~(2+)참잡형Zn_(0.07)Fe_(2.93)O_4납미정.이용X사선연사의화소묘전자현미경등대양품적정체결구、립경、형모화화학조성진행료분석.결과표명,소득납미정적립경균균,형모위구형,분산도호;Zn_(0.07)Fe_(2.93)O_4납미정적평균립경(70 nm)명현소우Fe_3O_4(170 nm).자성능측량결과표명,실온하Zn_(0.07)Fe_(2.93)O_4적포화자화강도(54.2 A·m~2·kg~(-1))소우Fe_3O_4 (81.6 A·m~2·kg~(-1)).이용시량망락분석의대양품적전자성능화흡파성능진행료연구.결과표명,Zn~(2+)참잡형Zn_(0.07)Fe_(2.93)O_4납미정적흡파성능우우Fe_3O_4,전자적최대흡수봉(-19.3 dB)대우후자(-9.8 dB),차흡수봉저우-10 dB적봉관체2.5 GHz.
Fe_3O_4 and Zn_(1-x)Fe_(2+x)O_4 nanocrystallines were successfully prepared using NaAc as protective reagents via solvothermal method. The structure, size, morphology and chemical composition of the products were investigated in detail by X-ray diffraction(XRD) and scanning electron microscopy(SEM).The results indicate that the monodisperse nanocrystallines are nanospheres and the averaged size of Zn_(0.07)Fe_(2.93)O_4(70 nm) is smaller than that of Fe_3O_4(170 nm). The magnetic properties of the sample were investigated and revealed that the saturation magnetization(54.2 A·m~2·kg~(-1)) of Zn_(0.07)Fe_(2.93)O_4 nanocrystalline was smaller than that of Fe_3O_4(81.6 A·m~2·kg~(-1)). The electromagnetic performance and microwave adsorption efficiency of both nanocrystallines were measured by a vector network analyzer(VNA) technique in a frequency region 2-18 GHz. The results indicate that Zn_(0.07)Fe_(2.93)O_4 nanocrystallines exhibit better microwave adsorption efficiency. For example, the Zn_(0.07)Fe_(2.93)O_4 nanocrystalline, the reflection loss maxium is 19.3 dB, almost equal to the double values of Fe_3O_4 (9.8 dB), and the bandwidth with a reflection loss more than 10 dB is up to 2.5 GHz.