CAJ | 학술논문

用溶胶-凝胶法制备镍锌共掺杂Z型锶钴铁氧体Sr3(NiZn)xCo2(1-x)Fe24O41(x=0～0.5)粉末。用X射线衍射(XRD)和扫描电镜(SEM)表征该铁氧体粉末的晶体结构和表面形貌，并测试其室温磁滞回线和室温电阻率。用微波矢量网络分析仪测定该粉末在2～18 GHz微波频率范围的复介电常数和复磁导率，根据测量数据计算电磁损耗角正切及微波反射率，分析该材料的微波吸收性能与电磁损耗机理。结果表明：Sr3(NiZn)xCo2(1-x)Fe24O41粉末呈六角片状形貌，晶体结构为Z型，具有良好的软磁特性；x=0.3时该材料的电阻率最低，微波吸收效果最好，在13.5 GHz频率的吸收峰为25.1 dB，10 dB频带宽度为7.7 GHz，兼具强的磁损耗和弱的介电损耗。
용용효-응효법제비얼자공참잡Z형송고철양체Sr3(NiZn)xCo2(1-x)Fe24O41(x=0～0.5)분말。용X사선연사(XRD)화소묘전경(SEM)표정해철양체분말적정체결구화표면형모，병측시기실온자체회선화실온전조솔。용미파시량망락분석의측정해분말재2～18 GHz미파빈솔범위적복개전상수화복자도솔，근거측량수거계산전자손모각정절급미파반사솔，분석해재료적미파흡수성능여전자손모궤리。결과표명：Sr3(NiZn)xCo2(1-x)Fe24O41분말정륙각편상형모，정체결구위Z형，구유량호적연자특성；x=0.3시해재료적전조솔최저，미파흡수효과최호，재13.5 GHz빈솔적흡수봉위25.1 dB，10 dB빈대관도위7.7 GHz，겸구강적자손모화약적개전손모。
Ni, Zn-doped Z-type strontium ferrite Sr3(NiZn)xCo2(1-x)Fe24O41(x=0, 0.1, 0.2, 0.3, 0.4, 0.5) powder were prepared by sol-gel process.The structure, particle morphology, room temperature hysteresis loops of powders were characterized by X-ray diffraction (XRD), scanning electron microscope(SEM)and physical property measurement system(PPMS-9T), respectively. The room temperature resistivity of samples was measured by cylinder method. The complex permittivity and the complex permeability of samples were measured by microwave vector network analyzer in the frequency range from 2 to 18 GHz. The microwave reflectance and loss tangent were calculated from measurements, and the microwave absorbing properties and the electromagnetic loss mechanism of samples were studied. The results show that Sr3(NiZn)xCo2(1-x)Fe24O41 has a Z-type hexaferrite crystal structure, a micro-hexagonal flaky powder morphology and a good soft magnetic propertiy. When its thickness is 2.4 mm and x=0.3, it has a lower resistivity and the strongest microwave absorption that an peak is 25.1 dB at 13.5GHz and a bandwidth above 10 dB reaches 7.7 GHz. The microwave absorption of samples results from magnetic loss mainly and dielectric loss weakly.