CAJ | 학술논문

采用传统陶瓷工艺制备了NiCuZn系铁氧体材料。采用流延法制备了长宽为125×125mm、厚度为50~200μm的NiCuZn铁氧体薄片。测试了铁氧体材料的微观形貌与磁导率谱，研究了材料微观形貌对材料的谐振频率的影响，讨论了Zn含量对材料的磁导率与谐振频率的影响，探讨了当铁氧体薄片应用于射频识别（RFID）系统时，铁氧体薄片的磁参数对可读写距离的影响，分析了应用不同材料可读写距离存在差异的原因。研究表明，材料的晶粒大部分处于单畴状态时有利于提高材料的谐振频率；随着Zn含量的减小，材料的磁导率逐渐降低、谐振频率逐渐增高。在磁导率虚部较小时，可读写距离与磁导率实部近似成正比。
채용전통도자공예제비료NiCuZn계철양체재료。채용류연법제비료장관위125×125mm、후도위50~200μm적NiCuZn철양체박편。측시료철양체재료적미관형모여자도솔보，연구료재료미관형모대재료적해진빈솔적영향，토론료Zn함량대재료적자도솔여해진빈솔적영향，탐토료당철양체박편응용우사빈식별（RFID）계통시，철양체박편적자삼수대가독사거리적영향，분석료응용불동재료가독사거리존재차이적원인。연구표명，재료적정립대부분처우단주상태시유리우제고재료적해진빈솔；수착Zn함량적감소，재료적자도솔축점강저、해진빈솔축점증고。재자도솔허부교소시，가독사거리여자도솔실부근사성정비。
NiCuZn ferrites were prepared by conventional ceramics preparation technique, and then ferrite sheet with width of 125×125mm and thickness of 50-200μm were prepared by tape casting process. The microstructure and magnetic spectrum of the ferrite sheet were measured, and effects of microstructure of the material on its resonance frequency were investigated. The effects of Zn content on the permeability and resonance frequency of the material were also researched. Applied to the RFID system, the effects of the magnetic parameter of the ferrite sheet on the read/write distance was discussed. The mechanism of the disparities of the read/write distance were analyzed, when different materials were applied. The results indicates that the material with most grains being momodomain could promote its resonance frequency. The permeability of the material decreases but the resonance frequency increases with reducing Zn content. The read/write distance is proportional toμ′ approximately whenμ″ is small.