低损耗石榴石铁氧体材料及其在环行器中的应用研究

发布时间：2018-02-17 06:55

本文关键词： 钇铁石榴石铁氧体氧化物固相烧结离子取代铁磁共振线宽微带环行器　出处：《电子科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：钇铁石榴石铁氧体材料(YIG)是研究其他石榴石铁氧体材料的基础,且因其特有的旋磁特性以及优良的性能参数(窄线宽等)而被广泛地应用于不同频段的微波铁氧体器件当中。因此对钇铁石榴石铁氧体材料(YIG)进行改性研究成为了当今的主要课题之一。本文采用离子取代的方式,并通过固相烧结制备出了Y3Fe5-xSbxO12(x=0~0.4)、Y3-xCaxFe5-xZrxO12(x=0~0.6)、Y3Fe5-2xZnxZrxO12(x=0~0.3)、Y3-xCaxFe5-xSnxO12(x=0~0.6)、Y3Fe5-2xZnxSnxO12(x=0~0.35)铁氧体材料,详细研究了离子取代量对钇铁石榴石铁氧体微观结构以及磁性能的影响。研究表明,Sb3+取代使得石榴石铁氧体材料的铁磁共振线宽增大,介电常数也在不断地增加。Ca2+Zr4+共取代,Zn2+Zr4+共取代、Ca2+Sn4+共取代、Zn2+、Sn4+共取代都可以降低材料的铁磁共振线宽,即降低材料的磁损耗,四种取代分别在x=0.4,0.1,0.3,0.25时取得最小值,但是随着离子取代量的增加,含有Zr离子的取代可能会生成另相,Sn离子在实验中x取值范围内,取代离子都进入了晶格而随着离子取代量的增加,钇铁石榴石铁氧体的密度与饱和磁化强度等性能根据取代离子的不同而发生变化。本论文还研究制备出了1.4-1.6GHz的微带环行器,根据YIG材料的旋磁特性,并且运用铁氧体微带环行器的设计理论方法,设计出环行器的尺寸,运用HFSS软件进行仿真优化,最终得到最优尺寸结果,运用CAD制图,采用丝网印刷工艺制备出了环行器,并制备出了一个测试夹具便于测试环行器的S参数。本文采用矢量网络分析仪测试环行器的S参数,确定了环行器的设计是可行的,也验证了本实验中制备的YIG材料的实用性。
[Abstract]:Yttrium iron garnet ferrite (YIG) is the basis of other garnet ferrite materials, and because of its unique characteristics of rotating magnetic field and the parameter of excellent (Zhai Xiankuan) has been widely used in microwave ferrite devices with different frequency. So the yttrium iron garnet ferrite body material (YIG) was modified to become one of the main topics today. This paper adopts ion substitution method, and through the solid phase sintering was prepared by Y3Fe5-xSbxO12 (x=0~0.4), Y3-xCaxFe5-xZrxO12 (x=0~0.6), Y3Fe5-2xZnxZrxO12 (x=0~0.3), Y3-xCaxFe5-xSnxO12 (x=0~0.6), Y3Fe5-2xZnxSnxO12 (x=0~0.35) ferrite material investigated the amount of yttrium iron garnet ferrite microstructure and magnetic properties. The results show that Sb3+ substituted the ferromagnetic resonance linewidth of garnet ferrite increases, the dielectric constant increases continuously in.Ca2 +Zr4+ Co Zn2+Zr4+ co substitution, substitution, Ca2+Sn4+ Zn2+, Sn4+ substitution, CO substitution can reduce the ferromagnetic resonance linewidth of materials, which reduce the magnetic loss material, four substituted respectively when x=0.4,0.1,0.3,0.25 has a minimum value, but with the increase of the amount of ion substitution, substitution may generate another phase containing Zr ion Sn, X ion in the experiment range, substituted ions into the lattice with the increase of the amount of ion substituted yttrium iron garnet ferrite density and saturation magnetization properties changes according to the different substituted ions. This thesis also studies the fabricated microstrip circulator according to 1.4-1.6GHz. Gyromagnetic properties of YIG materials, and the use of the design theory of ferrite microstrip circulator, design a circulator size, were simulated by HFSS software, then get the optimal size results, using CAD mapping, mining With the screen printing process to fabricate the circulator, and prepared the S parameters of a test fixture for testing the circulator. This paper uses the S parameter vector network analyzer circulator, determine the design of the circulator is feasible, also verified the practicability of the YIG materials prepared in this experiment.

【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM277;TN621

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