Y型平面六角铁氧体材料低温烧结的研究
发布时间：2019-05-14 00:13
【摘要】：随着现代电子技术的快速发展,电子元器件逐渐趋向于微型化、片式化。目前主流的发展方向是把电阻、电容、电感与作为内电极材料的Ag进行低温共烧做成具有“独石”结构的多层片式元器件。在电子技术向高频化发展的今天,传统的尖晶石结构Ni-Cu-Zn铁氧体因损耗过大已经不能满足其作为电感材料在甚高频段应用的需求。而Y型平面六角铁氧体材料由于其结构决定的磁晶各向异性,在甚高频段具有较高的起始磁导率,高截止频率,高品质因数,高热稳定性,低的磁损耗和低的介电损耗,使其有望成为多层片式电感的理想材料。本论文采用传统的可用于大规模工业化生产的固相反应法制备Y型平面六角铁氧体材料。对于影响其低温烧结的配方,工艺和掺杂做了创新性和探索性的研究。主要内容为:1.研究了离子掺杂对Y型平面六角铁氧体材料低温烧结电磁性能的影响。发现随着Cu含量的增加晶粒尺寸将会逐渐增加,烧结密度逐渐降低。起始磁导率总体随Cu含量增加而增加。但随着Cu含量的增加,其增加到一定程度的时候会引起损耗的突然大幅度增加。起始磁导率总体随Zn含量增加而增加。但过高的Zn含量会导致截止频率降低。综合各方面参数考虑最佳配方为Ba2Co0.2Zn0.9Cu0.9Fe12O22,烧结温度为900℃。2.为了降低烧结温度,提高烧结致密性,研究了烧结助剂的影响。研究发现Bi2O3对磁导率变化影响不大,Bi2O3含量为2.5wt%时介电常数最小,此时介电损耗和磁损耗都低于10-2满足研究需求。200 MHz时磁导率为7.98,介电常数为14.10,磁损耗1.28×10-2,介电损耗5.91×10-3。3.为了降低烧结助剂的含量,研究了BBSZ(Bi2O3-H3BO3-SiO2-ZnO)取代Bi2O3掺杂。研究发现掺杂0.8wt%的BBSZ就可以进一步降低烧结温度至860℃,较掺杂Bi2O3时,产品磁导率和介电常数均有上升。
[Abstract]:With the rapid development of modern electronic technology, electronic components gradually tend to miniaturization. At present, the mainstream development direction is to make multi-layer chip components with "single stone" structure by co-firing resistance, capacitance, inductor and Ag as internal electrode material at low temperature. With the development of electronic technology to high frequency, the traditional spinel structure Ni-Cu-Zn Ferrite can not meet the needs of its application as inductor material in very high frequency band because of its excessive loss. The Y-type planar hexagonal Ferrite material has high initial permeability, high cutoff frequency, high quality factor, high thermal stability, low magnetic loss and low dielectric loss due to its structure-determined magneto-crystal anisotropy, which has high initial permeability, high cutoff frequency, high quality factor, high thermal stability, low magnetic loss and low dielectric loss. It is expected to be an ideal material for multi-layer chip inductors. In this paper, Y-type planar hexagonal Ferrite materials were prepared by traditional solid state reaction method, which can be used in large-scale industrial production. Innovative and exploratory research on the formula, process and doping of low temperature sintering has been carried out. The main contents are as follows: 1. The effect of ion doping on the electromagnetic properties of Y-type planar hexagonal Ferrite at low temperature was studied. It is found that with the increase of Cu content, the grain size will increase and the sintering density will decrease gradually. The initial permeability increases with the increase of Cu content. However, with the increase of Cu content, the loss will increase suddenly and greatly when it increases to a certain extent. The initial permeability increases with the increase of Zn content. However, excessive Zn content will lead to a decrease in the cut-off frequency. The optimum formula is that the sintering temperature of Ba2Co0.2Zn0.9Cu0.9Fe12O22, is 900鈩，
本文编号：2476285
[Abstract]:With the rapid development of modern electronic technology, electronic components gradually tend to miniaturization. At present, the mainstream development direction is to make multi-layer chip components with "single stone" structure by co-firing resistance, capacitance, inductor and Ag as internal electrode material at low temperature. With the development of electronic technology to high frequency, the traditional spinel structure Ni-Cu-Zn Ferrite can not meet the needs of its application as inductor material in very high frequency band because of its excessive loss. The Y-type planar hexagonal Ferrite material has high initial permeability, high cutoff frequency, high quality factor, high thermal stability, low magnetic loss and low dielectric loss due to its structure-determined magneto-crystal anisotropy, which has high initial permeability, high cutoff frequency, high quality factor, high thermal stability, low magnetic loss and low dielectric loss. It is expected to be an ideal material for multi-layer chip inductors. In this paper, Y-type planar hexagonal Ferrite materials were prepared by traditional solid state reaction method, which can be used in large-scale industrial production. Innovative and exploratory research on the formula, process and doping of low temperature sintering has been carried out. The main contents are as follows: 1. The effect of ion doping on the electromagnetic properties of Y-type planar hexagonal Ferrite at low temperature was studied. It is found that with the increase of Cu content, the grain size will increase and the sintering density will decrease gradually. The initial permeability increases with the increase of Cu content. However, with the increase of Cu content, the loss will increase suddenly and greatly when it increases to a certain extent. The initial permeability increases with the increase of Zn content. However, excessive Zn content will lead to a decrease in the cut-off frequency. The optimum formula is that the sintering temperature of Ba2Co0.2Zn0.9Cu0.9Fe12O22, is 900鈩，
本文编号：2476285
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