六角M型钡铁氧体材料的低温烧结与基本磁性能研究

【作者】 李娅波；

【导师】 刘颖力；

【作者基本信息】 电子科技大学 ， 电子信息材料与元器件， 2008， 硕士

【摘要】 本文的工作围绕毫米波旋磁铁氧体器件用的六角BaM铁氧体材料这一主题而展开,旨在通过采用陶瓷工艺,经过掺杂和工艺调整,制备研究适于LTCF技术要求的微波铁氧体器件用M型钡铁氧体材料,研究材料结构与性能的关系;物相与工艺参数的关系;高频磁性能与配方、材料结构及工艺的关系;低温烧结的机理;通过精细制粉及助烧剂的添加以期研制出一种符合微波铁氧体器件性能要求又符合LTCF工艺技术要求的六角铁氧体材料。在材料研制方面,采用氧化物（固相反应）法研制了一种实用的低温共烧M型Ba铁氧体材料。首先明确了M型铁氧体配方设计的基本原则,并在此基础上详细研究了材料结构与性能的关系、物相与工艺参数的关系、高频磁性能与配方、材料结构及工艺的关系;确定最佳的工艺参数;研究了掺杂Bi₂O₃等物质对M型铁氧体材料电磁性能的影响,证实掺杂助烧剂可以显著的降低材料的烧结温度;又研究了不同的离子（如ZnTi、CoTi等）取代对材料性能的影响。最后在一次球磨6小时、预烧温度1100℃、Bi₂O₃掺杂量为3wt%或V₂O₅的掺杂量为0.75%、二次球磨时间为9小时、在900℃烧结后制得了不同参数的M型铁氧体材料。通过对钡铁氧体掺杂实现了低温烧结,由于M型钡铁氧体具有的高磁晶各向异性内场,降低烧结温度使其有望实现通过LTCF（低温共烧铁氧体）技术研制片式化的微波/毫米波旋磁器件。更多还原

【Abstract】 The work of this paper surround millimeter-wave gyromagnetic ferrite component’s hex-ferrite to expand, Using the ceramics and adjusting the adulteration and technology, M-type Ba ferrite material for microwave ferrite component was prepared in order to fit the LTCF（low temperature co-fire ferrite） technology. The research include: the relation of material structure and performance; the relation of microstructures and technics parameter; the relation of high frequency magnetic properties and compositions、material structure and technology; the mechanism of low temperature sinter. Through fine milling and adding dopants, one kind of applicable low temperature co-fired M-type Ba ferrite material was prepared in order to fit the LTCF technology.In the part of experiments investigations, one kind of applicable low temperature co-fired M-type Ba ferrite material was prepared by the oxide method （solid-phase reaction）. At first the basic principle of the compositions was defined, In this foundation, the relation of material structure and performance;the relation of microstructures and technics parameter; the relation of high frequency magnetic properties and compositions、material structure and technology was studied, Effect of adding Bi2O3 on the electromagnetic properties of Ba ferrite was investigated, it showed that adding this dopants can reduce the sintering temperature of Ba ferrite material evidently. The improvement on the electromagnetic properties of Ba ferrite by controling different ion substitute（such as ZnTi、CoTi） were studied also. Finally, the high performance Ba ferrite material was prepared on the condition of first milling is 6 hours, calcining at 1100℃, adding 3.0wt%Bi₂O₃ or 0.75wt% V₂O₅, second milling for 9h, sintering at 900℃. Through adding the dopant, low temperature of M-type ferrite was obtained. Because M-type Ba ferrite has high anisotropy inner field, the decrease of the ferrite sintering temperature makes the slice millimeter wave component through LTCF technology to become possible.更多还原