近年來，無線網路與行動電話等通訊裝置發展快速，因此高頻通訊之需求與日俱增，多功能微型通訊零件將可符合未來市場之需求。而目前國內所使用之低溫共燒磁性陶瓷多為NiCuZn鐵氧磁體，但其應用頻段受到Snoek極限之限制，使其無法應用於大於300 MHz以上之通訊元件。因此如何開發可低溫燒結且具有高初始磁導係數、高截止頻率(＞300 MHz)之磁性鐵氧磁體就變得相當重要。現則多為利用低溫共燒陶瓷技術(LTCC)。本文藉由添加將B2O3–Bi2O3–ZnO–SiO2玻璃於Y相鐵氧磁體2(Ba1-xBixO)．2(ZnyCo0.8-yCu0.2O)．6(Fe2-x/3Znx/3O3)中，探討主成分之調整(x、y之含量)及玻璃添加量對Y相鐵氧磁體燒結行為、微結構、磁以及介電性質之影響。研究結果指出，在未添加玻璃情況下，當添加微量Bi和Zn(x = 0.1、0.2，y =0.3、0.4)，在燒結溫度≦10500C時，可得到純Y相之鐵氧磁體。當Bi和Zn之含量為0.1與0.3，玻璃添加量為4wt%時，可低於9000C燒結緻密化。當Y相鐵氧磁體中添加，BB35SZ玻璃助燒結劑時，可使Y相鐵氧磁體緻密化之燒結溫度從10500C降至9000C;當組成x為0.1，y為0.3而玻璃添加量為4wt%之坯體，經9000C燒結後，其燒結體之相對密度可大於90%且有最佳磁導係數≧3、磁性品質因子≧30之磁性質。

It is a great challenge for chip-type magnetic components because it need to be co-fired with Ag electrode. Effects of B2O3–Bi2O3–ZnO–SiO2 (BB35SZ, where 35 = the mole fraction of Bi2、O3 in the glass) glass addition on the sintering behavior , magnetic and dielectric properties for Y-type ferrite 2(Ba1-xBixO)．2(ZnyCo0.8-yCu0.2O)．6(Fe2-x/3Znx/3O3) ceramics were investigated in developing low temperature co-fired ceramics (LTCC) for electronic components. The results indicate that the samples doped with minor Bi and Zn (x = 0.1、0.2 ， y =0.3、0.4) and without glass addition , pure Y-type hexagonal ferrite can be obtained. The Bi samples (x =0.1 y =0.3) added with 4wt% BB35SZ can be densified under 9000C. As a result, BB35SZ glass can be used as a sintering aid to reduce the densification temperature of Y-type ferrites from 10500C to 9000C without secondary phase formation. Y-type ferrite ceramics added with 4wt% BB35SZ glass and sintered at 9000C showed a relative density higher than 90%, a high permeability higher than 3, a permittivity lower than 20. The Bi–Zn co-doped (x =0.1，y =0.3) sample added with 4wt% BB35SZ glass exhibited excellent magnetic and dielectric properties in hyper frequency, which can be a promising candidate material for multi-layer chip-inductive components.

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