基于微波铁氧体材料在低温共烧陶瓷(LTCC)术领域的重要应用前景,采用固相法以 Bi2 O3、CuO、PbO、B2 O3、MoO3和高岭土(Al2 O3?2SiO2?2H2 O)为烧结助剂制备了低温烧结六角晶 M 型锶铁氧体(SrFe12 O19)材料.结果表明,烧结助剂对材料的晶体结构、致密度、直流电阻率和静态磁学性能影响显著.通过调整Bi2 O3、CuO 和PbO 的含量可以改善材料的晶相组成,获得SrFe12 O19单相结构.Bi2 O3和PbO 的适当添加使材料的致密度提高到94％以上,利于材料饱和磁化强度Ms 和内禀矫顽力H cj的增加.当 Bi2 O3的添加量为3％(质量分数)时,材料的电学特性和磁性能都较优,直流电阻率ρ为0．42×108Ω?cm,Ms 和 Hcj分别达到60．7 A?m2/kg和347．2 kA/m,在微波LTCC环行器等领域具有潜在的应用价值.
For use in microwave low temperature co-fired ceramics (LTCC)technology,the hexagonal M-type strontium ferrites (SrFe12O19)with additives of Bi2O3,B2O3,CuO,MoO3,PbO,and Al2O3?2SiO2?2H2O as sintering aids were prepared by solid phase method in this paper.The results show that the additives provide a significant effect on the crystal structure,compactness,direct-current resistivity,and static magnetic proper-ties for the ferrites.The crystal phase composition can be improved by adjusting the amount of Bi2 O3 ,CuO, and PbO and the SrFe12 O19 single phase structure is successfully obtained.Appropriate addition of Bi2 O3 and PbO separately increases the compactness to a value higher than 94%,which is beneficial to enhance the satura-tion magnetization Ms and intrinsic coercivity H cj .It is suggested that the SrFe12 O19 ferrites sintered with 3wt%Bi2 O3 can provide good electrical properties with direct-current resistivityρof 0.42×108Ω?cm and large mag-netic properties with Ms of 60.7 A?m2/kg and Hcj of 347.2 kA/m,which possess a potentiality for applying in microwave LTCC circulators.
参考文献
| [1] | Zhou, C.X.;Guo, Y.X.;Yan, S.L.;Wang, Z.L..Dual-band UWB filter with LTCC technology[J].Electronics Letters,201122(22):1230-1232. |
| [2] | Yuan-xun Li;Ying-li Liu;Huai-wu Zhang;Li-kun Han.The sintering properties and interfacial investigation of barium ferrite and ceramic cofiring system for the application of LTCC technology[J].Journal of Applied Physics,20097(7):07A745-1-07A745-3-0. |
| [3] | Jensen, T.,Krozer, V.,Kjaergaard, C..Realisation of microstrip junction circulator using LTCC technology[J].Electronics Letters,20112(2):111-113. |
| [4] | R. Karmazin;O. Dernovsek;N. Ilkov.New LTCC-hexaferrites by using reaction bonded glass ceramics[J].Journal of the European Ceramic Society,200512(12):2029-2032. |
| [5] | Jean-Pierre Ganne;Richard Lebourgeois;Michel Pate.The electromagnetic properties of Cu-substituted garnets with low sintering temperature[J].Journal of the European Ceramic Society,20078/9(8/9):2771-2777. |
| [6] | Chen, D.;Liu, Y.;Li, Y.;Zhong, W.;Zhang, H..Low-temperature sintering of M-type barium ferrite with BaCu(B _2O_5) additive[J].Journal of Magnetism and Magnetic Materials,20124(4):449-452. |
| [7] | Adil Bahadoor;Yong Wang;Mohammed N. Afsar.Complex permittivity and permeability of barium and strontium ferrite powders in X, KU, and K-band frequency ranges[J].Journal of Applied Physics,200510(10):10F105-1-10F105-3-0. |
| [8] | Wang Zhanyong;Zhong Liuming;Lv Jieli;Qian Huichun;Zheng Yuli;Fang Yongzheng;Jin Minglin;Xu Jiayue.Microwave-assisted synthesis of SrFe_(12)O_(19) hexaferrites[J].Journal of Magnetism and Magnetic Materials,201018(18):2782-2785. |
| [9] | PENG Long;HU Yue-Bin;GUO Cheng;LI Le-Zhong;WANG Rui;HU Yun;TU Xiao-Qiang.Preparation and Magnetic Properties of SrFe12O19 Ferrites Suitable for Use in Self-Biased LTCC Circulators[J].中国物理快报（英文版）,2015(1):150-153. |
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