Effect of MnCO3 on Eliminating Al2TiO5 Phase and Dielectric Properties of 0.90Al2O3-0.10TiO2 Composite Ceramics

被引:2
作者
Lu, Xiaochi [1 ,2 ]
Bian, Wenjie [1 ,2 ]
Li, Yaoyao [1 ,2 ]
Fu, Zhenxiao [3 ]
Wang, Zhefei [2 ,4 ]
Zhu, Haikui [1 ,2 ]
Zhang, Qitu [1 ,2 ]
机构
[1] Nanjing Tech Univ, Coll Mat Sci & Engn, Nanjing 210009, Jiangsu, Peoples R China
[2] Jiangsu Collaborat Innovat Ctr Adv Inorgan Funct, Nanjing 210009, Jiangsu, Peoples R China
[3] Fenghua Adv Technol Holding Co Ltd, Zhaoqing 526000, Peoples R China
[4] Changshu Inst Technol, Coll Chem & Mat Engn, Changshu 215500, Peoples R China
关键词
Microwave dielectric ceramics; millimeter-wave applications; high Q x f; low epsilon(r); zero tau(f); Al2O3-TiO2; MICROWAVE APPLICATIONS; SINTERED ALUMINA; ALPHA-ALUMINA; DENSIFICATION; RESONATORS; BEHAVIOR; SYSTEM; TIO2; ZNO;
D O I
10.1007/s11664-017-5470-4
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
The 0.90Al(2)O(3)-0.10TiO(2) ceramics have been prepared by the conventional solid-state method. MnCO3 was added into the ceramic system for the purpose of eliminating Al2TiO5 and improving the microwave dielectric performance. For the samples of MnCO3 addition, once the sintering temperature was over 1200A degrees C, the Al2TiO5 phase was suppressed without annealing treatment. In combination with scanning electron microscope (SEM) micrographs, the optimized sintering temperature for the ceramics system was 1250A degrees C. The grain size increased with the increasing of MnCO3 addition, accompanied with the abnormal grain growth. Moreover, the energy dispersive spectrometer (EDS) data illustrate that the Mn element exists at the grain boundary. The compact uniform microstructure and excellent microwave dielectric performance were obtained in the samples of 0.90Al(2)O(3)-0.10TiO(2) with 0.3 mol.% MnCO3 sintered at 1250A degrees C for 4 h: epsilon (r) = 12.6, Q x f = 125500 GHz, tau (f) = -1.4 ppm/A degrees C.
引用
收藏
页码:4924 / 4930
页数:7
相关论文
共 28 条
  • [1] Sintered alumina with low dielectric loss
    Alford, NM
    Penn, SJ
    [J]. JOURNAL OF APPLIED PHYSICS, 1996, 80 (10) : 5895 - 5898
  • [2] A Study of the Dielectric Properties of Al2O3-TiO2 Composite in the Microwave and RF Regions
    Campos, R. V. B.
    Bezerra, C. L.
    Oliveira, L. N. L.
    Gouveia, D. X.
    Silva, M. A. S.
    Sombra, A. S. B.
    [J]. JOURNAL OF ELECTRONIC MATERIALS, 2015, 44 (11) : 4220 - 4226
  • [3] Dielectric materials for applications in microwave communications
    Cava, RJ
    [J]. JOURNAL OF MATERIALS CHEMISTRY, 2001, 11 (01) : 54 - 62
  • [5] Dielectric resonators with complex crystal structures in the La2O3-Al2O3-TiO2 system for microwave applications
    Dhanya, J.
    Unnimaya, A. N.
    Ratheesh, R.
    [J]. JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, 2014, 25 (10) : 4617 - 4622
  • [6] The effect of TiO2 and MnO2 on densification and microstructural development of alumina
    Erkalfa, H
    Misirli, Z
    Baykara, T
    [J]. CERAMICS INTERNATIONAL, 1998, 24 (02) : 81 - 90
  • [7] Hakki BW., 1960, IEEE. Trans. MTT, DOI DOI 10.1109/TMTT.1960.1124749
  • [8] Microstructure and microwave dielectric properties of Ba4.2Nd9.2Ti18-xSnxO54(x=0, 0.25, 0.5, 1, 1.5, 2) ceramics
    Huang, Baoyu
    Wang, Zhefei
    Chen, Tao
    Wang, Lixi
    Fu, Zhenxiao
    Zhang, Qitu
    [J]. JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, 2015, 26 (05) : 3375 - 3379
  • [9] Microwave dielectric properties of sintered alumina using nano-scaled powders of α alumina and TiO2
    Huang, Cheng-Liang
    Wang, Jun-Jie
    Huang, Chi-Yuen
    [J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2007, 90 (05) : 1487 - 1493
  • [10] Sintering behavior and microwave dielectric properties of nano alpha-alumina
    Huang, CL
    Wang, JJ
    Huang, CY
    [J]. MATERIALS LETTERS, 2005, 59 (28) : 3746 - 3749