MgO/Eu2O3共掺杂对Al2O3陶瓷微波介电性能的影响

doi:10.15541/jim20150081

摘要/Abstract

摘要：

利用湿化学法制备了MgO/Eu₂O₃共掺Al₂O₃陶瓷, 研究了不同的MgO/Eu₂O₃掺杂量对Al₂O₃陶瓷物相组成、显微结构和微波介电性能的影响。结果表明: 适量的MgO/Eu₂O₃共掺有助于Al₂O₃的致密化和晶粒生长。在介电性能方面, MgO/Eu₂O₃共掺对Al₂O₃陶瓷的介电常数没有明显的影响, 但对介电损耗的影响显著。随着Eu₂O₃含量的增加, Al₂O₃陶瓷的Q×f值会呈现先增加后下降的变化趋势。0.05wt% MgO/0.10wt% Eu₂O₃共掺的样品在1590℃下保温4 h获得的微波介电性能最佳, ε_r~9.82, Q×f ~225, 225 GHz。Q×f值的这种变化可能与样品微观结构的变化相关。先是随着MgO/Eu₂O₃共掺量的增加, 晶粒尺寸不断增加, 晶界不断减少, 这有利于Q×f值的提高; 接着, 当MgO/Eu₂O₃共掺量进一步增加时, 晶粒尺寸不断下降, 晶界增多, 这会导致样品Q×f值的降低。另外, 应力和第二相也可能对Q×f值的变化产生影响。

关键词: 氧化铝, MgO/Eu2O3共掺, 微波介电性能

Abstract:

Al₂O₃ ceramics co-doped with MgO/Eu₂O₃ were prepared by wet chemical process. The effects of the content of MgO/Eu₂O₃ co-doping on phase composition, microstructure and microwave dielectric properties of Al₂O₃ ceramics were explored. The experimental results show that suitable contents of MgO/Eu₂O₃ can promote densification and grain growth of Al₂O₃. As to the dielectric properties, the influence of MgO/Eu₂O₃ co-doping on the dielectric constant can be ignored. However, it has a significant impact on the dielectric loss. The Q×f value increases initially and then decreases as the Eu₂O₃ content increases. Optimized microwave dielectric properties with ε_r~9.82, Q×f ~225,225 GHz. can be attained for the samples co-doped with 0.05wt% MgO/0.10wt% Eu₂O₃ sintered at 1590℃ for 4 h This change of Q×f value may relate to the change of sample’s microstructure. Firstly, when the content of MgO/Eu₂O₃ increases, the grain size increases and the grain boundary decreases, which is beneficial to increase the Q×f value. Then, as the content of MgO/Eu₂O₃ keeps increase, the grain size decreases and the grain boundary increases, which may lead to decrease Q×f value. In addition, the presence of strain and second phase may also influence the change of Q×f value.

Key words: alumina, MgO/Eu2O3 co-doping, microwave dielectric properties

中图分类号:

TQ174

张康, 李蔚, 林慧兴. MgO/Eu₂O₃共掺杂对Al₂O₃陶瓷微波介电性能的影响[J]. 无机材料学报, 2015, 30(9): 984-988.

ZHANG Kang, LI Wei, LIN Hui-Xin. Effect of MgO/ Eu₂O₃ Co-doping on the Microwave Dielectric Properties of Al₂O₃ Ceramics[J]. Journal of Inorganic Materials, 2015, 30(9): 984-988.

图/表 4

图1 0.05wt% MgO和不同含量Eu2O3共掺的Al2O3陶瓷的相对密度

Fig. 1 Relative densities of Al2O3 ceramics co-doped with 0.05wt% MgO and different amounts of Eu2O3

图2 0.05wt% MgO和不同含量Eu2O3共掺Al2O3陶瓷的XRD图谱

Fig. 2 XRD patterns of Al2O3 ceramics co-doped with 0.05wt% MgO and different Eu2O3 contents (a) 0.03wt%; (b) 0.05wt%; (c) 0.10wt%; (d) 0.15wt%; (e) 0.20wt% Eu2O3

图3 (a~e)不同Eu2O3掺杂量样品的扫描电镜照片和(f)晶粒的平均尺寸

Fig. 3 SEM images of the samples doped with different Eu2O3 contents (a-e) and the curve of average grain sizes (f)

图4 不同MgO/Eu2O3共掺样品的微波介电常数和Q×f值

Fig. 4 Dielectric constants and Q×f values of samples with different amounts of MgO/Eu2O3 co-doped

参考文献 19

[1]	WAN JALAL W N, ABDULLAH H, ZULFAKAR M S, et al. ZnAl2O4-based microwave dielectric ceramics as GPS patch antenna: a review.Transactions of the Indian Ceramic Society, 2013, 72(4): 215-224.
[2]	SHEN C H, LIN S H, PAN C L.Structure, dielectric properties, and applications of (Na0.5Sm0.5) TiO3-modified (Mg0.95Ni0.05)TiO3 ceramics at microwave frequency.Materials Research Bulletin, 2015, 65(1): 169-174
[3]	PENN S J, ALFORD N M N, TEMPLETON A, et al. Effect of porosity and grain size on the microwave dielectric properties of sintered alumina.Journal of the American Ceramic Society, 1997, 80(7): 1885-1888.
[4]	HUANG C L, WANG J J, HUANG C Y.Microwave dielectric properties of sintered alumina using nano-scaled powders of α alumina and TiO2.Journal of the American Ceramic Society, 2007,90(5): 1487-1493.
[5]	ALFORD N M N, PENN S J. Sintered alumina with low dielectric loss.Journal of Applied Physics, 1996, 80(10): 5895-5898.
[6]	MOLLÁ J, MORENO R, IBARRA A.Effect of Mg doping on dielectric properties of alumina. Journal of Applied Physics, 1996, 80(2): 1028-1032.
[7]	CHOVANEC J, GALUSEK D, RÁHEΜ J, et al. Low loss alumina dielectrics by aqueous tape casting: the influence of composition on the loss tangent.Ceramics International, 2012, 38(5): 3747-3755.
[8]	CHEN J M, WANG H P, FENG S Q, et al.Effects of CaSiO3 addition on sintering behavior and microwave dielectric properties of Al2O3 ceramics.Ceramics International, 2011, 37(3): 989-993.
[9]	SONG K X, WU S Y, CHEN X M.Effects of Y2O3 addition on microwave dielectric characteristics of Al2O3 ceramics.Materials Letters, 2007, 61(16): 3357-3360.
[10]	WANG H J, LI W, TERNSTRÖM C, et al. Effect of Mg doping on microwave dielectric properties of translucent polycrystalline alumina ceramic.Ceramics International, 2013, 39(2): 1583-1586.
[11]	WANG H J, LIN H X, LI W, et al.Effect of La doping on microwave dielectric properties of translucent polycrystalline alumina ceramic. Ceramics International, 2013, 39(5): 4907-4911.
[12]	YUAN L, WANG H J, LIN H X, et al.Effect of MgO/La2O3 co-doping on the microstructure, transmittance and microwave dielectric properties of translucent polycrystalline alumina.Ceramics International, 2014, 40(1): 2109-2113.
[13]	MENDELSON M I.Average grain size in polycrystalline ceramics. Journal of the American Ceramic Society, 1969, 52(8): 443-446.
[14]	HAKKI B W, COLEMAN P D.A dielectric resonator method of measuring inductive capacities in the millimeter range.Microwave Theory and Techniques, IRE Transactions on, 1960, 8(4): 402-410.
[15]	COURTNEY W E.Analysis and evaluation of a method of measuring the complex permittivity and permeability microwave insulators.Microwave Theory and Techniques, IEEE Transactions on, 1970, 18(8): 476-485.
[16]	BRULEY J, CHO J, CHAN H M, et al.Scanning transmission electron microscopy analysis of grain boundaries in creep-resistant yttrium-and lanthanum-doped alumina microstructures.Journal of the American Ceramic Society, 1999, 82(10): 2865-2870.
[17]	关振铎. 无机材料物理性能. 清华大学出版社, 1992: 333-334.
[18]	PANG L X, WANG H, ZHOU D, et al.Sintering behavior and microwave dielectric properties of Ba6- 3xNd 8+ 2xTi18O54 (x= 2/3) ceramics coated by H3BO3-TEOS Sol-Gel.Materials Chemistry and Physics, 2010, 123(2): 727-730.
[19]	SAYYADI-SHAHRAKI A, TAHERI-NASSAJ E, HASSANZADEH- TABRIZI S A, et al. Low temperature cofirable Li2Zn3Ti4O12 microwave dielectric ceramic with Li2O-ZnO-B2O3 glass additive. Journal of Materials Science: Materials in Electronics, 2014, 25(1): 355-360.

MgO/Eu₂O₃共掺杂对Al₂O₃陶瓷微波介电性能的影响

Effect of MgO/ Eu₂O₃ Co-doping on the Microwave Dielectric Properties of Al₂O₃ Ceramics

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