采用传统固相反应法制备Ba6-3x(La1-mBim)8+2x(Ti0.95Zr0.05)18O54(x=2/3)微波介质陶瓷,研究Bi掺杂对Ba6-3xLa8+2x(Ti0.95Zr0.05)18O54(x=2/3)陶瓷的烧结性能、微观结构以及介电性能的影响.结果表明:当0＜m＜0.4时,Bi3+取代A1位的La3+生成单相类钨青铜型固溶体;当Bi3+的掺杂量超过这个范围时,La0.176Bi0.824O1.5作为第二相出现在固溶体中;Bi3+的掺入使Ba6-3xLa8+2x(Ti0.95Zr0.05)18O54(x=2/3)陶瓷的烧结温度从1 400 ℃降低到1 300 ℃,同时,其介电常数大幅度提高,谐振频率温度系数减小,但品质因数急剧减小;当m=0.05时,1 350 ℃下保温2 h烧结获得的陶瓷具有微波介电性能,εr=88.63,Q·f=4 395 GHz,τf=6.25×10-6/℃.
参考文献
| [1] | Matjaz Valant;Danilo Suvorov;Claudia J. Rawn .Intrinsic Reasons for Variations in Dielectric Properties of Ba_(6-3x)R_(8+2x)Ti(18)O(54)(R = La-Gd) Solid Solutions[J].Japanese journal of applied physics,1999(5A Pt.1):2820-2826. |
| [2] | MATVEEVA R G;VARFOLOMEEV M B;LL'YUSCHENKO L S .Refinement of the composition and crystal structure of Ba3.75Pr9.5Ti18O54[J].Russian Journal of Inorganic Chemistry,1984,29:17-19. |
| [3] | CHEN X M;QIN N;LI Y .Microstructures and microwave dielectric characteristics of Ba6-3x(Sm1-yLay)8+2xTi18O54 solid solutions(x=2/3 and 0.75)[J].Journal of Electroceramics,2002,9:31-35. |
| [4] | 王美娜,高旭芳,丘泰.ZrO2添加对BaO-La2O3-TiO2介质陶瓷介电性能的影响[J].中国稀土学报,2008(02):153-157. |
| [5] | N. Qin;X.M. Chen .Effects of Sm/Bi co-substitution on microstructures and microwave dielectric characteristics ofBa_6-3x)La_(8+2x)Ti_18O_54 (x = 2/3) solid solution[J].Materials Science & Engineering, B. Solid-State Materials for Advanced Technology,2004(1):90-94. |
| [6] | Wu YJ.;Chen XM. .Bismuth/samarium cosubstituted Ba6-3xNd8+2xTi18O54 microwave dielectric ceramics[J].Journal of the American Ceramic Society,2000(7):1837-1839. |
| [7] | ICHINOSE N;AMADA H .Preparation and microwave dielectric properties of the BaO-(Sm1-xLax)2O3-5TiO2 ceramic system[J].Journal of the European Ceramic Society,2001,21:2751-2753. |
| [8] | AZOUGH F;LOWE T;FREER R .Control of microwave dielectric properties in the system BaO@Nd2O3@4TiO2-BaO@Al2O3@4TiO2[J].Journal of Electroceramics,2005,15:183-192. |
| [9] | Xiang Ming Chen;Yi Li .A- and B Site Cosubstituted Ba_(6-3x)Sm_(8+2x)Ti_(18)O_(54) Microwave Dielectric Ceramics[J].Journal of the American Ceramic Society,2002(3):579-584. |
| [10] | WU Y J;CHEN X M .Modified Ba6-xNd8+2xTi18O54 microwave dielectric ceramics[J].Journal of the European Ceramic Society,1999,19:1123-1126. |
| [11] | Y. Zheng;X. Zhao;W. Lei .Effects of Bi_2O_3 addition on the microstructures and microwave dielectric characteristics of Ba_(6-3x)(Sm_(0.2)Nd_(0.8))_(8+2x)Ti_(18)O_(54)(x=2/3) ceramics[J].Materials Letters,2006(4):459-463. |
| [12] | OKAWA T;IMAEDA M;OHSATO H .Microwave dielectric properties of Bi-added Ba4Nd9+1/3Ti18O54 solid solutions[J].Japanese Journal of Applied Physics,2000,39(9B):5645-5649. |
| [13] | SHANNON R D .Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides[J].Acta Crystallographica Section A:Foundations of Crystallography,1976,32:751. |
| [14] | OHSATO H .Science of tungsten bronze-type Ba6-3xR8+2xTi18O54(R=rare earth) microwave dielectric solid solutions[J].Journal of the European Ceramic Society,2001,21:2703-2711. |
| [15] | SHANNON R D .Dielectric polarizabilities of ions in oxides and fluorides[J].Journal of Applied Physics,1993,73(01):348-366. |
| [16] | TOSHIMI F;CHIHIRO S;MASAHIKD O .Preparation of Ba(Mg1/3Ta2/3)O3 ceramics as microwave dielectrics through alkoxide-hydroxide route[J].Journal of Materials Research,1992,7(07):1883-1887. |
| [17] | Okawa T.;Imaeda M.;Ohsato H.;Harada A. .Site occupancy of Bi ions and microwave dielectric properties in Bi-doped Ba6-3xR8+2xTi18O54 (R = rare earth, x=2/3) solid solutions[J].Materials Chemistry and Physics,2003(2/3):199-203. |
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