| RESEARCH PAPER |
|
|
|
|
|
| Effect of SnO2 Doping on the Structure and Dielectric Properties of BMN Ceramics |
| PENG Sen1,2, WU Mengqiang2, HUANG Tongcheng1, XU Jianming1, ZHOU Jianhua1, LUO Gaofeng1, YU Jiankun1, ZHANG Shuren2
|
1 Department of Information Engineering, Shaoyang University, Shaoyang 422000;
2 School of Energy Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731 |
|
|
|
|
Abstract The structure and microwave dielectric properties of Ba(Mg1/3Nb2/3)O3 (BMN) ceramics doped with x(x=0-8)wt% SnO2 (BMSN) were investigated by the solid-state reaction technique. XRD analysis suggested there were two phases: main crystalline phase Ba(Mg1/3Nb2/3)O3 and secondary phase Ba5Nb4O15. As x value increased, the crystal structure changed from pe-rovskite hexagonal structure to cubic structure and the ordered phase changed from 1∶2 ordered structure to 1∶1 ordered structure. It was found that the liquid phase sintering can be promoted greatly by adding an appropriate amount of SnO2. When 6wt% SnO2 was added, the BMN ceramic showed a lower sintering temperature (1 550 ℃) compared to pure BMN (1 200 ℃), an apparent density ρ of 6.39 g/cm3, a relative theoretical density of 99.1%, also excellent microwave dielectric properties: high relative dielectric constant(εr= 33.6), near-zero temperature coefficient of resonant frequency value τf=0.15×10-6℃-1, high quality factor plus resonant frequency (Q·f=112 300 GHz (8 GHz)).
|
|
Published: 08 May 2018
|
|
|
|
|
1 Ma P P, Yi L, Liu X Q, et al. Effects of post-densification annealing upon microstructures and microwave dielectric characteristics in Ba((Co0.6-x/2Zn0.4-x/2Mgx)1/3Nb2/3)O3 ceramics[J]. J Am Ceram Soc,2013,96(11):3417.
2 Yue Z X, Shi F, et al. Far-infrared reflection study on crystal structures and dielectric properties of Ba(Mg1/3Ta2/3)O3-BaWO4 ceramics[J]. J Mater Sci: Mater Electron,2014,26(2):711.
3 Shi F, Dong H L. Correlation of phonon characteristics and crystal structures of Ba[Zn1/3(Nb1-xTax)2/3]O3 solid solutions[J]. J Appl Phys,2012,111(1):014111.
4 Yang Baoju, Yin Yansheng, Zhang Weike,et al. Determination of TiAl/B4C composite ceramic sintering process parameters [J]. J Chongqing Inst Technol: Nat Sci Ed,2009,23(4):142(in Chinese).
杨宝菊, 尹衍升, 张卫珂, 等. TiAl/B4C复合陶瓷烧结工艺参数的确定[J]. 重庆工学院学报: 自然科学版,2009,23(4):142.
5 Nomura S. Ceramics for microwave dielectric resonators [J]. Ferroelectrics,1983,49(1-4):61.
6 Chen F L, Hong H L, et al. Microstructural characteristics and microwave dielectric properties of Ba[Mg1/3(Nbx/4Ta(4-x)/4)2/3]O3 ceramics[J]. J Alloy Compd,2006,407(1-2):318.
7 Liu H X, Tian Z Q. New microwave dielectric ceramics with near-zero τf in the Ba(Mg1/3Nb2/3)O3-Ba(Ni1/3Nb2/3)O3 system[J]. J Mater Sci,2004,39(13):4319.
8 Shan L,Pan W. Effect of V2O5 addition on the microwave dielectric properties of Ba(Mg1/3Nb2/3)O3 ceramics[J]. Key Eng Mater,2007,336(2):301.
9 Lim J B, Kim D H, et al. Effect of B2O3 and CuO additives on the sintering temperature and microwave dielectric properties of Ba(Mg1/3Nb2/3)O3 ceramics[J]. Mater Res Bull,2006,41(6):1199.
10 Kim Y W, Park J H, Park J G. Local cationic ordering behavior in Ba(Mg1/3Nb2/3)O3 ceramic[J]. J Eur Ceram Soc,2004,24(6):1775.
11 Tang B, Fang Z X, Li Y X, et al.Microwave dielectric properties of Ba(Co0.56Y0.04Zn0.35)1/3Nb2/3+xO3(x =-0.004~0.008) ceramics[J]. J Mater Sci: Mater Electron,2015,26(9):6585.
12 Sun T L, Chen X M. Raman spectra analysis for Ba[(Mg1-xNix)1/3-Nb2/3]O3 microwave dielectric ceramics[J]. AIP Adv,2015,5(1):3.
13 Desu S B, O′Bryan H M. Microwave loss quality of BZT ceramics[J]. J Am Ceram Soc,1985,68(10):546.
14 Ning P F, Li L X, et al. Raman scattering, electronic structure and microwave dielectric properties of Ba([Mg1-xZnx]1/3Ta2/3)O3 ceramics[J]. Ceram Int,2012,38(2):1391.
15 Zhang H, Diao H L, et al. XRD and Raman study on crystal structures and dielectric properties of Ba[Mg(1-x)/3ZrxNb2(1-x)/3]O3 so-lid solutions[J]. Ceram Int,2014,40(1):2427
16 Colla E L, Reaney I M, Setter N. Effect of structural changes in complex perovskites on the temperature coefficient of the relative permittivity[J]. J Appl Phys,1993,74(5):3414.
17 Lim J B, Son J, Nahm S,et al. Low-temperature sintering of B2O3-added Ba(Mg1/3Nb2/3)O3 ceramics[J]. Jpn J Appl Phys,2004,43(8R):5388.
18 Wang Dongmei, Mao Hong, Wu Mengqiang,et al. Effect of Ca-B-Si glass doping on the microwave dielectric properties of Ba(Mg1/3-Nb2/3)O3[J].Ceram Electron Components Mater,2010,29(1):22(in Chinese).
王冬梅,毛宏,吴孟强,等. Ca-B-Si掺杂对 Ba(Mg1/3Nb2/3)O3陶瓷介电性能的影响[J]. 电子元件与材料,2010,29(1):22.
19 Sun T L, Li L, Mao M M, et al. Effects of postdensification annealing on microwave dielectric properties of Ba([Mg1-xCox]1/3Nb2/3)-O3 ceramics[J]. Int J Appl Ceram Technol,2013,10(S1):E210. |
|
|
|
渝公网安备50019002502923号 © Editorial Office of Materials Reports.
2017, Vol. 31 
