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Microwave dielectric properties of low loss and highly tunable Ba0.5Sr0.5Ti1−3y/2WyO3 ceramics

Published online by Cambridge University Press:  12 January 2012

Mingwei Zhang
Affiliation:
Functional Materials Research Laboratory, Tongji University, Shanghai 200092, China
Jiwei Zhai*
Affiliation:
Functional Materials Research Laboratory, Tongji University, Shanghai 200092, China
Bo Shen
Affiliation:
Functional Materials Research Laboratory, Tongji University, Shanghai 200092, China
Xi Yao
Affiliation:
Functional Materials Research Laboratory, Tongji University, Shanghai 200092, China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

This article reports on microstructure and dielectric properties of Ba0.5Sr0.5Ti1−3y/2WyO3 ceramics. Dielectric peaks of the Ba0.5Sr0.5Ti1−3y/2WyO3 ceramics were markedly suppressed, broadened, and shifted to low temperature with increasing content of W. The limit of W incorporating into the barium strontium titanate (BST) lattice was y = 0.02. Two second phases (BaWO4 and Ba2Ti5O12) were formed above the solid solution limit of W in BST. The doping mechanism represents a new approach to develop microwave tunable materials. Dielectric properties of the Ba0.5Sr0.5Ti1−3y/2WyO3 ceramics could be optimized by the content of W. The sample with y = 0.05 had ε′ of 431, quality factor of 365 (at 2.111 GHz), and tunability of 11.5%, which makes a potential candidate for tunable microwave device applications in the wireless communication.

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Articles
Copyright
Copyright © Materials Research Society 2012

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References

REFERENCES

1.Fiedziuszko, S.J., Hunter, I.C., Itoh, T., Kobayashi, Y., Nishikawa, T., Stitzer, S.N., and Wakino, K.: Dielectric materials, devices and circuits. IEEE Trans. Microwave Theory Tech. 50, 706 (2002).CrossRefGoogle Scholar
2.Tagantsev, A.K., Sherman, V.O., Astafiev, K.F., Venkatesh, J., and Setter, N.: Ferroelectric materials for microwave tunable applications. J. Electroceram. 11, 5 (2003).Google Scholar
3.Feteira, A., Sinclair, D.C., Reaney, I.M., Somiya, Y., and Lanagan, M.T.: BaTiO3-based ceramics for tunable microwave applications. J. Am. Ceram. Soc. 87(6), 1082 (2004).CrossRefGoogle Scholar
4.Irvin, P., Levy, J., Guo, R., and Bhalla, A.: Three-dimensional polarization imaging of (Ba,Sr)TiO3:MgO composite. Appl. Phys. Lett. 86(4), 042903 (2005).Google Scholar
5.Xiang, F., Wang, H., Li, K.C., Chen, Y.H., Zhang, M.H., Shen, Z.Y., and Yao, X.: Dielectric tunability of Ba0.6Sr0.4TiO3/poly(methyl methocrylate) composites in 1-3-type structure. Appl. Phys. Lett. 91(19), 192907 (2007).CrossRefGoogle Scholar
6.Zhou, K., Boggs, S.A., Ramprasad, R., Aindow, M., Erkey, C., and Alpay, S.P.: Dielectric response and tunability of a dielectric-paraelectric composite. Appl. Phys. Lett. 93(10), 102908 (2008).CrossRefGoogle Scholar
7.Zhang, J.J., Zhai, J.W., Zhang, M.W., Qi, P., Yu, X., and Yao, X.: Structure–dielectric properties relationship in Mg–Mn co-doped Ba0.4Sr0.6TiO3/MgAl2O4 tunable microwave composite ceramics. J. Phys. D: Appl. Phys. 42(7), 075414 (2009).CrossRefGoogle Scholar
8.Chung, U.C., Elissalde, C., Maglione, M., Estournes, C., Pate, M., and Ganne, J.P.: Low-losses, highly tunable Ba0.6Sr0.4TiO3/MgO composite. Appl. Phys. Lett. 92(4), 042902 (2008).Google Scholar
9.Chang, W. and Sengupta, L.: MgO-mixed Ba0.6Sr0.4TiO3 bulk ceramics and thin films for tunable microwave applications. J. Appl. Phys. 92(7), 3941 (2002).CrossRefGoogle Scholar
10.Wang, X.H., Lu, W.Z., Liu, J., Zhou, Y.L., and Zhou, D.X.: Effects of La2O3 additions on properties of Ba0.6Sr0.4TiO3-MgO ceramics for phase shifter applications. J. Eur. Ceram. Soc. 26(10–11), 1981 (2006).CrossRefGoogle Scholar
11.Varma, M.R. and Sebastian, M.T.: Effect of dopants on microwave dielectric properties of Ba(Zn1/3Nb2/3)O3 ceramics. J. Eur. Ceram. Soc. 27, 2827 (2007).CrossRefGoogle Scholar
12.Wu, Y., Limmer, S.J., Chou, T.P., and Nguyen, C.: Influence of tungsten doping on dielectric properties of strontium bismuth niobate ferroelectric ceramics. J. Mater. Sci. Lett. 21, 947 (2002).CrossRefGoogle Scholar
13.Zong, X., Yang, Z., Li, H., and Yuan, M.: Effects of WO3 addition on the structure and electrical properties of Pb3O4 modified PZT-PFW-PMN piezoelectric ceramics. Mater. Res. Bull. 41, 1447 (2006).CrossRefGoogle Scholar
14.Coondoo, I., Jha, A.K., Aggarwal, S.K., and Soni, N.C.: Enhancement of dielectric characteristics in donor doped Aurivillius SrBi2Ta2O9 ferroelectric ceramics. J. Eur. Ceram. Soc. 27, 253 (2007).CrossRefGoogle Scholar
15.Devi, S. and Jha, A.K.: Phase transitions and electrical characteristics of tungsten substituted barium titanate. Phys. B 404, 4290 (2009).CrossRefGoogle Scholar
16.Liang, C.S. and Wu, J.M.: Electrical properties of W-doped (Ba0.5Sr0.5)TiO3 thin films. J. Cryst. Growth 173, 274 (2005).Google Scholar
17.Zhang, J.J., Zhai, J.W., and Yao, X.: Dielectric tunable properties of low-loss Ba0.4Sr0.6Ti1-yMnyO3 ceramics. Scr. Mater. 61, 764 (2009).CrossRefGoogle Scholar
18.Yang, K., Gao, Z.F., and Bian, J.J.: Microwave dielectric properties of tungstate ceramics. J. China Ceram. Soc. 34, 251 (2006).Google Scholar
19.Hakki, B.W. and Coleman, P.D.: A dielectric resonator method of measuring inductive capacities in the millimeter range. IEEE Trans. Microwave Theory Tech. 8, 402 (1960).Google Scholar
20.Shannon, R.D.: Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides. Acta Crystallogr. A 32, 751 (1976).Google Scholar
21.Chan, H.M., Harmer, M.P., and Smyth, D.M.: Compensating defects in highly donor doped BaTiO3. J. Am. Ceram. Soc. 69, 507 (1986).Google Scholar
22.Chiang, Y.M., Birnie, D.P., and Kingery, W.D.: Physical Ceramics (John Wiley and Sons, New York, 1997).Google Scholar
23.Xiang, P.H., Dong, X.L., Feng, C.D., Zhong, N., and Guo, J.K.: Sintering behavior, mechanical and electrical properties of lead zirconate titanate/NiO composites from coated powders. Ceram. Int. 30, 765 (2004).Google Scholar
24.Chen, Y., Dong, X.L., Liang, R.H., Li, J.T., and Wang, Y.L.: Dielectric properties of Ba0.6Sr0.4TiO3/Mg2SiO4/MgO composite ceramics. J. Appl. Phys. 98(6), 064107 (2005).Google Scholar
25.Yu, H. and Ye, Z.G.: Dielectric properties and relaxor behavior of a new (1−x)BaTiO3xBiAlO3 solid solution. J. Appl. Phys. 103, 034114 (2008).CrossRefGoogle Scholar
26.Li, Z.C., Zhang, H., Zou, X.D., and Bergman, B.: Synthesis of Sm-doped BaTiO3 ceramics and characterization of a secondary phase. Mater. Sci. Eng., B 116, 34 (2005).CrossRefGoogle Scholar
27.Zhang, J.J., Zhai, J.W., Jiang, H.T., and Yao, X.: Raman and dielectric study of Ba0.4Sr0.6TiO3-MgAl2O4 tunable microwave composite. J. Appl. Phys. 104, 084102 (2008).Google Scholar
28.Kong, L.B., Li, S., Zhang, T.S., Zhai, J.W., Boey, F.Y.C., and Ma, J.: Electrically tunable dielectric materials and strategies to improve their performances. Prog. Mater. Sci. 55, 840 (2010).Google Scholar