Preparation of BaSm2Ti4O12 Microwave Dielectric Ceramics via a Polyacrylamide Precursor


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A modified polyacrylamide precursor method is presented to synthesize BaSm2Ti4O12 microwave dielectric ceramics. Under an alkaline circumstance, all the cations together with the monomer and bridging agent were dispersed into a hydrous solution with the aid of chelating agent EDTA. This mixture was initiated at about 90°C, dried, calcined at 1000°C for 2hs and finally turned into well-crystallized and single-phased BaSm2Ti4O12 ceramic powder, which was modeled and sintered at 1250°C for 2hours into well-sintered ceramics. Differential thermal analysis, thermogravimetric analysis, X-ray powder diffraction and transmission electron microscope were used to characterize the process. Microwave dielectric properties measured by a resonating cavity method contain a dielectric constant (εr) about 77.0 and quality factor (Q×f) lager than 11000.



Key Engineering Materials (Volumes 336-338)

Edited by:

Wei Pan and Jianghong Gong




X. L. Huang et al., "Preparation of BaSm2Ti4O12 Microwave Dielectric Ceramics via a Polyacrylamide Precursor", Key Engineering Materials, Vols. 336-338, pp. 252-254, 2007

Online since:

April 2007




[1] R.L. Bolton: PhD Thesis, University of Illinois, Urbana, IL, (1968).

[2] D. Kolar, Z.S. Gaberscek, D. Suvorov: Ber. Dt. Keram. Ges. Vol. 55 (1978), p.346.

[3] D. Kolar, Z.S. Gaberscek, S.B. Volavsek, et al.: J. Solid State Chem. Vol. 38 (1981), p.58.

[4] S. Kawashima and M. Nishida: 87 th Annual Meeting, Am. Ceram. Soc. (1985).

[5] J. H. Choy, Y.S. Han, J. Ho Sohn, and M. Itoh: J. Am. Ceram. Soc. Vol. 58 (1995), p.1169.

[6] J .H. Choy, Y.S. Han: J. Am. Ceram. Soc. Vol. 61 (1998), p.3197.

[7] J.H. Choy, Y.S. Han: J. Mater. Chem. Vol. 5 (1995), p.57.

[8] M.H. Weng, T.J. Liang, C.L. Huang: J. Euro. Ceram. Soc. Vol. 22 (2002), p.1693.

[9] X. Yebin, C. Xiangming and W. Yongjun: J. Am. Ceram. Soc. Vol. 83 (2000), p.2893.

[10] T.R. Kutty, P. Murugaraj: J. Mater. Sci. Lett. Vol. 7 (1988), p.601.

[11] T.R.N. Kutty, D. Dadmini: J. Mater. Sci. Lett. Vol. 15 (1996), pp. (1973).

[12] J.J. Ritter, R.S. Roth and J.E. Blendell: J. Am. Ceram. Soc. Vol. 59 (1986), p.155.

[13] F. Wang, W. Li, Z. Jiang and S. Ying: J. Sol-gel Sci. Tech. Vol. 23 (2002), p.39.

[14] G. Pfaff: J. Mater. Sci. Lett. Vol. 10 (1991), p.129.

[15] K. Keiichi and A. Yasuo: J. Mater. Sci. Vol. 34 (1999), p.301.

[16] X. Yebin, Y. He: Ceram. Intern. Vol. 28(2002), p.75.

[17] A. Douy: Intel. J. Inorg. Mater. Vol. 3 (2001), p.699.