Preparation and Dielectric Properties of BaO-Sm₂O₃-4TiO₂ Microwave Ceramics with B₂O₃ and CuO Addition Sintered in Low Temperature

Abstract:

BaCu(B2O5) (BCB) powder was prepared using BaO,CuO and B2O3 as the main materials. Microwave dielectric ceramics of tungsten–bronze-type BaSm2Ti4O12 (BST) were prepared by doping BCB as the sintering aid. The amount of BCB was varied from 1.0 to 10.0wt.%. The microstructure and dielectric properties of BST were investigated. The sintering temperature of BST ceramics with 6.0wt.% BCB addition can be effectively reduced to 900 oC, about 450 oC lower than that of pure BST ceramics. Good microwave dielectric properties of εr = 62.38, Q×f = 4573 GHz and τf = -27.65 ppm/ oC were achieved.

• Periodical: Key Engineering Materials (Volumes 368-372)
• Pages: 173-175
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.368-372.173
• Online since: February 2008
• Authors: Wei Liang Liu, Chun Bao Tang, Jun Tan, Du Song Mao, Jin Gang Tan
• Keywords: BaSm₂Ti₄O₁₂ Ceramics, Dielectric Property, Low Temperature Sintering

References

[1] S. Nishigaki, H. Kato, S. Yano and R. Kamimura: Am. Ceram. Soc. Bull. Vol. 66(1987), p.1405.

[2] J.P. Mercurio, M. Manier, B. Frit: Mater. Lett. Vol. 8.

[3] (1989), p.112.

[3] C.L. Huang, M.H. Weng and H.L. Chen: Chem. Phys. Vol. 71 (2001), p.17.

[4] C.L. Huang, C.L. Pan and S.J. Shium: Mater. Chem. Phys. Vol. 78 (2002), p.111.

[5] H. Ohsato, T. Ohhashi, et al.: Jpn. J. Appl. Phys. Vol. 34.

[1] (1995), p.187.

[6] C.F. Yang: Jpn. J. Appl. Phys. Vol. 39 [3A] (2000), p.1430.

[7] M. H. Kim, J. B. Lim, et al.: J. Am. Ceram. Soc. Vol. 89.

[10] p.3124.

[8] J.B. Lim, M. H. Kim, et al.: Jpn. J. Appl. Phys. Vol. 45, p.212.

[9] B.W. Hakki and P.D. Coleman: IEEE Trans. Microwave Theory Tech. Vol. 8 p.402.