Effects of CuO on the Preparation, Microstructure and Dielectric Response of CaCu3Ti4O12


Article Preview

CaCu3Ti4O12 (CCTO) barrier layer ceramic capacitor was prepared by a two-step sintering process. The CCTO powders were pre-synthesized at 900oC by solid-state reaction and the effects of the amount of CuO on the formation of the CCTO powders were investigated. The CCTO ceramics were prepared by the second-step sintering. It was found that the abnormal grain growth and inhomogeneous microstructure are controlled by the amount of excessive CuO. The optimized CuO content in the composites is ~14 wt%. The maximum permittivity is 115,000 (1 kHz, 210oC).



Key Engineering Materials (Volumes 368-372)

Edited by:

Wei Pan and Jianghong Gong




J. F. Qiao et al., "Effects of CuO on the Preparation, Microstructure and Dielectric Response of CaCu3Ti4O12", Key Engineering Materials, Vols. 368-372, pp. 121-122, 2008

Online since:

February 2008




[1] M.A. Subramanian, D. Li, N. Duan, B.A. Reisner, et al.: J. Solid State Chem. Vol. 151 (2000), p.323.

[2] A.P. Ramirez, M.A. Subramanian, M. Gardel, et al.: Solid State Commun. Vol. 115 (2000), p.323.

[3] B. Shri Prakash and K.B.R. Varma: Physical B Vol. 382 (2006), p.312.

[4] Y.J. Kim, S. Wakimoto, S.M. Shapiro, et al.: Solid State commun. Vol. 121 (2002), p.625.

[5] L. Fang and M.R. Shen: Thin Solid Films Vol. 440 (2003), p.60.

[6] S.K. Manik and S. K. Pradhan: Physical E Vol. 33 (2006), p.160.

[7] D. Capsoni, M. Bini, V. Massarotti, et al.: J. Solid State Chem. Vol. 177 (2004), p.4494.

[8] T.T. Fang, L.T. Mei and H.F. Ho: Acta Materiatia Vol. 54 (2006), p.2867.

[9] B.A. Bender and M. J Pan: Materials Science and Engineering B Vol. 117 (2005), p.339.

[10] C.F. Yang: Jpn. J. Appl. Phys. Vol. 35 (1996), p.1806.

[11] S. Guillemet-Fritsch, T. Lebey, M. Boulos, et al.: J. Europ. Ceram. Soc. Vol. 26 (2006), p.1245. Fig. 3. The curves of relative permittivity vs temperature (1 kHz).