Abstract
The structure–property relationship of the CaCu3Ti4O12 ceramics processed via conventional solid-state method was studied in terms of the different processing conditions. X-ray diffraction patterns of the tenorite CuO and cuprite Cu2O secondary phases found on the unpolished and polished surfaces of CaCu3Ti4O12 were explained by the reduction/reoxidation reaction as a function of sintering time. Based on the microstructures, grain growth of CaCu3Ti4O12 continued from 0.5 to 4 h sintering while the further growth was limited to the small-sized grains after 8 h sintering. Also, WDS data indicated the Cu-deficient and Ti-excessive stoichiometry of CaCu3Ti4O12 on both outer and inner regions regardless of sintering time. The change of dielectric constant and tan δ were shortly discussed with regard to the secondary phases and the microstructures of the different sintering hours.
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References
Bhalla AS, Guo R, Roy R (2000) Mater Res Innov 4:3
Moulson AJ, Herbert JM (2003) Electroceramics, 2nd edn. Wiley, Chichester
Subramanian MA, Li D, Duan N, Reisner BA, Sleight AW (2000) J Solid State Chem 151:323
Bochu B, Deschizeaux MN, Joubert JC, Collomb A, Chenavas J, Marezio M (1979) J Solid State Chem 29:291
Ramirez AP, Subramanian MA, Gardel M, Blumberg G, Li D, Vogt T, Shapiro SM (2000) Solid State Commun 115:217
Homes CC, Vogt T, Shapiro SM, Wakimoto S, Ramirez AP (2001) Science 293:673
He L, Neaton JB, Cohen MH, Vanderbilt D, Homes CC (2002) Phys Rev B 65:214112
Lunkenheimer P, Bobnar V, Pronin AV, Ritus AI, Volkov AA, Loidl A (2002) Phys Rev B 66:052105
Adams TB, Sinclair DC, West AR (2002) Adv Mater 14(18):1321
Li J, Subramanian MA, Rosenfeld HD, Jones CY, Toby BH, Sleight AW (2004) Chem Mater 16:5223
Fang TT, Mei LT, Ho HF (2006) Acta Mater 54:2867
Fang TT, Mei LT (2007) J Am Ceram Soc 90:638
Shao SF, Zhang JL, Zheng P, Wang CL (2007) Solid State Commun 142:28
Shri Prakash B, Varma KBR (2007) J Mater Sci 42:7467. doi:10.1007/s10853-006-1251-9
Ni WQ, Zheng XH, Yu JC (2007) J Mater Sci 42:1037. doi:10.1007/s10853-006-1431-7
Almeida AFL, Fechine PBA, Kretly LC, Sombra ASB (2006) J Mater Sci 41:4623. doi:10.1007/s10853-006-0052-5
Kwon S, Cann DP (in press) J Electroceram. doi:10.1007/s10832-009-9563-1
Kwon S, Triamnak N, Cann DP (2008) In: Proceedings of the 17th international symposium on applications of ferroelectrics, Santa Fe, NM
Aygün S, Tan X, Maria JP, Cann DP (2005) J Electroceram 15:203
Kwon S, Huang CC, Patterson EA, Alberta EF, Kwon ST, Hackenberger WS, Cann DP (2008) Mater Lett 62:633
Acknowledgements
This work was supported by the Office of Naval Research Capacitor Program and the American Chemical Society’s Petroleum Research Foundation. Also, authors are thankful to Dr. Frank J. Tepley III at Oregon State University for his support from the electron microprobe analysis.
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Kwon, S., Cann, D.P. Relationship among the phase equilibria, microstructures, and dielectric properties of CaCu3Ti4O12 ceramics via different sintering time. J Mater Sci 44, 4117–4123 (2009). https://doi.org/10.1007/s10853-009-3597-2
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DOI: https://doi.org/10.1007/s10853-009-3597-2