Abstract
The Ba2+ doped ceramics of Ca1−xBaxCu3Ti4O12 (x = 0.005, 0.01, 0.03, 0.05 and 0.1) were sintered via conventional solid-state reaction at 1050 °C for 8 h in air. The microstructure and electric properties of Ba2+ doping ceramics were investigated. The lattice parameters of Ca1−xBaxCu3Ti4O12 (CBCTO) ceramics decreased with the Ba2+ doping, and Ba1.31Ti8O16 as secondary phase was confirmed at x = 0.1. The doping of Ba2+ resulted in uniformly distribution of small size grain (~4 μm). All the doped samples showed lower value of dielectric constant than CaCu3Ti4O12 (CCTO), due to low resistivity of the grain boundary with the Ba2+ doped samples. The nonlinear coefficient and breakdown field were significantly enhanced by Ba2+ doping.
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A.P. Ramirez, M.A. Subramanianb, M. Gardel, G. Blumberg, D. Li, T. Vogt, S.M. Shapiro, Giant dielectric constant response in a copper-titanate. Solid State Commun. 115, 217–220 (2000)
P. Liu, Y.M. Lai, Y.M. Zeng, S. Wu, Z.H. Huang, J. Han, Influence of sintering conditions on microstructure and electrical properties of CaCu3Ti4O12 (CCTO) ceramics. J. Alloys Compd. 650, 59–64 (2015)
C.C. Homes, T. Vogt, S.M. Shapiro, S. Wakimoto, A.P. Ramirez, Optical response of high-dielectric-constant perovskite-related oxide. Science 293, 673–676 (2001)
T.T. Fang, H.K. Shiau, Mechanism for developing the boundary barrier layers of CaCu3Ti4O12. J. Am. Ceram. Soc. 87, 2072–2079 (2004)
M.A. Subramanian, D. Li, N. Duan, B.A. Reisner, A.W. Sleight, High dielectric constant in ACu3Ti4O12 and ACu3Ti3FeO12 phases. J. Solid State Chem. 151, 323–325 (2000)
L. He, J.B. Neaton, M.H. Cohen, D. Vanderbilt, C.C. Homes, First-principles study of the structure and lattice dielectric response ofCaCu3Ti4O12. Phys. Rev. B Condens. Matter 65, 214112 (2002)
D.C. Sinclair, T.B. Adams, F.D. Morrison, A.R. West, CaCu3Ti4O12: One-step internal barrier layer capacitor. Appl. Phys. Lett. 80, 2153 (2002)
T.B. Adams, D.C. Sinclair, A.R. West, Giant barrier layer capacitance effects in CaCu3Ti4O12 ceramics. Adv. Mater. 14, 1321–1323 (2002)
P. Mishra, P. Kumar, Structural, dielectric and optical properties of [(BZT–BCT)-(epoxy-CCTO)] composites. Ceram. Int. 41, 2727–2734 (2015)
R. Xue, Z. Chen, H. Dai, D. Liu, T. Li, G. Zhao, Effects of rare earth ionic doping on microstructures and electrical properties of CaCu3Ti4O12 ceramics. Mater. Res. Bull. 66, 254–261 (2015)
W. Wan, C. Liu, H. Sun, Z. Luo, W.X. Yuan, H. Wu, T. Qiu, Low-toxic gelcasting of giant dielectric-constant CaCu3Ti4O12 ceramics from the molten salt powder. J. Eur. Ceram. Soc. 35, 3529–3534 (2015)
M.F.A. Rahman, J.J. Mohamed, M.F. Ain, S.D. Hutagalung, The effect of MgO dopant on the dielectric properties of CaCu3Ti4O12 ceramics. Adv. Mater. Res. 620, 219–223 (2012)
J. Jumpatam, B. Putasaeng, T. Yamwong, P. Thongbai, S. Maensiri, A novel strategy to enhance dielectric performance and non-Ohmic properties in Ca2Cu2−xMgxTi4O12. J. Eur. Ceram. Soc. 34, 2941–2950 (2014)
L. Singh, U.S. Rai, K.D. Mandal, Influence of Zn doping on microstructures and dielectric properties in CaCu3Ti4O12 ceramic synthesised by semiwet route. Adv. Appl. Ceram. 111(7), 374–380 (2012)
L. Singh, U.S. Rai, K.D. Mandal, M. Yashpal, Dielectric properties of ultrafine Zn-doped CaCu3Ti4O12 ceramic. J. Adv. Dielectr. 02, 1250007 (2012)
L. Singh, U.S. Rai, K.D. Mandal, Dielectric properties of zinc doped nanocrystalline calcium copper titanate synthesized by different approach. Mater. Res. Bull. 48(6), 2117–2122 (2013)
L. Singh, U.S. Rai, A.K. Rai, K.D. Mandal, Sintering effects on dielectric properties of Zn-doped CaCu3Ti4O12 ceramic synthesized by modified sol-gel route. Electron. Mater. Lett. 9(1), 107–113 (2013)
L. Singh, I.W. Kim, B.C. Sin, K.D. Mandal, U.S. Rai, A. Ullah, H. Chung, Y. Lee, Dielectric studies of a nano-crystalline CaCu2.90Zn0.10Ti4O12 electro-ceramic by one pot glycine assisted synthesis from inexpensive TiO2 for energy storage capacitors. RSC Adv 4(95), 52770–52784 (2014)
A. Rajabtabar-Darvishi, R. Bayati, O. Sheikhnejad-Bishe, L.D. Wang, W.L. Li, J. Sheng, W.D. Fei, Giant dielectric response and low dielectric loss in Al2O3 grafted CaCu3Ti4O12 ceramics. J. Appl. Phys. 117(9), 094103 (2015)
R.D. Shannon, Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides. Acta Crystallogr. Sect. A Found. Crystallogr. 32, 751–767 (1976)
L.F. Xu, P.B. Qi, X.P. Song, X.J. Luo, C.P. Yang, Dielectric relaxation behaviors of pure and Pr6O11-doped CaCu3Ti4O12 ceramics in high temperature range. J. Alloys Compd. 509, 7697–7701 (2011)
Arunachalam Lakshmanan, Sintering of ceramics–new emerging techniques (InTch, Croatia, 2012)
P. Thongbai, J. Jumpatam, T. Yamwong, S. Maensiri, Effects of Ta5+ doping on microstructure evolution, dielectric properties and electrical response in CaCu3Ti4O12 ceramics. J. Eur. Ceram. Soc. 32, 2423–2430 (2012)
J. Jumpatam, B. Putasaeng, T. Yamwong, P. Thongbai, S. Maensiri, Enhancement of giant dielectric response in Ga-doped CaCu3Ti4O12 ceramics. Ceram. Int. 39, 1057–1064 (2013)
P. Leret, J.F. Fernandez, J. de Frutos, D. Fernández-Hevia, Nonlinear I–V electrical behaviour of doped CaCu3Ti4O12 ceramics. J. Eur. Ceram. Soc. 27, 3901–3905 (2007)
L. Liu, D. Shi, S. Zheng, Y. Huang, S. Wu, Y. Li, L. Fang, C. Hu, Polaron relaxation and non-ohmic behavior in CaCu3Ti4O12 ceramics with different cooling methods. Mater. Chem. Phys. 139(2–3), 844–850 (2013)
L. Liu, H. Fan, X. Chen, P. Fang, Electrical properties and microstructural characteristics of nonstoichiometric CaCu3xTi4O12 ceramics. J. Alloys Compd. 469(1–2), 529–534 (2009)
S.D. Hutagalung, L.Y. Ooi, Z.A. Ahmad, Improvement in dielectric properties of Zn-doped CaCu3Ti4O12 electroceramics prepared by modified mechanical alloying technique. J. Alloys Compd. 476, 477–481 (2009)
T.T. Fang, H.Y. Chung, Reassessment of the impedance spectra and dielectric responses of undoped and CaSiO3-doped CaCu3Ti4O12. J. Appl. Phys. 109, 014102 (2011)
A.R. West, T.B. Adams, F.D. Morrison, D.C. Sinclair, Novel high capacitance materials: BaTiO3: La and CaCu3Ti4O12. J. Eur. Ceram. Soc. 24, 1439–1448 (2004)
P. Liu, Y. He, J.P. Zhou, C.H. Mu, H.W. Zhang, Dielectric relaxation and giant dielectric constant of Nb-doped CaCu3Ti4O12 ceramics under dc bias voltage. Phys. Status Solidi A 206, 562–566 (2009)
D.R. Clarke, Varistor ceramics. J. Am. Ceram. Soc. 82, 485–502 (1999)
Y. Huang, D. Shi, Y. Li, G. Li, Q. Wang, L. Liu, L. Fang, Effect of holding time on the dielectric properties and non-ohmic behavior of CaCu3Ti4O12 capacitor-varistors. J. Mater. Sci. Mater. Electron. 24(6), 1994–1999 (2012)
L. Liu, L. Fang, Y. Huang, Y. Li, D. Shi, S. Zheng, S. Wu, C. Hu, Dielectric and nonlinear current–voltage characteristics of rare–earth doped CaCu3Ti4O12 ceramics. J. Appl. Phys. 110(9), 094101 (2011)
L. Liu, Y. Huang, Y. Li, D. Shi, S. Zheng, S. Wu, L. Fang, C. Hu, Dielectric and non-Ohmic properties of CaCu3Ti4O12 ceramics modified with NiO, SnO2, SiO2, and Al2O3 additives. J. Mater. Sci. 47(5), 2294–2299 (2011)
Acknowledgments
This work was supported by the fund of the State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals (No. SKL-SPM-201535, 201548), the Technology Development Project of Yunnan Tin Group (No. Q/GYGL14042010) and Science & Technology Program of Yunnan Province (No. 2014DC019).
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Wu, S., Liu, P., Lai, Y. et al. Effect of Ba2+ doping on microstructure and electric properties of calcium copper titanate (CaCu3Ti4O12) ceramics. J Mater Sci: Mater Electron 27, 10336–10341 (2016). https://doi.org/10.1007/s10854-016-5118-9
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DOI: https://doi.org/10.1007/s10854-016-5118-9