[2] [2] HONG S H, KIM D Y, PARK H M, et al.Electric and dielectric properties of Nb-doped CaCu3Ti4O12 ceramics［J］.Journal of the American Ceramic Society, 2007, 90(7):2118-2121.

[3] [3] WU S, LIU P, LAI Y, et al.Effect of Ba2+ doping on microstructure and electric properties of calcium copper titanate (CaCu3Ti4O12) ceramics ［J］.Journal of Materials Science: Materials in Electronics, 2016, 27(10):10336-10341.

[5] [5] ADAMS T B, SINCLAIR D C, WEST A R, et al.Giant barrier layer capacitance effects in CaCu3Ti4O12 ceramics［J］.Advanced Materials, 2002, 14(18):1321-1323.

[6] [6] SINCLAIR D C, ADAMS T B, MORRISON F D, et al.CaCu3Ti4O12:One-step internal barrier layer capacitor［J］.Appl Phys Lett, 2002, 80(12):2153-2155.

[7] [7] SHRI P B, VARMA K B R.Microstructural and dielectric properties of donor doped (La3+) CaCu3Ti4O12 ceramics［J］. Journal of Materials Science:Materials in Electronics, 2006, 17(11):899-907.

[8] [8] HE K, LUO Y, YU R, et al.Inuence of Yb2O3 on electrical and microstructural characteristics of CaCu3Ti4O12 ceramics［J］. Materials Research Bulletin, 2015, 69:98-103.

[9] [9] LI T, CHEN J, LIU D, et al.Effect of NiO-doping on the microstructure and the dielectric properties of CaCu3Ti4O12 ceramics［J］. Ceramics International, 2014, 40(7):9061-9067.

[10] [10] BOONLAKHORN J, KIDKHUNTHOD P, PUTASAENG B, et al.Giant dielectric behavior and electrical properties of Ca1-3x/2LuxCu3Ti4O12 ceramics［J］.Applied Physics a Materials Science & Processing, 2015, 120(1):89-95.

[11] [11] NAUTIYAL A, AUTRET C, HONSTETTRE C, et al.Local analysis of the grain and grain boundary contributions to the bulk dielectric properties of Ca(Cu3-yMgy)Ti4O12 ceramics:Importance of the potential barrier at the grain boundary［J］.Journal of the European Ceramic Society, 2016, 36(6):1391-1398.

[12] [12] LI W, QIU S Y, CHEN N, et al.Enhanced dielectric response in Mg-doped CaCu3Ti4O12 ceramics［J］.Journal of Materials Science & Technology, 2010, 26(8):682-686.

[13] [13] FENG L, TANG X, YAN Y, et al.Decrease of dielectric loss in CaCu3Ti4O12 ceramics by La doping［J］.Physica Status Solidi (a)-Applications and Materials Science, 2006, 203(4):R22-R24.

[14] [14] RANI S, AHLAWAT N, SANGWAN K M, et al.Structural investigation and giant dielectric response of CaCu3Ti4O12 ceramic by Nd/Zr co-doping for energy storage applications［J］.Journal of Materials Science: Materials in Electronics, 2018, 29(13):10825-10833.

[15] [15] RANI S, AHLAWAT N, KUNDU R S, et al.Structural and dielectric properties of Ca0.95Nd0.05Cu3Ti3.95Zr0.05O12 ceramic［J］.Ferroelectrics, 2017, 516:156-166.

[16] [16] BOONLAKHORN J, CHANLEK N, SREPUSHARAWOOT P, et al.Improved dielectric properties of CaCu3-xSnxTi4O12ceramics with high permittivity and reduced loss tangent［J］.Journal of Materials Science:Materials in Electronics, 2020, 31:15599-15607.