Dielectric properties of CaCu3Ti4O12/Pb(Zr0.52Ti0.48)O3 composite ceramics

Rajabtabar-Darvishi, A.; Li, W.L.; Sheikhnejad-Bishe, O.; Wang, L.D.; Zhao, Yu; Zhang, S.Q.; Fei, W.D.

doi:10.1016/j.jallcom.2011.11.052

Cited by 16 publications

(5 citation statements)

References 25 publications

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“…gained considerable attention due to its abnormal high dielectric constant (e 0 $ 10 3 -10 5 ) over the temperature range from 100 to 600 K and its apparent nonlinear current-voltage (current density-electric field, J-E) properties [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. By considering the dielectric and nonlinear electrical properties of these perovskite-type materials, it is believed that these ceramics are promising materials for many applications.…”

Section: Introductionmentioning

confidence: 99%

Modified giant dielectric properties of samarium doped CaCu3Ti4O12 ceramics

Thongbai

Putasaeng

Yamwong

et al. 2012

Materials Research Bulletin

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Section: Introductionmentioning

confidence: 99%

Modified giant dielectric properties of samarium doped CaCu3Ti4O12 ceramics

Thongbai

Putasaeng

Yamwong

et al. 2012

Materials Research Bulletin

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“…Therefore, studies on the dielectric loss of CCTO have received much attention. 1,13,14 The relationship between the dielectric loss and frequency has been clearly shown in some research results. 1,5,6,10,11 From these studies, it can be concluded that the dielectric loss in CCTO ceramics mainly originates from semiconducting grains and insulating GBs.…”

Section: Introductionmentioning

confidence: 93%

“…[10][11][12] Therefore, the effect of grain size on the dielectric constant is one of the pieces of evidence for the extrinsic mechanisms as elucidated by the IBLC model. 13,14 However, its relatively high dielectric loss is one of the main problems regarding use of CCTO in practical applications. In particular, an enhancement of e is usually accompanied by an increase in tan d. It is essential to decrease the dielectric loss if CCTO ceramics are to be introduced into commercial applications such as barrier layer capacitors.…”

Section: Introductionmentioning

confidence: 99%

Dielectric and Nonohmic Properties of CaCu3Ti4O12/SrTiO3 Ceramics

Xue

Liu

Chen

et al. 2015

Journal of Elec Materi

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In this work, (1 À x)CaCu 3 Ti 4 O 12 -xSrTiO 3 [(1 À x)CCTO/xST, x = 0% to 2%] ceramic samples were prepared by the solid-state reaction method. The dielectric and electrical properties of CaCu 3 Ti 4 O 12 (CCTO) and CaCu 3 Ti 4 O 12 /SrTiO 3 (CCTO/ST) ceramics were investigated. The results show that a small amount of Sr 2+ can enter the lattice of CCTO. The mean grain size of the ceramic samples increased greatly for x = 0.5% and then decreased for x = 0.75% to 2%. ST addition and Sr 2+ preferential occupancy in CCTO grains should be responsible for the change of the microstructure. Interestingly, the dielectric constant (e) of the 0.5% ST-added sample increased significantly while the dielectric loss (tan d) remained low. With further increase of the ST content, the e and tan d values of the CCTO ceramics decreased monotonically while the nonlinear current-voltage properties were significantly enhanced. The change in the potential barrier height is thought to be the main cause for the opposite behaviors in the dielectric properties and nonohmic characteristics.

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“…Our results showed that the composite CCTO-PZT with the content near 50% of PZT has the great value of the maximum of the dielectric permittivity. Rajabtabar et al 12 have investigated the dielectric properties of CaCu 3 Ti 4 O 12 /Pb(Zr 0.52 Ti 0.48 )O 3 , the considered ratio Zr/Ti of PZT corresponds to the morphotropic phase with the coexistence of both rhombohedral and tetragonal phases of PZT, their results showed that the composite ceramics with the Pb(Zr 0.52 Ti 0.48 )O 3 content of 20% has the highest dielectric constant and the lowest dielectric loss. In the present research, a new CCTO-PZT with a ratio Zr/Ti=48/52 which is close to the morphotropic phase boundary with a single tetragonal phase was synthesized from PZT and CCTO which were prepared by sol-gel and solid state route respectively.…”

Section: Introductionmentioning

confidence: 99%

Study of the dielectric, optical and microstructure properties of CaCu3Ti4O12â€“PbZr0.48Ti0.52O3 ceramic system with different compositions

Hadi¹,

Abdi²,

Lamcharfi³

et al. 2019

Mediterr.J.Chem.,

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In this paper, composite ceramics (1-x)CaCu3Ti4O12â€“(x)PbZr0.48Ti0.52O3 (with x =0.00, 0.50 and 1.00), denoted CCTO-PZT, were prepared by a three-stages modified method, in order to achieve high dielectric constant and low loss. Structural investigations carried out by X-ray diffraction (XRD), and FT-IR spectroscopy showed the formation of pure cubic and tetragonal phases for x = 0.00 and x=1.00 compositions, respectively. XRD showed the coexistence of both phases in the CCTO-PZT composite. The morphology of the ceramics was examined by scanning electron micrograph (SEM), results reveal a homogeneous microstructure with two types of grains corresponding to PZT (smaller grains) and CCTO (large grains). Dielectric measurements carried out by an impedance analyzer; show that the dielectric constant of the CCTO-PZT composite is higher than the pure samples (CCTO and PZT) one. The temperature dependence of the ac conductivity indicated that the conduction follows the Arrhenius law and the conduction process is due to the single and the doubly ionized. The optical band gap of the PZT is 2.25 eV, and the band gap decreased in the CCTO/PZT composite.

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Dielectric properties of CaCu3Ti4O12/Pb(Zr0.52Ti0.48)O3 composite ceramics

Cited by 16 publications

References 25 publications

Modified giant dielectric properties of samarium doped CaCu3Ti4O12 ceramics

Modified giant dielectric properties of samarium doped CaCu3Ti4O12 ceramics

Dielectric and Nonohmic Properties of CaCu3Ti4O12/SrTiO3 Ceramics

Study of the dielectric, optical and microstructure properties of CaCu3Ti4O12â€“PbZr0.48Ti0.52O3 ceramic system with different compositions

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