(Al3+, Nb5+) co–doped CaCu3Ti4O12: An extended approach for acceptor–donor heteroatomic substitutions to achieve high–performance giant–dielectric permittivity

Boonlakhorn, Jakkree; Kidkhunthod, Pinit; Chanlek, Narong; Thongbai, Prasit

doi:10.1016/j.jeurceramsoc.2017.08.040

Cited by 74 publications

(65 citation statements)

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“…Recently, giant dielectric materials belonging to the family of ACu 3 Ti 4 O 12 compounds have generated considerable interest due to their potential applications for the miniaturization of microelectronic devices, for example, multilayer ceramic capacitors. CaCu 3 Ti 4 O 12 (CCTO) is a popular material among the ACu 3 Ti 4 O 12 compounds because it exhibits a very large dielectric permittivity ( ε ′ ~10 4 ) over a wide temperature range without a detectable phase transition in the temperature range of 35‐100 K . However, a structural phase transition occurred in CCTO ceramics at 726‐732 K .…”

Section: Introductionmentioning

confidence: 99%

Giant dielectric behavior of monovalent cation/anion (Li⁺, F⁻) co‐doped CaCu₃Ti₄O₁₂ ceramics

et al. 2019

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Giant dielectric behavior and electrical properties of monovalent cation/anion (Li+, F−) co‐doped CaCu3Ti4O12 ceramics prepared by a solid‐state reaction route were systematically investigated. Substitution of Li+ and F− led to a significantly enlarged mean grain size. A reduced loss tangent (tanδ ~0.06) with the retainment of an ultra‐high dielectric permittivity (ε′ ~7.7‐8.8 × 104) was achieved in the co‐doped ceramics, while the breakdown electric field and nonlinear coefficient of CaCu3Ti4O12 ceramics were increased by co‐doping with (Li+, F−). The variations in nonlinear electrical properties and giant dielectric response, as well as the dielectric relaxation, were well explained by the Maxwell‐Wagner polarization model for an electrically heterogeneous microstructure, in which a Schottky barrier height at the grain boundaries (GBs) was formed. ε′ was closely correlated to the GB capacitance. Significantly decreased tanδ value and enhanced nonlinear properties were related to a significant increase in the GB resistance, which was attributed to the significantly increased potential barrier height and conduction activation energy at the GBs. The semiconducting nature of the grains was also studied using X‐ray photoelectron spectroscopy and found to originate from the presence of Cu+ and Ti3+ ions.

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Section: Introductionmentioning

confidence: 99%

Giant dielectric behavior of monovalent cation/anion (Li⁺, F⁻) co‐doped CaCu₃Ti₄O₁₂ ceramics

et al. 2019

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“…The obtained parameters from general structure analysis system (GSAS) refinement fitting are displayed in Table . Our refinement achieved a good reliability . It was observed that the obtained lattice parameter ( a / b / c ) values for CdCTO‐04Zn and CdCTO‐08Zn are not significantly different from those for CdCTO, which probably results from the very similar ionic radii of Zn 2+ (0.60 Å) and Cu 2+ ions (0.57 Å).…”

Section: Resultsmentioning

confidence: 56%

“…The dielectric permittivity maintains a high value above 2.0 × 10 4 and seems to be frequency independent when the measured frequency is below 10 5 Hz, while a sharp decrease to ~100 occurs when the frequency reaches 10 7 ~10 8 Hz. This is a typical characteristic of the Debye (Maxwell‐Wagner) frequency response, and the dielectric plateau at low frequencies could be attributed to the electronic heterogeneity in the CdCu 3− x Zn x Ti 4 O 12 ceramics . To better understand the effect of Zn doping, we display the dielectric permittivity and dielectric loss tangent as a function of the Zn contents at 0.1, 1, and 10 kHz in Figure B.…”

Section: Resultsmentioning

confidence: 99%

“…Notably, a large semicircular arc at low frequencies and a small semicircular arc at high frequencies are observed in all of the samples in Figure A,B. It is widely accepted that the large semicircular arc at low frequencies should be attributed to the response from insulating grain boundaries and that the small semicircular arc at high frequencies comes from the response of semiconducting grains . To estimate the individual resistances for the grain boundaries R gb and grains R g , equivalent circuits consisting of two parallel resistor‐capacitor (RC) elements connected in series were used to simulate calculations with the ZsimpWin Versions 3.00 software package.…”

Section: Resultsmentioning

confidence: 99%

“…The search for ultrahigh permittivity ( ε r > 10 3 ) materials is one of the most popular research topics in the fields of microelectronics and energy storage devices . CaCu 3 Ti 4 O 12 (CCTO), a typical ACu 3 Ti 4 O 12 (ACTO, where A = Ca, Cd, La 2/3 , Y 2/3 , Bi 2/3 , Na 1/2 La 1/2 , Na 1/2 Y 1/2 , or Na 1/2 Bi 1/2 , for example) ceramic, has been widely studied due to its ultrahigh dielectric permittivity and good frequency/thermal stability.…”

Section: Introductionmentioning

confidence: 99%

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Grain boundary engineering that induces ultrahigh permittivity and decreased dielectric loss in CdCu₃Ti₄O₁₂ ceramics

Peng

Liang

et al. 2019

J Am Ceram Soc

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Dielectric materials with ultrahigh permittivity are attracting attention due to the increasing demand for these types of materials for microelectronics and energy storage applications. In this work, we successfully synthesized Zn‐doped CdCu3Ti4O12 (CdCTO) ceramics with low dielectric loss and large permittivity via an ordinary mixed‐oxide technique. Remarkably, at a Zn doping level of 0.10, a CdCu2.9Zn0.1Ti4O12 ceramic exhibited both decreased dielectric loss tangent of ~0.058 and large dielectric permittivity > 4.0 × 104, as well as a good frequency stability over a wide frequency range from 40 Hz to 106 Hz. The high dielectric performance was attributed to the enhanced grain boundary resistance and internal barrier layer capacitor (IBLC) effect due to the fine and uniform grains that formed upon Zn doping. The findings reported in this work provide valuable insights into how to simultaneously realize a low dielectric loss and high permittivity in CdCTO and other related dielectric ceramics.

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From Synthesis to Applications: Copper Calcium Titanate (CCTO) and its Magnetic and Photocatalytic Properties

et al. 2019

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Investigations focusing on electrical energy storage capacitors especially the dielectric ceramic capacitors for high energy storage density are attracting more and more attention in the recent years. Ceramic capacitors possess a faster charge‐discharge rate and improved mechanical and thermal properties compared with other energy storage devices such as batteries. The challenge is to obtain ceramic capacitors with outstanding mechanical, thermal and storage properties over large temperature and frequencies ranges. ABO 3 as a type of perovskites showed a strong piezoelectric, dielectric, pyroelectric, and electro‐optic properties useful as energy storage and environmental devices. CaCu 3 Ti 4 O 12 (CCTO) perovskite with cubic lattice (Im3 symmetry) was discovered to have a colossal dielectric constant (10 4 ) that is stable over a wide range of frequencies (10 Hz–1 MHz) and temperature independence (100–300 K). The origin of this high dielectric constant is not fully established, specially because it is the same for single crystal and thin films. In this review, the history of CCTO will be introduced. The synthesis and the sintering approaches, the dopant elements used as well as the applications of CCTO will be reported. In addition to dielectrical properties useful to energy storage devices; CCTO could serve as photocatalytic materials with a very good performance in visible light.

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(Al3+, Nb5+) co–doped CaCu3Ti4O12: An extended approach for acceptor–donor heteroatomic substitutions to achieve high–performance giant–dielectric permittivity

Cited by 74 publications

References 36 publications

Giant dielectric behavior of monovalent cation/anion (Li⁺, F⁻) co‐doped CaCu₃Ti₄O₁₂ ceramics

Giant dielectric behavior of monovalent cation/anion (Li⁺, F⁻) co‐doped CaCu₃Ti₄O₁₂ ceramics

Grain boundary engineering that induces ultrahigh permittivity and decreased dielectric loss in CdCu₃Ti₄O₁₂ ceramics

From Synthesis to Applications: Copper Calcium Titanate (CCTO) and its Magnetic and Photocatalytic Properties

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(Al3+, Nb5+) co–doped CaCu3Ti4O12: An extended approach for acceptor–donor heteroatomic substitutions to achieve high–performance giant–dielectric permittivity

Cited by 74 publications

References 36 publications

Giant dielectric behavior of monovalent cation/anion (Li+, F−) co‐doped CaCu3Ti4O12 ceramics

Giant dielectric behavior of monovalent cation/anion (Li+, F−) co‐doped CaCu3Ti4O12 ceramics

Grain boundary engineering that induces ultrahigh permittivity and decreased dielectric loss in CdCu3Ti4O12 ceramics

From Synthesis to Applications: Copper Calcium Titanate (CCTO) and its Magnetic and Photocatalytic Properties

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Product

Resources

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Giant dielectric behavior of monovalent cation/anion (Li⁺, F⁻) co‐doped CaCu₃Ti₄O₁₂ ceramics

Giant dielectric behavior of monovalent cation/anion (Li⁺, F⁻) co‐doped CaCu₃Ti₄O₁₂ ceramics

Grain boundary engineering that induces ultrahigh permittivity and decreased dielectric loss in CdCu₃Ti₄O₁₂ ceramics