Investigation of dielectric and electrochemical behavior of CaCu3−Mn Ti4O12 (x = 0, 1) ceramic synthesized through semi-wet route

Kumar, Vinod; Kumar, Arun; Verma, Manisha; Singh, Shruti; Pandey, Santosh; Shankar, V. Siva; Prajapati, Dinesh; Das, Tapas; Singh, Neha; Mandal, K. D.

doi:10.1016/j.matchemphys.2020.122804

Cited by 35 publications

(4 citation statements)

References 32 publications

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“…The Cu + , Cu 2+ , Ti 3+ , and Ti 4+ subpeaks are located in the range of 931.70–932.28, 933.47–935.08, 456.84–463.00, and 457.68–464.08 eV, respectively. This result is in agreement with previous studies 50–52 . The fitted curve of the XPS spectrum of O is shown in Figure 6D,J.…”

Section: Resultssupporting

confidence: 93%

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Extremely enhanced thermal stability of Y_2/3Cu₃Ti₄O₁₂ ceramics by a Pechini method

Wei

et al. 2022

J Am Ceram Soc.

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Y 2/3 Cu 3 Ti 4 O 12 ceramic is a novel semiconductor with potential applications in electronic devices. However, its resistance drift and surface structure defects limit the application for negative temperature coefficient thermistor devices. A comparative study of solid-phase and a Pechini processing of Y 2/3 Cu 3 Ti 4 O 12 is presented in this paper, in the particular comparative study of stability. The Pechini method is found to be effective in lowering sintering temperature and improving thermal stability (ΔR/R 0 < 0.3%) in comparison with solid-phase method. The origin of the stability deterioration is related to the oxidation state of Cu ions and the migration of sublattice. The Pechini method overcomes stoichiometric ratio deviations and cation vacancy diffusion, thus reducing metal ion segregation in a continuous high-temperature environment and thereby showing unique insensitivity to oxygen. The important role of the Pechini method in improving thermal stability is revealed, which is expected to be used in the preparation of high stability electron devices.

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Section: Resultssupporting

confidence: 93%

“…This result is in agreement with previous studies. [50][51][52] The fitted curve of the XPS spectrum of O is shown in Figure 6D,J Table 3. The concentration ratios were calculated using the approximate equation:…”

Section: Xps Analysismentioning

confidence: 99%

Extremely enhanced thermal stability of Y_2/3Cu₃Ti₄O₁₂ ceramics by a Pechini method

Wei

et al. 2022

J Am Ceram Soc.

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“…Colossal dielectric permittivity of ceramic oxides with very large dielectric constant (ε > 10 4 ) has been extensively studied for use in electronics applications, especially for capacitive-based devices such as ceramic capacitors [1][2][3][4][5][6][7][8][9][10][11]. Since the colossal dielectric permittivity of CaCu 3 Ti 4 O 12 (CCTO) ceramics was reported by Subramanian, et al [12], many simple and complex oxides such as NiO, ZnO, TiO 2 , SnO 2 , BiFeO 3 , and CCTObased ceramics, have been investigated [1][2][3][13][14][15][16][17][18][19][20][21][22][23][24]. However, these ceramic oxides have limitations for application in electronic devices.…”

Section: Introductionmentioning

confidence: 99%

Effects of Charge Compensation on Colossal Permittivity and Electrical Properties of Grain Boundary of CaCu3Ti4O12 Ceramics Substituted by Al3+ and Ta5+/Nb5+

et al. 2021

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The effects of charge compensation on dielectric and electrical properties of CaCu3Ti4-x(Al1/2Ta1/4Nb1/4)xO12 ceramics (x = 0−0.05) prepared by a solid-state reaction method were studied based on the configuration of defect dipoles. A single phase of CaCu3Ti4O12 was observed in all ceramics with a slight change in lattice parameters. The mean grain size of CaCu3Ti4-x(Al1/2Ta1/4Nb1/4)xO12 ceramics was slightly smaller than that of the undoped ceramic. The dielectric loss tangent can be reduced by a factor of 13 (tanδ ~0.017), while the dielectric permittivity was higher than 104 over a wide frequency range. Impedance spectroscopy showed that the significant decrease in tanδ was attributed to the highly increased resistance of the grain boundary by two orders of magnitude. The DFT calculation showed that the preferential sites of Al and Nb/Ta were closed together in the Ti sites, forming self-charge compensation, and resulting in the enhanced potential barrier height at the grain boundary. Therefore, the improved dielectric properties of CaCu3Ti4-x(Al1/2Ta1/4Nb1/4)xO12 ceramics associated with the enhanced electrical properties of grain boundaries. In addition, the non-Ohmic properties were also improved. Characterization of the grain boundaries under a DC bias showed the reduction of potential barrier height at the grain boundary. The overall results indicated that the origin of the colossal dielectric properties was caused by the internal barrier layer capacitor structure, in which the Schottky barriers at the grain boundaries were formed.

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“…The most basic characteristic of Pauling's rule is to use positive ion coordination polyhedrons as the basic structural unit instead of the common lattice structure as the basic structural unit. Therefore, when studying its complex structure, the unit presented by it has its own uniqueness [16]. This rule plays a very important role in understanding the structure of ionic crystals, and it also plays a great reference for crystals with covalent bonds and ions.…”

Section: The Structural Foundation and Basic Performance Of Ceramicsmentioning

confidence: 99%

The Application of Nanoparticle Ceramic Materials in the Design of Modern Handicrafts

Gao

Lee

Huang

2022

Journal of Nanomaterials

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With the development of society, people’s purchasing power is gradually increasing, and more and more people choose to buy handicrafts. The popularity of handicrafts has also promoted the development of production technology and production materials, and high-quality handicrafts are most favored by consumers. As an enduring material, ceramics are also under continuous development. This article is aimed at studying nanoceramic materials and gaining a detailed understanding of the classification, structure, and manufacturing process of nanoceramic materials. In the experimental stage of this article, through the analysis of whether nanoceramic materials and technology are used in modern crafts, it is verified whether nanoceramic materials contribute to the advancement of modern craft design and the growth of product sales. This article shows through experimental research that the application of nanoceramic materials to handicrafts can not only increase its sales by more than 30% but also increase its sales unit price by 36%.

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Investigation of dielectric and electrochemical behavior of CaCu3−Mn Ti4O12 (x = 0, 1) ceramic synthesized through semi-wet route

Cited by 35 publications

References 32 publications

Extremely enhanced thermal stability of Y_2/3Cu₃Ti₄O₁₂ ceramics by a Pechini method

Extremely enhanced thermal stability of Y_2/3Cu₃Ti₄O₁₂ ceramics by a Pechini method

Effects of Charge Compensation on Colossal Permittivity and Electrical Properties of Grain Boundary of CaCu3Ti4O12 Ceramics Substituted by Al3+ and Ta5+/Nb5+

The Application of Nanoparticle Ceramic Materials in the Design of Modern Handicrafts

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Investigation of dielectric and electrochemical behavior of CaCu3−Mn Ti4O12 (x = 0, 1) ceramic synthesized through semi-wet route

Cited by 35 publications

References 32 publications

Extremely enhanced thermal stability of Y2/3Cu3Ti4O12 ceramics by a Pechini method

Extremely enhanced thermal stability of Y2/3Cu3Ti4O12 ceramics by a Pechini method

Effects of Charge Compensation on Colossal Permittivity and Electrical Properties of Grain Boundary of CaCu3Ti4O12 Ceramics Substituted by Al3+ and Ta5+/Nb5+

The Application of Nanoparticle Ceramic Materials in the Design of Modern Handicrafts

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Extremely enhanced thermal stability of Y_2/3Cu₃Ti₄O₁₂ ceramics by a Pechini method

Extremely enhanced thermal stability of Y_2/3Cu₃Ti₄O₁₂ ceramics by a Pechini method