Influence of heating modes on the microstructural and dielectric properties of calcium copper titanium oxide (CaCu3Ti4O12/CCTO) using conventional and microwave sintering

Evangeline, T. Gecil; Annamalai, A. Raja

doi:10.1007/s10854-022-07764-2

Cited by 8 publications

(2 citation statements)

References 39 publications

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“…The CaCu 3 Ti (4−x) Er x O 12 (x = 0, 0.02, 0.1, 0.2, 0.5 and 1.0) ceramics were processed via sol-gel method and then sintered in a microwave furnace at 1000 • C for 10 min. Significantly, the substitution of 0.5 mol% Er in Ti sites has improved the dielectric constant (∼11,700) of CCTO in a concise duration of 10 min [76]. Accordingly, the CCTO ceramic fabricated via MWS yielded a dielectric constant > 10 4 and a very low dielectric loss (0.09) at 100 kHz [77].…”

Section: Effect Of Mws On Dielectric Propertiesmentioning

confidence: 96%

Modern Synthesis and Sintering Techniques of Calcium Copper Titanium Oxide (CaCu3Ti4O12) Ceramics and Its Current Trend in Prospective Applications: A Mini-Review

2022

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Calcium Copper Titanium Oxide (CaCu3Ti4O12/CCTO) has grasped massive attention for its colossal dielectric constant in high operating frequencies and wide temperature range. However, the synthesis and processing of CCTO directly influence the material’s properties, imparting the overall performance. Researchers have extensively probed into these downsides, but the need for a new and novel approach has been in high demand. Modern synthesis routes and advanced non-conventional sintering techniques have been employed to curb the drawbacks for better properties and performance. This review provides a short overview of the modern synthesis and sintering methods that utilize direct pulse current and electromagnetic waves to improve the material’s electrical, optical, and dielectric properties in the best ways possible. In addition, the current application of CCTO as a photocatalyst under visible light and CuO’s role in the efficient degradation of pollutants in replacement for other metal oxides has been reviewed. This research also provides a brief overview of using CCTO as a photoelectrode in zinc–air batteries (ZAB) to improve the Oxidation-reduction and evolution (ORR/OER) reactions.

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Section: Effect Of Mws On Dielectric Propertiesmentioning

confidence: 96%

Modern Synthesis and Sintering Techniques of Calcium Copper Titanium Oxide (CaCu3Ti4O12) Ceramics and Its Current Trend in Prospective Applications: A Mini-Review

2022

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“…The heating process has been upgraded using sintering techniques, which combine pressure with electric discharge and other sources, such as microwave irradiation. However, the semiconducting grains and the insulating grain boundaries change over time due to processing inputs and the presence of other elements; therefore, all of the above-mentioned parameters play a significant role [ 19 , 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Europium Addition on the Microstructure and Dielectric Properties of CCTO Ceramic Prepared Using Conventional and Microwave Sintering

Evangeline

Ctibor

2023

Molecules

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In this work, Eu2O3-doped (CaCu3Ti4O12)x of low dielectric loss have been fabricated using both conventional (CS) and microwave sintering (MWS), where x = Eu2O3 = 0.1, 0.2, and 0.3, respectively. According to X-ray diffraction (XRD) and scanning electron microscope (SEM) reports, increasing the concentration of Eu3+ in the CCTO lattice causes the grain size of the MWS samples to increase and vice versa for CS. The X-ray photoelectron spectroscopy (XPS) delineated the binding energies and charge states of the Cu2+/Cu+ and Ti4+/Ti3+ transition ions. Energy dispersive spectroscopy (EDS) analysis revealed no Cu-rich phase along the grain boundaries that directly impacts the dielectric properties. The dielectric characteristics, which include dielectric constant (ε) and the loss (tan δ), were examined using broadband dielectric spectrometer (BDS) from 10 to 107 Hz at ambient temperature. The dielectric constant was >104 and >102 for CS and MWS samples at x > 0.1, respectively, with the low loss being constant even at high frequencies due to the effective suppression of tan δ by Eu3+. This ceramic of low dielectric loss has potential for commercial applications at comparatively high frequencies.

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High resistance and giant permittivity study of Ni0.4Zn0.6Fe2O4 spinel ferrite as a function of frequency and temperature

Hajlaoui

Dhahri

Khirouni

2022

J Mater Sci: Mater Electron

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Influence of heating modes on the microstructural and dielectric properties of calcium copper titanium oxide (CaCu3Ti4O12/CCTO) using conventional and microwave sintering

Cited by 8 publications

References 39 publications

Modern Synthesis and Sintering Techniques of Calcium Copper Titanium Oxide (CaCu3Ti4O12) Ceramics and Its Current Trend in Prospective Applications: A Mini-Review

Modern Synthesis and Sintering Techniques of Calcium Copper Titanium Oxide (CaCu3Ti4O12) Ceramics and Its Current Trend in Prospective Applications: A Mini-Review

Effect of Europium Addition on the Microstructure and Dielectric Properties of CCTO Ceramic Prepared Using Conventional and Microwave Sintering

High resistance and giant permittivity study of Ni0.4Zn0.6Fe2O4 spinel ferrite as a function of frequency and temperature

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