Dielectric properties of alumino-silicate ceramics synthesized by plasma sintering

Biswal, Bijaylaxmi; Mishra, Dilip Kumar

doi:10.1016/j.ceramint.2021.12.178

Cited by 7 publications

(4 citation statements)

References 40 publications

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“…[ 37 ] With the rise in frequency, the polarization effects decrease exponentially and only electronic polarization contributes at higher frequencies. [ 38–39 ] Thus, ϵ r and tanδ values of these CaO‐MZ composites reduce with rising frequency at different selected temperatures. At room temperature, ϵ r at 1 MHz for CaO‐CMZ and CaO‐PMZ composites is 4.7 and 3.8, respectively, whereas tanδ is 2.6 × 10 −2 and 2.19 × 10 −2 , respectively.…”

Section: Resultsmentioning

confidence: 99%

Effect of Frequency and Temperature on Dielectric and Transport Properties of CaO stabilized ZrO₂@mullite composites

Biswal,

Mishra

2024

Cryst. Res. Technol.

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This study concerns the synthesis and structure related electrical property analysis of CaO doped ZrO2@mullite composites. Two synthesis techniques (solid state reaction route and thermal plasma sintering) are used which results the formation of a composite consisting of mixed phase of orthorhombic mullite, tetragonal and monoclinic zirconia. The lattice parameters, residual strains, average crystallite size and cell volume of these CaO‐doped ZrO2@mullite composites are obtained from XRD analysis. Stabilization of t‐ZrO2 phase at room temperature is confirmed. Porous microstructure observed in SEM images results in low dielectric constant value of these composites. At room temperature and selected frequency of 1MHz, the dielectric constant and loss factor of 4.7 and 3.826 × 10−2 is observed for conventional CaO stabilized ZrO2@mullite composite and that of 3.8 and 2.19 × 10−2 is reported for plasma sintered CaO stabilized ZrO2@mullite composite. The impedance spectroscopic analysis demonstrates the negative temperature coefficient of resistance (NTCR) behavior and non‐Debye type relaxation behavior of both the CaO stabilized ZrO2@mullite composites. A negligible effect of electrode polarization is realized in these composites. The electronic band gap of conventional and plasma sintered CaO stabilized ZrO2@mullite composites is found to be around 3eV.

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Section: Resultsmentioning

confidence: 99%

Effect of Frequency and Temperature on Dielectric and Transport Properties of CaO stabilized ZrO₂@mullite composites

Biswal,

Mishra

2024

Cryst. Res. Technol.

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“…As frequency increases, Mʹ values gradually increase and attain a maximum value which can be attributed to the short‐range mobility of charge carriers within the domain structures. [ 35 ] However, with the temperature rise, the peak values get shifted toward high frequencies which can be attributed to some conductivity relaxation processes occurring in these composites. [ 36 ] For high temperatures (>150 °C) the maximum Mʹ value may arise at higher frequencies, beyond the experimental frequency limit.…”

Section: Resultsmentioning

confidence: 99%

AC Conduction Mechanism and Impedance Analysis of Conventional and Plasma‐Sintered Yttria‐Stabilized ZrO₂@Mullite Composite

Biswal,

Mishra

2023

Cryst. Res. Technol.

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The addition of 8 mol% of Y2O3 to the ZrO2@mullite composites stabilizes the metastable tetragonal phase of ZrO2 in conventional and plasma‐sintered Y2O3‐stabilized ZrO2@mullite composites. A fused, highly dense, and interconnected microstructure is formed in the case of plasma‐sintered Y2O3 stabilized ZrO2@mullite composite. At 1 MHz frequency, the room temperature and tanδ of (10.37 and 2.06) is obtained for the conventional Y2O3 stabilized ZrO2@mullite composite and that of (38.8 and 4.02) is observed for the plasma sintered Y2O3 stabilized ZrO2@mullite composite. The substitution of Y3+ in place of Zr4+ creates sufficiently large oxygen vacancies at the grain boundary regions of these composites endowed mostly with the ZrO2 phase. In conventional Y2O3‐ ZrO2@mullite composites, both dielectric relaxation as well as conductivity relaxation are observed due to the dynamic motion of dipoles and relaxation due to the presence of defect states and porous structures. This leads to higher grain boundary conductivity than the grain conductivity of these composites. Thermally activated conduction mechanisms exhibited in these composite materials are projected from the complex impedance and modulus analysis. The conventional and plasma sintered Y2O3‐ ZrO2@mullite composite has an optical bandgap of 3.26 and 3.58 eV, respectively.

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“…The development of new 2D silicate-based dielectric materials with improved performance, lower dielectric losses, and improved thermal stability could be among the future possibilities. For example, aluminum silicates are one of the dielectric materials used in capacitors and electronic device insulating layers [104]. Silicate materials could be studied for use in memristors and resistive switching devices [105].…”

Section: Electrical and Memory Devicesmentioning

confidence: 99%

A comprehensive review of atomically thin silicates and their applications

Mahapatra,

Costin,

Galvao

et al. 2024

2D Mater.

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Silicate is one of the most abundant minerals on Earth’s crust and a sustainable source of two-dimensional (2D) complex oxides. In this review, we discuss the research progress of layered and non-layered 2D silicates, their comparison with conventional 2D materials, and a brief discussion on 2D silicate applications. The review begins with thoroughly examining synthesis strategies, emphasizing the various methods used to create layered and non-layered 2D silicates. The discussions then address the distinctive features of these materials, emphasizing their physicochemical characteristics. Furthermore, the review outlines recent breakthroughs in utilizing 2D silicates in electrical and memory devices, energy harvesting, energy storage, sensors, optoelectronics, water treatment, wound healing, cancer theranostics, bacterial ablation, fire retardancy, etc. By summarizing the most recent research findings in the field of 2D silicates and providing an overview of silicate evolution, this review intends to present a comprehensive resource for researchers interested in the diverse and fascinating area of 2D silicates.

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Dielectric properties of alumino-silicate ceramics synthesized by plasma sintering

Cited by 7 publications

References 40 publications

Effect of Frequency and Temperature on Dielectric and Transport Properties of CaO stabilized ZrO₂@mullite composites

Effect of Frequency and Temperature on Dielectric and Transport Properties of CaO stabilized ZrO₂@mullite composites

AC Conduction Mechanism and Impedance Analysis of Conventional and Plasma‐Sintered Yttria‐Stabilized ZrO₂@Mullite Composite

A comprehensive review of atomically thin silicates and their applications

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Dielectric properties of alumino-silicate ceramics synthesized by plasma sintering

Cited by 7 publications

References 40 publications

Effect of Frequency and Temperature on Dielectric and Transport Properties of CaO stabilized ZrO2@mullite composites

Effect of Frequency and Temperature on Dielectric and Transport Properties of CaO stabilized ZrO2@mullite composites

AC Conduction Mechanism and Impedance Analysis of Conventional and Plasma‐Sintered Yttria‐Stabilized ZrO2@Mullite Composite

A comprehensive review of atomically thin silicates and their applications

Contact Info

Product

Resources

About

Effect of Frequency and Temperature on Dielectric and Transport Properties of CaO stabilized ZrO₂@mullite composites

Effect of Frequency and Temperature on Dielectric and Transport Properties of CaO stabilized ZrO₂@mullite composites

AC Conduction Mechanism and Impedance Analysis of Conventional and Plasma‐Sintered Yttria‐Stabilized ZrO₂@Mullite Composite