Role of point defects in gas sensing effects of metal oxides

Kamble, Vinayak B.

doi:10.1016/b978-0-323-85588-4.00005-2

Cited by 3 publications

(3 citation statements)

References 77 publications

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“…The synthesis process has a substantial influence on the crystal structure and luminescent characteristics of gadolinium oxide nanoparticles. Wet chemical processes are straightforward, efficient, and often used in the production of oxide ceramic materials [7]. Using wet chemical techniques enables a substantial reduction in the temperature required for the synthesis of oxide nanoparticles, consequently accelerating the technical process.…”

Section: Introductionmentioning

confidence: 99%

Sol-Gel Synthesis of Gd2O3:Nd3+ Nanopowders and the Study of Their Luminescent Properties

Moussaoui,

Bulyga,

Kuzmenko

et al. 2024

Luminescence - Basic Concepts and Emerging New Applications

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The synthesis of gadolinium oxide nanopowders doped with neodymium (Gd2O3:Nd3+) 30 nm in size was carried out using the citrate sol-gel method that included the simultaneous stabilization of nanoparticles using citric acid and polyvinylpyrrolidone (PVP). This study proposes and assesses a sol-gel synthesis process that involves the use of two different organic stabilizers with different thermal stabilities. Citric acid and polyvinylpyrrolidone were used as organic modifying components, playing a double role in the synthesis process, that is, acting as stabilizers of forming nanoparticles in colloidal solutions and serving as fuel additives in the process of heat treatment of materials. The structural and optical properties of Gd2O3:Nd3+ were investigated using photoluminescence, FTIR spectroscopy, DTA/TG, scanning electron microscope (SEM), and XRD analysis.

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Section: Introductionmentioning

confidence: 99%

Sol-Gel Synthesis of Gd2O3:Nd3+ Nanopowders and the Study of Their Luminescent Properties

Moussaoui,

Bulyga,

Kuzmenko

et al. 2024

Luminescence - Basic Concepts and Emerging New Applications

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“…In the past decades, polymer–ceramic composites/nanocomposites have been of great interest to researchers for their novel applications. There are various ceramic oxides/particles which have been used by different research groups in making polymer composites for various applications. − However, there is an increase in demand for electroceramic oxide fillers in making polymer composites due to their various electrical properties. − Technically, these special classes of ceramic oxides have been explored for their ferroelectric, piezoelectric, and dielectric responses and have been used in nonvolatile memories [dynamic random access memories (DRAMs)], high-capacity dielectric devices, and materials for energy storage and conversion. − The incorporation of these electroceramic fillers in the matrix polymer has become a common practice to improve the electrical, mechanical, and other properties. These polymer–ceramic composites/nanocomposites can be effectively used as flexible electronic and electrical materials …”

Section: Introductionmentioning

confidence: 99%

“… 21 − 23 24 25 26 However, there is an increase in demand for electroceramic oxide fillers in making polymer composites due to their various electrical properties. 27 − 29 30 31 32 Technically, these special classes of ceramic oxides have been explored for their ferroelectric, piezoelectric, and dielectric responses and have been used in nonvolatile memories [dynamic random access memories (DRAMs)], high-capacity dielectric devices, and materials for energy storage and conversion. 33 − 35 The incorporation of these electroceramic fillers in the matrix polymer has become a common practice to improve the electrical, mechanical, and other properties.…”

Section: Introductionmentioning

confidence: 99%

Dielectric and Mechanical Properties of PDMS–La₂Ba₂XZn₂Ti₃O₁₄ (X = Mg/Ca/Sr) Nanocomposites

Nayak,

Sahoo,

Rout

et al. 2023

ACS Omega

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Flexible polydimethylsiloxane–La2Ba2XZn2Ti3O14 (X = Mg/Ca/Sr) [PDMS–LBT] nanocomposites with high permittivity (dielectric constant, k) are prepared through a room-temperature mixing process. The LBT nanoparticles used in this study are prepared through a high-temperature solid-state reaction. It is observed that LBT (X = Mg/Ca) nanoparticles are spherical in nature, with particle size ∼20 nm, as observed from the HRTEM images, whereas LBT (X = Sr) nanoparticles are cubical in nature with particle size ≥100 nm. These LBT (X = Mg/Ca/Sr) nanoparticles are crystalline in nature, as apparent from the XRD analysis and SAED patterns. The permittivity of LBT nanoparticles is higher when “Ca” is present in place of “X”. These three oxides show a temperature-dependent dielectric behavior, where LBT nanoparticles with “Sr” show a sharp change in permittivity at a temperature of ∼105 °C. These kinds of oxide materials, especially LBT (X = Sr) nanoparticles/oxides, can be used in dielectric/resistive switching devices. The effect of LBT nanoparticle concentration on the dielectric and mechanical properties of PDMS–LBT nanocomposites is widely studied and found that there is a significant increase in dielectric constant with an increase in the concentration of LBT nanoparticles. There is a decrease in the volume resistivity with the increase in the LBT nanoparticle concentration. All the PDMS–LBT nanocomposites have low dielectric loss (ε″) compared to the dielectric constant value. It is found that both permittivity (ε′) and AC conductivity (σac) of PDMS–LBT composites are increased with the temperature at a frequency of 1 Hz. The % elongation at break (% EB) and tensile strength (TS) decrease with the LBT nanoparticle concentration in the matrix PDMS, which is due to the non-reinforcing behavior of LBT nanoparticles. The distribution and dispersion of LBT nanoparticles in the matrix PDMS are observed through HRTEM and AFM/SPM.

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Dielectric properties, relaxation time and conduction behavior of MoO3 doped V2O5–ZnO–CuO glassy semiconducting system

Halder,

Ali,

Chattopadhyay

et al. 2024

Appl. Phys. A

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Role of point defects in gas sensing effects of metal oxides

Cited by 3 publications

References 77 publications

Sol-Gel Synthesis of Gd2O3:Nd3+ Nanopowders and the Study of Their Luminescent Properties

Sol-Gel Synthesis of Gd2O3:Nd3+ Nanopowders and the Study of Their Luminescent Properties

Dielectric and Mechanical Properties of PDMS–La₂Ba₂XZn₂Ti₃O₁₄ (X = Mg/Ca/Sr) Nanocomposites

Dielectric properties, relaxation time and conduction behavior of MoO3 doped V2O5–ZnO–CuO glassy semiconducting system

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Role of point defects in gas sensing effects of metal oxides

Cited by 3 publications

References 77 publications

Sol-Gel Synthesis of Gd2O3:Nd3+ Nanopowders and the Study of Their Luminescent Properties

Sol-Gel Synthesis of Gd2O3:Nd3+ Nanopowders and the Study of Their Luminescent Properties

Dielectric and Mechanical Properties of PDMS–La2Ba2XZn2Ti3O14 (X = Mg/Ca/Sr) Nanocomposites

Dielectric properties, relaxation time and conduction behavior of MoO3 doped V2O5–ZnO–CuO glassy semiconducting system

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Dielectric and Mechanical Properties of PDMS–La₂Ba₂XZn₂Ti₃O₁₄ (X = Mg/Ca/Sr) Nanocomposites