Chelating agent size effect on thermal decomposition, phase formation and morphology characteristics of Y3+ doped Ba(Ce,Zr)O3 ceramics powder prepared by a sol-gel process

Osman, Nafisah; Mat, Ahmad Nazeer Che; Malek, Nurul Izzati Abd; Andas, Jeyashelly

doi:10.1016/j.ceramint.2021.10.007

Cited by 8 publications

(5 citation statements)

References 64 publications

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“…Osman et al experimentally analysed the chelating agent size effect on the crystallization characteristics of BaCe 0.54 Zr 0.36 Y 0.1 O 2− δ , using six different chelating agents. 262 The final results indicated the difference in phase composition and morphology characteristics for the specimens obtained by different chelating agents. Wu et al developed a flame-based gas-phase fabrication method.…”

Section: Current Status Of Nanotechnologies In Cecsmentioning

confidence: 94%

Nanotechnologies in ceramic electrochemical cells

Cao,

Ji,

Shao

2024

Chem. Soc. Rev.

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Section: Current Status Of Nanotechnologies In Cecsmentioning

confidence: 94%

Nanotechnologies in ceramic electrochemical cells

Cao,

Ji,

Shao

2024

Chem. Soc. Rev.

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“…Taking log on both sides, 𝑙𝑜𝑔𝑍 = 𝑙𝑜𝑔𝛼 − 𝑙𝑜𝑔𝑓 (6) where 𝛼 = 2 𝜋𝑖𝐶, that can be obtained from the slope of the graph on semi-log axis. The slope as well as the intercept log𝛼 yields C ∼ 2.5 nF.…”

Section: Impedance Spectroscopy Measurementsmentioning

confidence: 99%

“…Solution combustion synthesis (SCS) has emerged as a facile, economically viable, time saving, and energy efficient route for the preparation of advanced ceramics, 2–7 catalysts, 8 and nanomaterials 9 . The heat generated in the combustion process from exothermic redox reaction of xerogel makes the process self‐propagating and self‐sustaining.…”

Section: Introductionmentioning

confidence: 99%

“…1 Hence, synthesis techniques that can yield particles at nanoscale with precisely controlled size and composition are of paramount importance. Solution combustion synthesis (SCS) has emerged as a facile, economically viable, time saving, and energy efficient route for the preparation of advanced ceramics, [2][3][4][5][6][7] catalysts, 8 and nanomaterials. 9 The heat generated in the combustion process from exothermic redox reaction of xerogel makes the process self-propagating and selfsustaining.…”

Section: Introductionmentioning

confidence: 99%

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Variation of citrate to metal cation ratio for dense and phase pure BaZrO₃ via autocombustion synthesis

Manju

Babu

et al. 2022

J Am Ceram Soc.

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In this work, we demonstrate how the metal–citrate complex structure formed in the gel reflects the true stoichiometry of the redox mixtures to yield a highly dense BaZrO3 ceramic obtained as a combustion product in the sol‐gel autocombustion technique. By systematically varying the citric acid to metal cation ratio (C/M) between 0.56, 1.0, 1.5, and 2, we show that the optimal synthesis parameters correspond to C/M ratio of 1.5, at which ratio complete chelation of citrates happen with nitrates. This was confirmed using TGA, which showed a single‐step weight loss peak corresponding to C/M =1.5 but multiple peaks in C/M ratios of 0.56 and 1. PXRD and FTIR measurements on all the burnt powders showed multiphase peaks for the C/M ratios 0.56 and 1 but only peaks corresponding to BaZrO3 for C/M = 1.5, apart from a very tiny BaCO3$_3$ peak. Combustion behavior of each sol‐gel corresponding to C/M ratios 0.56, 1.0, 1.5, and 2.0 is described in detail, wherein 0.56 and 1.0 sol‐gels were found to belong to the smouldering/less intense flame‐type combustion, while 1.5 and 2 belonged to the intense flame combustion, contradicting oxidant to reductant ratio (O/R) calculations that require a stoichiometric combustion for C/M ratio of 0.56 to result in an intense flame combustion. This discrepancy was explained by the optimal usage of NO3−$_3^-$ ions in the gel structure corresponding to C/M ratio of 1.5 since a complete chelation of citrates to nitrates ions happen for C/M = 1.5. The observed combustion behavior, phase purity, and other characteristics of stoichiometric/ nonstoichiometric combustion products are illustrated by means of the extent of the 3D metal–citrate complex network formed as a function of C/M. The density of the sintered pellets that were sintered at a temperature of 1650∘$^\circ$C was found to be the best at 99.6%$\%$ for the C/M ratio 1.5. This is the highest ever reported density for BaZrO3 ceramic demonstrating that C/M ratio of 1.5 represents that metal to cation ratio for which best chelation of citrates happen with nitrates resulting in the formation of dense BaZrO3 ceramics. A comparison of BaZrO3$_3$ pellet made by solid‐state synthesis technique yielded a low value of density of 97.5%$\%$. Impedance spectroscopy measurements done on all BaZrO3$_3$ pellets yielded the lowest grain‐boundary resistance for the pellet made by the sol‐gel technique with C/M ratio of 1.5.

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“…Recently, Osman et al [ 26 ] reported the preparation of Y 3+ doped BaCe 0.54 Zr 0.36 Y 0.10 O 2.95 (BCZY) powders with various chelating agents as: citric acid, tartaric acid, glycolic acid, nitriloacetic acid, ethylenediaminetetraacetic acid and triethylenetetramine (TETA). The influence of the molecular weight of the chelating agent and functional group on thermal decomposition, phase formation and morphology of the samples were studied.…”

Section: Synthesis Of Perovskitesmentioning

confidence: 99%

Review on Sol-Gel Synthesis of Perovskite and Oxide Nanomaterials

Navas

Fuentes

Castro‐Alvarez

et al. 2021

Gels

115

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Sol-Gel is a low cost, well-established and flexible synthetic route to produce a wide range of micro- and nanostructures. Small variations in pH, temperature, precursors, time, pressure, atmosphere, among others, can lead to a wide family of compounds that share the same molecular structures. In this work, we present a general review of the synthesis of LaMnO3, SrTiO3, BaTiO3 perovskites and zinc vanadium oxides nanostructures based on Sol-Gel method. We discuss how small changes in the parameters of the synthesis can modify the morphology, shape, size, homogeneity, aggregation, among others, of the products. We also discuss the different precursors, solvents, working temperature, reaction times used throughout the synthesis. In the last section, we present novel uses of Sol-Gel with organic materials with emphasis on carbon-based compounds. All with a perspective to improve the method for future applications in different technological fields.

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Chelating agent size effect on thermal decomposition, phase formation and morphology characteristics of Y3+ doped Ba(Ce,Zr)O3 ceramics powder prepared by a sol-gel process

Cited by 8 publications

References 64 publications

Nanotechnologies in ceramic electrochemical cells

Nanotechnologies in ceramic electrochemical cells

Variation of citrate to metal cation ratio for dense and phase pure BaZrO₃ via autocombustion synthesis

Review on Sol-Gel Synthesis of Perovskite and Oxide Nanomaterials

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Chelating agent size effect on thermal decomposition, phase formation and morphology characteristics of Y3+ doped Ba(Ce,Zr)O3 ceramics powder prepared by a sol-gel process

Cited by 8 publications

References 64 publications

Nanotechnologies in ceramic electrochemical cells

Nanotechnologies in ceramic electrochemical cells

Variation of citrate to metal cation ratio for dense and phase pure BaZrO3 via autocombustion synthesis

Review on Sol-Gel Synthesis of Perovskite and Oxide Nanomaterials

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Product

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Variation of citrate to metal cation ratio for dense and phase pure BaZrO₃ via autocombustion synthesis