Formation of metastable tetragonal zirconia nanoparticles: Competitive influence of the dopants and surface state

Gorban, Oksana; Synyakina, Susanna; Волкова, Г. К.; Gorban, S. I.; Konstantiova, Tetyana; Lyubchik, Svetlana B.

doi:10.1016/j.jssc.2015.09.026

Cited by 20 publications

(1 citation statement)

References 27 publications

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“…The decrease of the crystallization temperature of the aerogel samples correlates with the size of lanthanide ions in the periodic table from La 3+ to Dy 3+ . This effect can mainly be attributed to the nature of the lanthanide elements; the synthesis conditions have only secondary roles. − …”

Section: Resultsmentioning

confidence: 99%

Rare-Earth Zirconate Ln₂Zr₂O₇ (Ln: La, Nd, Gd, and Dy) Powders, Xerogels, and Aerogels: Preparation, Structure, and Properties

et al. 2019

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The physicochemical properties of rare-earth zirconates can be tuned by the rational modification of their structures and phase compositions. In the present work, La 3+ -, Nd 3+ -, Gd 3+ -, and Dy 3+ -zirconate nanostructured materials were prepared by different synthetic protocols, leading to powders, xerogels, and, for the first time, monolithic aerogels. Powders were synthesized by the co-precipitation method, while xerogels and aerogels were synthesized by the sol−gel technique, followed by ambient and supercritical drying, respectively. Their microstructures, thermogravimetric profiles, textural properties, and crystallographic structures are reported. The co-precipitation method led to dense powders (S BET < 1 m 2 g −1 ), while the sol−gel technique resulted in large surface area xerogels (S BET = 144 m 2 g −1 ) and aerogels (S BET = 168 m 2 g −1 ). In addition, the incorporation of lanthanide ions into the zirconia lattice altered the crystal structures of the powders, xerogels, and aerogels. Single-phase pyrochlores were obtained for La 2 Zr 2 O 7 and Nd 2 Zr 2 O 7 powders and xerogels, while defect fluorite structures formed in the case of Gd 2 Zr 2 O 7 and Dy 2 Zr 2 O 7 . All aerogels contain a mixture of cubic and tetragonal ZrO 2 phases. Thus, a direct effect is shown between the drying conditions and the resulting crystalline phases of the nanostructured rare-earth zirconates.

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Section: Resultsmentioning

confidence: 99%

Rare-Earth Zirconate Ln₂Zr₂O₇ (Ln: La, Nd, Gd, and Dy) Powders, Xerogels, and Aerogels: Preparation, Structure, and Properties

et al. 2019

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Influence of Calcination Temperatures on the Morphology and Specific Surface Area Development of ZrO2-CeO2-Y2O3-Al2O3 Powders Obtained via Sol-Gel Route

Nakonieczny

Paszenda

Majewska

et al. 2017

Innovations in Biomedical Engineering

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Current transfer processes in a hydrated layer localized in a two-layer porous structure of nanosized ZrO2

Bacherikov

Lytvyn

Mamykin

et al. 2022

J Mater Sci: Mater Electron

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Formation of metastable tetragonal zirconia nanoparticles: Competitive influence of the dopants and surface state

Cited by 20 publications

References 27 publications

Rare-Earth Zirconate Ln₂Zr₂O₇ (Ln: La, Nd, Gd, and Dy) Powders, Xerogels, and Aerogels: Preparation, Structure, and Properties

Rare-Earth Zirconate Ln₂Zr₂O₇ (Ln: La, Nd, Gd, and Dy) Powders, Xerogels, and Aerogels: Preparation, Structure, and Properties

Influence of Calcination Temperatures on the Morphology and Specific Surface Area Development of ZrO2-CeO2-Y2O3-Al2O3 Powders Obtained via Sol-Gel Route

Current transfer processes in a hydrated layer localized in a two-layer porous structure of nanosized ZrO2

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Formation of metastable tetragonal zirconia nanoparticles: Competitive influence of the dopants and surface state

Cited by 20 publications

References 27 publications

Rare-Earth Zirconate Ln2Zr2O7 (Ln: La, Nd, Gd, and Dy) Powders, Xerogels, and Aerogels: Preparation, Structure, and Properties

Rare-Earth Zirconate Ln2Zr2O7 (Ln: La, Nd, Gd, and Dy) Powders, Xerogels, and Aerogels: Preparation, Structure, and Properties

Influence of Calcination Temperatures on the Morphology and Specific Surface Area Development of ZrO2-CeO2-Y2O3-Al2O3 Powders Obtained via Sol-Gel Route

Current transfer processes in a hydrated layer localized in a two-layer porous structure of nanosized ZrO2

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Rare-Earth Zirconate Ln₂Zr₂O₇ (Ln: La, Nd, Gd, and Dy) Powders, Xerogels, and Aerogels: Preparation, Structure, and Properties

Rare-Earth Zirconate Ln₂Zr₂O₇ (Ln: La, Nd, Gd, and Dy) Powders, Xerogels, and Aerogels: Preparation, Structure, and Properties