Nanocrystalline Pyrochlore Ce2Zr2O7 and κ-Ce2Zr2O8 Phases with High Specific Surface Area Prepared via a Carbon-Shell Approach Full article
| Journal |
Materials Letters
ISSN: 0167-577X , E-ISSN: 1873-4979 |
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| Output data | Year: 2026, Volume: 409, Article number : 140209, Pages count : 4 DOI: 10.1016/j.matlet.2026.140209 | ||
| Tags | Carbon-shell synthesis; pyrochlore Ce2Zr2O7; κ-Ce2Zr2O8; zirconium carbide | ||
| Authors |
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| Affiliations |
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Funding (1)
| 1 |
Russian Science Foundation Министерство науки и инновационной политики Новосибирской области |
25-23-20117 |
Abstract:
This paper reports a new approach for the synthesis of the Y- and La-substituted nanocrystalline pyrochlore phase (pyr-Ce2Zr2O7). To prevent the sintering of the particles during the high-temperature reduction, the pristine material t-Zr0.45Ce0.45Y0.05La0.05O2 was synthesized in a carbon shell. The subsequent re-oxidation of the obtained phase under mild conditions resulted in its transformation into nanocrystalline κ-Ce2Zr2O8. Thus, it was demonstrated that the use of a carbon-shell approach enables the size stabilization of the oxide particles. At a synthesis temperature of 1400 °C and a duration of 6 h, the content of the pyrochlore-type cation ordering phase was about 60 wt%. Its specific surface area was as high as 74 m2/g, and the crystallites were of ~15 nm in size. The highly dispersed pyr-Ce2Zr2O7+δ phase possesses a higher average oxidation state under atmospheric conditions compared to the bulk pyr-Ce2Zr2O7+δ phase synthesized by the conventional technique.
Cite:
Stoyanovskii V.O.
, Vedyagin A.A.
Nanocrystalline Pyrochlore Ce2Zr2O7 and κ-Ce2Zr2O8 Phases with High Specific Surface Area Prepared via a Carbon-Shell Approach
Materials Letters. 2026. V.409. 140209 :1-4. DOI: 10.1016/j.matlet.2026.140209 OpenAlex
Nanocrystalline Pyrochlore Ce2Zr2O7 and κ-Ce2Zr2O8 Phases with High Specific Surface Area Prepared via a Carbon-Shell Approach
Materials Letters. 2026. V.409. 140209 :1-4. DOI: 10.1016/j.matlet.2026.140209 OpenAlex
Dates:
| Submitted: | Dec 17, 2025 |
| Accepted: | Feb 2, 2026 |
| Published online: | Feb 3, 2026 |
| Published print: | Apr 15, 2026 |
Identifiers:
| ≡ OpenAlex: | W7127330001 |
Citing:
| ≡ OpenAlex | Нет цитирований | Сбор данных от 08.02.2026 |