High-entropy oxide optical nanoceramics prepared by thermobaric synthesis

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2025-02-20 DOI:10.1016/j.jeurceramsoc.2025.117316

A.N. Kiryakov , Yu.A. Kuznetsova , E.A. Buntov , T.V. Dyachkova , J. Murugan , A.Yu. Chufarov , A.P. Tyutyunnik

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引用次数: 0

Abstract

The study presents the synthesis and characterization of high-entropy optical nanoceramics with the composition (Y₀.₂La₀.₂Gd₀.₂Eu₀.₂Er₀.₂)₂O₃, prepared via thermobaric pressing of nanopowders. A comprehensive analysis of the structural and morphological properties, as well as the chemical composition, was performed. Photoluminescence (PL) studies revealed a significant enhancement in the emission intensity of the red spectral range compared to the nanopowder. This enhancement is associated with reduced symmetry around the Eu³ ⁺ ions caused by lattice distortions due to the formation of impurity phases, as well as anionic defects. Optical transmission measurements show that the nanoceramics exhibit transparency of up to 70 % in the visible range, with an optical band gap of 5.77 eV. The increased PL quantum yield, calculated at over 50 % on the basis of measured optical properties, suggests the potential of these nanoceramics as red-emitting materials for optoelectronic applications. The study highlights the influence of configurational entropy and defect engineering on the optical performance of high-entropy oxides, providing a foundation for further exploration in photonic applications.

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.