High entropy (LaCeSmEuNd)2Zr2O7 ceramic aerogel with low thermal conductivity and excellent structural heat resistance

Liu, Xuening; Su, Congxuan; Zhong, Ya; Zhu, Xiaofei; Wu, Zhanwu; Cui, Sheng

doi:10.1016/j.jeurceramsoc.2022.06.075

Cited by 19 publications

(4 citation statements)

References 54 publications

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“…At the same temperature, the thermal diffusivity of the ceramics sintered using ThO 2 NC-B exceeds that of the ceramics prepared using ThO 2 NC-A. In general, the thermal conductivity of ceramics reduces due to porosity. , However, higher thermal conductivity may be achieved at higher porosity owing to radiative heat transfer . The pore size of ThO 2 ceramics fabricated using ThO 2 NC-A is on a nanometer scale.…”

Section: Resultsmentioning

confidence: 96%

Synthesis of Thorium Dioxide Nanocrystals via Molten Salt Thermal Decomposition for Nuclear Energy-Related Applications

Zhang

Qian

Liu

et al. 2022

ACS Appl. Nano Mater.

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In addition to uranium, thorium is a vital nuclear element that has broad potential for future nuclear energy applications. Herein, we report the synthesis of cubic structured ThO2 nanocrystals (NCs) based on the decomposition of their nitrate salt in air and in a molten salt medium. Both the processes yield pure ThO2 NCs with average sizes of <100 nm. The ThO2 NCs synthesized in the molten salt medium exhibit better crystallinity and a larger average size of ∼75.1 nm with a narrow size distribution owing to the high-temperature liquid growth environment. The ceramic sintered from the salt-derived ThO2 NCs exhibits a considerably higher relative density of 94.6% and similar thermal properties compared with the ceramic fabricated from fine nanopowders (<10 nm) obtained from direct thermolysis of metal nitrate. This study shows that thermal decomposition in a molten salt medium could be an efficient method for producing highly crystalline metal-oxide NCs of thorium-based fuels used in nuclear energy applications.

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Section: Resultsmentioning

confidence: 96%

Synthesis of Thorium Dioxide Nanocrystals via Molten Salt Thermal Decomposition for Nuclear Energy-Related Applications

Zhang

Qian

Liu

et al. 2022

ACS Appl. Nano Mater.

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“…f,g) Diameter shrinkage, thermal conductivity and compressive strength of (LaCeSmEuNd) 2 Zr 2 O 7 and La 2 Zr 2 O 7 at 25 °C. [ 173 ] Copyright 2022, Elsevier. h–j) SEM image, BET surface, and thermal diffusivity of the sintered (Zr 0.25 Ce 0.25 Hf 0.25 Y 0.25 )O 2‐δ ceramics.…”

Section: Potential Applications Of Heo Mnmsmentioning

confidence: 99%

“…successfully synthesized high‐entropy (LaCeSmEuNd) 2 Zr 2 O 7 ceramic aerogels through a non‐alcoholic salt sol–gel method, CO 2 supercritical drying, and sintering (Figure 11e). [ 173 ] The obtained ceramic showed a single‐phase crystal structure. And the successful synthesis of the aerogel structure was confirmed by SEM images.…”

Section: Potential Applications Of Heo Mnmsmentioning

confidence: 99%

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Challenges and Strategies for Synthesizing High Performance Micro and Nanoscale High Entropy Oxide Materials

Zhang,

Jia,

Yan

2024

Small

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High‐entropy oxide micro/nano materials (HEO MNMs) have shown broad application prospects and have become hot materials in recent years. This review comprehensively provides an overview of the latest developments and covers key aspects of HEO MNMs, by discussing design principles, computer‐aided structural design, synthesis challenges and strategies, as well as application areas. The analysis of the synthesis process includes the role of high‐throughput process in large‐scale synthesis of HEOs MNMs, along with the effects of temperature elevation and undercooling on the formation of HEO MNMs. Additionally, the article summarizes the application of high‐precision and in situ characterization devices in the field of HEO MNMs, offering robust support for related research. Finally, a brief introduction to the main applications of HEO MNMs is provided, emphasizing their key performances. This review offers valuable guidance for future research on HEO MNMs, outlining critical issues and challenges in the current field.

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Graphite-reinforced AgCuTi/Cu foam composite filler to braze Al2O3 ceramic and 304 stainless steel

Yang

Chen³

et al. 2023

Ceramics International

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High entropy (LaCeSmEuNd)2Zr2O7 ceramic aerogel with low thermal conductivity and excellent structural heat resistance

Cited by 19 publications

References 54 publications

Synthesis of Thorium Dioxide Nanocrystals via Molten Salt Thermal Decomposition for Nuclear Energy-Related Applications

Synthesis of Thorium Dioxide Nanocrystals via Molten Salt Thermal Decomposition for Nuclear Energy-Related Applications

Challenges and Strategies for Synthesizing High Performance Micro and Nanoscale High Entropy Oxide Materials

Graphite-reinforced AgCuTi/Cu foam composite filler to braze Al2O3 ceramic and 304 stainless steel

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