Study on the thermal insulation property of lanthanum–cerium oxide coatings

IF 2.4 4区材料科学 Q3 MATERIALS SCIENCE, COATINGS & FILMS

Surface Engineering Pub Date : 2024-05-24 DOI:10.1177/02670844241255791

S. Zeng, Zhoufu Wang, Yan Ma, Hao Liu, Xitang Wang

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Abstract

Functional fillers with low thermal conductivity and high near-infrared reflectance play a vital role in high temperature thermal insulation coatings and make an outstanding contribution to achieving efficient comprehensive thermal insulation. In this work, the thermal insulation and bonding properties of lanthanum–cerium oxide (LCO) coatings were regulated by composition design. The effects of the La/Ce mole ratio on phase composition, the thermal conductivity and near-infrared reflectivity of LCO coatings were investigated systematically. The results showed that coating with a La/Ce mole ratio of 1:1 possess the excellent thermal insulation properties (ΔT ≈ 115°C) due to the formation of a LCO solid solution and a lanthanum phosphate mesophase with low thermal conductivity and high near-infrared reflectivity. In addition, the mortise and tenon structure was formed between the coating and the substrate, which led to the remarkable bonding properties. The LCO coating offers excellent thermal insulation properties and broad application prospects in the fields of high temperature and energy conservation.

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氧化镧铈涂层的隔热性能研究

具有低热导率和高近红外反射率的功能填料在高温隔热涂料中发挥着重要作用，为实现高效的全面隔热做出了突出贡献。本研究通过成分设计来调节氧化镧铈（LCO）涂层的隔热性能和粘结性能。系统研究了 La/Ce 摩尔比对 LCO 涂层相组成、热导率和近红外反射率的影响。结果表明，La/Ce 摩尔比为 1:1 的涂层具有优异的隔热性能（ΔT ≈ 115°C），这是由于形成了 LCO 固溶体和具有低导热率和高近红外反射率的磷酸镧介相。此外，涂层与基材之间形成了榫卯结构，从而产生了显著的粘合性能。LCO 涂层具有优异的隔热性能，在高温和节能领域具有广阔的应用前景。

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来源期刊

Surface Engineering 工程技术-材料科学：膜

CiteScore

5.60

自引率

14.30%

发文量

审稿时长

2.3 months

期刊介绍： Surface Engineering provides a forum for the publication of refereed material on both the theory and practice of this important enabling technology, embracing science, technology and engineering. Coverage includes design, surface modification technologies and process control, and the characterisation and properties of the final system or component, including quality control and non-destructive examination.