Preparation of CeO2/TiO2 bilayer nanoparticle coating on ZrO2 fibers for thermal radiation shielding applications

• Published in: Materials today communications 2023-12, Vol.37, p.107480, Article 107480
• Main Authors: Gan, Xinzhu, Wang, Zhigang, Tian, Bin, Xu, Yong, Li, Ling, Xu, Rongfu
• Format: Article
• Language: English
• Subjects: Double-layer coating; Effective specific extinction; Thermal radiation shielding; ZrO2 fibers
• ISSN: 2352-4928; 2352-4928
• DOI: 10.1016/j.mtcomm.2023.107480

In this study, a solvothermal method was utilized to fabricate a CeO2/TiO2 bilayer coating on ZrO2 fibers without the use of seed layers. The crystalline morphology, composition, and microstructural characteristics of the bilayer coating were investigated using XRD, Raman, EDS-mapping, SEM, TEM and XPS techniques. The effectiveness of the bilayer coating in shielding infrared radiation was evaluated through the utilization of reflectance and effective specific extinction coefficient (e*). When a dual-layer coating was applied, the fiber's e* underwent a significant enhancement within the wavelength range of 2.5–8 µm, with a maximum increase of 76.13 %. The study showcased that, with nearly identical thickness conditions, the bilayer CeO2/TiO2 coating outperformed both the single-layer TiO2 coating and the single-layer CeO2 coating in terms of infrared light-blocking performance. Furthermore, the bilayer structure demonstrated outstanding heat resistance, withstanding temperatures of up to 1200 ℃. This exceptional thermal stability positions it as a highly favorable choice for applications requiring infrared opacity in high-temperature environments. [Display omitted]