CERAMICS INTERNATIONAL
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2024
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IF 5.1
Zhengdong Li,Xueying Zhang,Liwen Yan,Haiyan Du,Anran Guo,Ying Mu,Jiachen Liu
High emissivity coatings on hypersonic vehicle surfaces dissipate heat by emitting thermal radiation. While the difficulty of increasing emissivity limits the performance of coatings to improve heat-dissipation of the thermal insulation felt. Herein, a novel high-reflectivity and high-emissivity integrated double-layer coating was developed to enhance the thermal insulation performance of the alumina fiber fabric. The coating comprised of TiO 2 @SiO 2 (T@S) as reflective agent and ZrO 2 /SiC w (ZSC) as emittance agents, was applied on the surface of alumina fiber fabric (AFF). The reflecting effect of radiation heat from the high reflective agent enhanced the thermal insulation properties of the double-layer coating. In the wavelength range of 0.4–2.5 μm, the average emissivity of the ZSC coating was 0.83 and the average reflectivity of the T@S coating was 0.63. With continuous heating at 1400 °C for 10 min with a butane torch, the temperature on the backside of the T@S–ZSC-coated AFF remained relatively stable at 225 °C, which is notably decreased by 80 °C compared to that of the single-layer ZSC-coated AFF. The tensile strength of AFF with T@S–ZSC coating reached 35 MPa after being heat treated at 1200 °C. Moreover, the bonding strength between the coating and the AFF substrate was measured to be 0.15 MPa. The double-layer coating with high emissivity and reflectivity, along with a flexible AFF substrate, offers a promising solution for addressing the challenging of surface heat-dissipation in hypersonic vehicles.
研究领域:
材料科学
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航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
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IF 5.532
Pengda Han,Jiansen Zhao,Mengyu Jiao,Jiangtao Li,Linlin Guo,Shuo Yang,Xiaoxia Hu,Haiyan Du
The reaction or tight bonding between thermal insulation coating and the base ceramic fiber cloth is the main reason of the cloth embrittlement and failure. In this paper, the sacrificial interface layer is applied on aluminosilicate fiber cloth to inhibit the reaction between SiC-MoSi 2 -SiB 6 high emissive coating and the cloth. The sacrificial interface layer will be pyrolyzed at high temperature. The obtained space effectively prevents the glass formed by oxidation or melting of high emissive coating from contacting or reaction with the fibers in the cloth. The influence of different thickness of the middle layer and external coating on the micro morphology and mechanical properties of the fiber cloth was comprehensively compared and studied. The reusable performance of the coating was evaluated. The tensile strength of the fiber cloth with the optimized interface layer and external coating is about 40 MPa after heat treatment at 1300 °C for 1 h, which is 71.2% higher than that of the bare cloth; the tensile strength of the sample with only the outer coating and no intermediate layer is only 10 MPa after heat treatment at 1200 °C for 1 h. The bonding strength of the coating will not be obviously reduced by the application of sacrificial interface layer. By means of the interface layer the thermal shock resistance of the coating is improved. After 10 thermal shock cycles, the coating with a suitable interface layer is not cracking and spalling, and the bonding strength of it is as high as 125 kPa, the tensile strength is still as high as 20 MPa.
研究领域:
材料科学
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涂层技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Yunjia Xue,Zhe Huang,Xukun Yang,Jinfeng Zhao,Hengrui Zhang,Guanglu Zhang,Anran Guo,Liwen Yan,Feng Hou,Jiachen Liu
To prepare a coating with a high emissivity and low solar absorption ratio on the surface of aluminum silicate fiber cloth, the sol-gel method was used with silica sol as a binder. In this study, the effects of two white fillers, titanium oxide and zirconia, on the substrate and radiation properties of coatings were compared after heat treatment at 800–1200 °C. The ZrO 2 -based coating had good stability after heat treatment at 800–1200 °C, and maintained its white color, exhibiting solar absorption ratio of approximately 0.14 and emissivity of 0.84. ZrO 2 -based coatings prevented harmful cracking, as observed for the TiO 2 -based coatings after heat treatment, because of the ZrO 2 phase transformation. The ZrO 2 -based coating did not have strong bonding with the substrate, and the substrate strength was improved by maintaining a weak bonding interface. Compared with the TiO 2 -based coatings, which exhibit reduced substrate strength above 1000 °C, the ZrO 2 -based coating was more suitable for the surface of flexible fiber cloths as a temperature-resistant coating with good development prospects.
研究领域:
材料科学
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涂层技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Qu Wang,Senwang Yan,Qiang Gu,Yaming Li,Gang Wang,Hongxia Li,Lei Yuan
The development of infrared radiation materials, which combine high emissivity, excellent thermal stability, and low cost, is vital for energy-efficient operation in high-temperature industrial settings. Non-oxide high-emissivity materials are susceptible to oxidation at elevated temperatures, resulting in degradation of emissivity; Oxide-based high-emissivity materials offer superior stability in high-temperature environments, but often exhibit inadequate emissivity. In this study, a high-entropy spinel ceramic, (CrCoFeMnNi) 3 O 4 (HES), was synthesized via a cost-effective solid-state method. The HES ceramic exhibited high emissivity of 0.875 in the wavelength range of 0.76–2.5 μm and 0.861 in the wavelength range of 2.5–14 μm. Moreover, it demonstrated excellent thermal stability following heat treatment at 1300 °C for 30 h in air. Applied as a coating to corundum crucibles, HES coating elevated the internal equilibrium temperature by more than 42 °C and increased the heating rate from 2.65 to 2.89 °C/min. These findings demonstrate the promising potential of HES ceramic for next-generation thermal management coating in energy-intensive industries such as metallurgy, ceramics manufacturing, and high-temperature processing.
研究领域:
材料科学
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陶瓷
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热工工程
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能源效率
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红外技术
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Energy
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2024
·
IF 9
Xiao-Jie Kang,Hui Zhang,Cheng-Yu He,Bao-Hua Liu,Yong-Zhi Zhang,Xiang-Hu Gao
Polymer-based materials emerge as promising building blocks for passive daytime radiative cooling (PDRC) due to their affordability and ease of production. Enhancing these polymers with inorganic particle doping has shown to boost their mechanical properties and light scattering ability, a result of the increased refractive index contrast with air. However, the incorporation of a single type of inorganic particle often falls short in optimizing overall performance. Herein, we introduce a novel approach by simultaneously integrating high refractive index zirconium dioxide (ZrO 2 ) and wide band gap silicon dioxide (SiO 2 ) dielectric particles into polydimethylsiloxane (PDMS) matrix. This dual-particle strategy synergistically improves the radiative cooling capabilities of the resulting photonic film. Remarkably, with a thickness of 1,000 μm, it achieves an impressive 96.7% reflection of solar irradiance , while maintaining a high emissivity of 95.2% in the atmospheric window . Under solar intensity of ∼836.7 W/m 2 , it delivers an average cooling power of 82.42 W/m 2 , achieving a substantial sub-ambient temperature drop of up to 8.26 °C. We further explored its effectiveness in enhancing freshwater collection efficiency, leveraging its radiative cooling properties. Furthermore, the photonic film also exhibits versatile properties including flexibility, hydrophobicity , thermal stability, color scalability, and weather resistance, thus enhancing its suitability for various practical applications.
研究领域:
材料科学
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光学
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纳米技术
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高分子科学
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热能工程
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光子学
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能源效率
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）