Fabrication and characterization of Pr6O11-HfO2 ultra-high temperature infrared radiation coating

Liu, Fusheng; Mao, Jiawei; Li, Shuhao; Shao, Hao; Liu, Tongzhi; Yamaguchi, Tomiko; Zeng, Xian

doi:10.1016/j.jeurceramsoc.2019.06.004

Cited by 35 publications

(12 citation statements)

References 30 publications

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“…Notably, the HE design effectively addressed the limitations of traditional spinel oxides and many other IR radiation materials that suffer from low emissivity in this band. [ 29,37,39,58–60 ] In the 2.5−16 µm wavelength range, the IR emissivity (0.877) of the HE MCFCCO was also markedly superior to that of other multi‐metal spinel oxides fabricated in this work, nearly three times higher than that (0.284) of standard MCO. These findings demonstrate the efficacy of the HE approach for enhancing broadband radiation performance in conventional spinel oxides.…”

Section: Resultsmentioning

confidence: 70%

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High‐Entropy Engineering for Broadband Infrared Radiation

Wang

Liu

et al. 2023

Adv Funct Materials

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Developing high‐performance infrared (IR) radiation materials with desired broadband emissivity, excellent thermal stability, and scalable fabrication processes is highly desirable for energy‐saving applications and heat dissipation. However, it remains a grand challenge to concurrently meet these requirements in existing IR radiation materials. Herein, a high‐entropy (HE) approach is employed to advance the IR radiation performance of spinel oxide. This strategy efficiently narrows the bandgap due to the enhanced electron transitions and the introduction of oxygen vacancies (Ov), variable‐valence behavior, and orbital hybridization. In addition, the lattice distortion effect lowers the symmetry of lattice vibration. Therefore, the resulting HE spinel oxide exhibits near‐blackbody radiation performance, with its emissivity approximately three times higher than that of the binary spinel oxide. Moreover, the entropy‐dominating phase stabilization effect contributes to impressive thermal stability (stable at 1300 °C for 100 h). This makes it suitable for high‐temperature thermal radiation applications, such as energy conservation in industrial high‐temperature furnaces. More importantly, the HE spinel oxide can be readily spray‐coated on various substrates. And the coating on stainless steel reaches an outstanding emissivity of 0.943 in the 0.78−16 µm wavelength range. All these merits render the HE approach competitive for the development of high‐emissivity and thermally stable thermal radiation materials.

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Section: Resultsmentioning

confidence: 70%

“…These disorders lead to lattice distortion and the detachment of lattice oxygen, ultimately forming O v . [ 59 ] Figure 4h shows a schematic representation of the generation of lattice distortion and O v during the high‐temperature synthetic process.…”

Section: Resultsmentioning

confidence: 99%

High‐Entropy Engineering for Broadband Infrared Radiation

Wang

Liu

et al. 2023

Adv Funct Materials

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“…It has been reported that the total emissivity ε can be calculated from spectral emissivity by the integral method in a given wavelength range: where λ 1 and λ 2 are the wavelengths, R s (λ) is the spectral reflectance, E b (λ) is the emission intensity of the spectral blackbody, and dλ is the difference of adjacent wavelengths. In this condition, the total emissivity values of the HEO powder are 0.879 and 0.848 in the wavelength ranges of 0.78–2.5 and 2.5–16 μm, respectively.…”

Section: Results and Discussionmentioning

confidence: 99%

Entropy-Assisted High-Entropy Oxide with a Spinel Structure toward High-Temperature Infrared Radiation Materials

Guo

Wang

et al. 2021

ACS Appl. Mater. Interfaces

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Developing advanced materials with a high-entropy concept is one of the hot trends in materials science. The configurational entropy of high-entropy materials can be tuned by introducing different atomic species, which can also impart a result in excellent physical and chemical properties. In this work, we synthesized a solid-solution oxide (Cu, Mn, Fe, Cr) 3 O 4 by a simple and scalable solid-phase synthesis method. We extensively investigated the microstructure and chemical composition, indicating that (Cu, Mn, Fe, Cr) 3 O 4 has a single-phase spinel structure. Simultaneously, we reasonably evaluated the position occupied by the elements of (Cu, Mn, Fe, Cr) 3 O 4 in a spinel structure as (Cu 0.75 Fe 0.25 )(Fe 0.25 Cr 0.375 Mn 0.375 ) 2 O 4 . Here, we first evaluated the infrared radiation performance of (Cu, Mn, Fe, Cr) 3 O 4 . The new, high-entropy oxide (HEO) (Cu, Mn, Fe, Cr) 3 O 4 powder exhibits high infrared emissivity values of 0.879 and 0.848 in the wavelengths of 0.78−2.5 and 2.5−16 μm, respectively, and has excellent thermal stability. More importantly, the infrared emissivity values of as-prepared HEO coating reach 0.955 (0.78−2.5 μm) at room temperature and 0.936 (3−16 μm) at 800 °C. This work provides a viable strategy toward the laboratory mass production of this HEO for infrared radiation materials, which shows great potential in the energy-related applications.

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“…In view of less pollution and energy conservation, infrared heating and drying technique is being utilized in many industries. Hereby, high infrared radiation materials, as the main component of infrared radiation coatings, have been widely applied in high‐temperature furnaces, infrared heaters, aerospace fields, and electronic and electrical industries due to their excellent radiation power, durability to high‐temperature oxidation, and high infrared emissivity 3–5 . As a consequence, there is an increasing demand for high infrared emissivity materials.…”

Section: Introductionmentioning

confidence: 99%

Band gap and oxygen vacancy engineering of honeycomb‐like CuFe₂O₄ spinels toward enhanced high infrared emissivity

et al. 2023

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Recently, copper ferrites have acquired widespread attraction in high infrared radiation fields owing to their remarkable cost efficiency. However, to achieve broader applications under various operating conditions, it is essential to further improve the infrared emissivity, particularly at high temperatures. Herein, the Ni‐doped CuFe2O4 (NCFO) honeycomb‐like frameworks, which are constructed with single‐crystal nano‐subunits, are successfully fabricated via the scalable sol–gel avenue. The unique porous honeycomb framework endows NCFO with enhanced infrared absorption and relieves the stress between coatings and substrates meanwhile. With both band gap and oxygen vacancy (OV) engineering of CuFe2O4 itself via smart Ni doping, a maximum lattice strain, the richest OVs, and the narrowest band gap (∼1.63 eV) are simultaneously achieved for the CuFe2O4 with 15% Ni doping (denoted as CNFO‐15). Benefiting from the synergy of these external and intrinsic contributions, the CNFO‐15 possesses an ultrahigh infrared emissivity (∼0.975) in the wavelength range of 3–5 µm at a test temperature of 800°C. Moreover, the CNFO‐15‐based coating displays superior infrared radiation performance with outstanding high‐temperature resistance. More meaningfully, the constructive design here will provide a distinctive perspective for future large‐scale fabrication of advanced high‐infrared‐emissivity coatings.

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Fabrication and characterization of Pr6O11-HfO2 ultra-high temperature infrared radiation coating

Cited by 35 publications

References 30 publications

High‐Entropy Engineering for Broadband Infrared Radiation

High‐Entropy Engineering for Broadband Infrared Radiation

Entropy-Assisted High-Entropy Oxide with a Spinel Structure toward High-Temperature Infrared Radiation Materials

Band gap and oxygen vacancy engineering of honeycomb‐like CuFe₂O₄ spinels toward enhanced high infrared emissivity

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Fabrication and characterization of Pr6O11-HfO2 ultra-high temperature infrared radiation coating

Cited by 35 publications

References 30 publications

High‐Entropy Engineering for Broadband Infrared Radiation

High‐Entropy Engineering for Broadband Infrared Radiation

Entropy-Assisted High-Entropy Oxide with a Spinel Structure toward High-Temperature Infrared Radiation Materials

Band gap and oxygen vacancy engineering of honeycomb‐like CuFe2O4 spinels toward enhanced high infrared emissivity

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Band gap and oxygen vacancy engineering of honeycomb‐like CuFe₂O₄ spinels toward enhanced high infrared emissivity