JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2024
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IF 5.8
Guangyang Wang,Shaobai Sang,Qinghu Wang,Yawei Li,Heng Wang,Tianbin Zhu
MgCr 2 O 4 is a potential infrared radiation material for high-temperature furnaces energy-saving. However, poisonous Cr 6+ is easily formed in MgCr 2 O 4 -based materials during the preparation process, which is harmful to the environment. In this study, TiO 2 -doped MgCr 2 O 4 materials were prepared at 1600 ℃ by solid-phase sintering method. The effects of TiO 2 as a dopant on the infrared radiation properties of MgCr 2 O 4 and the leaching concentration of Cr 6+ were investigated, and the mechanism was discussed. Results show that the emissivity of MgCr 2 O 4 in both near-infrared and mid-infrared bands is enhanced with the increase of TiO 2 content, and the specimen MgCr 1.6 Ti 0.4 O 4.2 has the highest average emissivity in the 0.8–2.5 μm and 2.5–10.0 μm bands, which are 0.82 and 0.87, respectively. Moreover, the addition of TiO 2 significantly reduces the Cr 6+ content of MgCr 2 O 4 , with the Cr 6+ removal rate of MgCr 1.6 Ti 0.4 O 4.2 up to 84.2 %.
研究领域:
材料科学
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能源工程
·
环境科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Tianhe Tian,Xuedian Wei,Ahmed Elhassan,Jianyong Yu,Zhaoling Li,Bin Ding
The infrared radiation heating textiles have attracted increasing attention aiming to address the warmth retention issue in cold weather. It still remains challenging to develop high-efficiency heating products with fast heating rate and stable heat generation. Here, a highly flexible, efficient, and wearable infrared radiation heating carbon fabric (CF) was rationally constructed using textile forming technique. Inspired by the biomimetic adhesion, the carbon fabric was chemically modified by dopamine to improve the interfacial activity on the fiber surface. Infrared radiation materials including tourmaline, ZrO 2 , and medical stone nanoparticles (NPs) were successfully introduced into the carbon fabric through interfacial adhesion. The permanent spontaneous polarization of both CF matrix and infrared radiation NPs can induce an enhanced current in the heater by creating an additional electrical field, benefiting to produce a fast electrothermal response and favorable heat preservation. It was found that 30% tourmaline@PDA@CF, 9% ZrO 2 @PDA@CF, and 15% medical stone@PDA@CF exhibited excellent heat generation performance among different samples with different ingredients. The temperature can be rapidly raised up from room temperature to 58.3 °C, 60 °C, 59.5 °C respectively for these three samples in 10 min under a voltage of 10 V. More importantly, the composite CF is highly shape adaptive and can be fully integrated into a neck guard or industrial carpet for real application. It is expected that this infrared radiation heating CF can be widely applied in the fields of personal warmth, physical therapy, biomedical treatment, and wearable flexible electronics.
研究领域:
材料科学
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纺织工程
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2024
·
IF 6.3
Jia Gao,Hainan Zhang,Xiangge Han,Shuhui Liang,Weiqi Zhou,Shuliang Dou,Jiazhi Wang,Yao Li
Dynamic infrared radiation has significantly contributed to thermal comfort by adaptively radiating heat into space without necessitating external energy consumption. This study introduces a novel approach to fabricate dynamic infrared radiation-regulated materials using VO 2 nanorods. The VO 2 nanorods were synthesized via a conventional hydrothermal method. XRD and SEM analyses confirmed the high crystallinity and uniform size of the VO 2 nanorods. HRTEM measurements revealed that the nanorods had an approximate length of 1 μm and a width of 100 nm. These nanorods were combined with KBr and pressed into a tablet form. Subsequent thermal imaging was conducted to assess their dynamic infrared radiation regulation capability. Remarkably, the optimized variation in emissivity for the VO 2 -based tablets reached up to 0.46. And the Mie scattering theory was used to interprete the insight mechanism. It seems that the Q abs of VO 2 nanorod before and after phase transition dominate the dynamic infrared radiation regulation ability at different temperatures. This finding offers a novel, straightforward, and highly efficient energy-saving solution for thermal management systems.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
DYES AND PIGMENTS
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2022
·
IF 5.122
Feifei Lu,Peiyu Tan,Dengfeng Ren,Yuge Han
Poly (aniline) (PANI) is considered an ideal material for the modulation of infrared (IR) radiation due to its excellent electrochromic properties. However, the camphorsulfonic acid doping mechanism which results in emittance modulation is not clearly understood. With the goal of enhancing the IR emittance variation (Δε), a PANI film was synthesized by a chemical oxidation and spraying method, and the doping mechanism of CSA concentration effect on Δε was studied by combining Raman spectra, X-ray photoelectron spectra and density functional theory calculations. The results demonstrate that with increasing camphorsulfonic acid concentration, the effect of the doping concentration on the emittance of PANI/Au films can be divided into two stages: (1) the change in the emittance is mainly caused by the shortening of optical penetration depth either under the state of dopant free (non-doped) or a low CSA doping concentration; (2) the change in emittance is mainly caused by the increase in reflectivity of the PANI layer under the increased doping. Due to the joint action of the two factors, the emittance of the PANI film first increases and then decreases with increasing concentration of CSA, and the maximum Δε (0.45) is realized at 1 M. This paper clarifies the mechanism of PANI films with different CSA dopant concentrations and could provide a way to increase the emittance modulation range by adjusting the concentration of the dopants.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Xuanxuan Hua,Xiaodi Mao,Shuang Yang,Meijie Zhang,Lvping Fu,Cangjuan Han,Ao Huang,Huazhi Gu
Typical infrared (IR) radiation materials, such as spinel structure with transition metal doping , remain challenges on IR radiation performance and thermal stability. Inspired by manipulatable entropy with desired properties, (Mg 1/5 Co 1/5 Ni 1/5 Cu 1/5 Zn 1/5 )Al 2 O 4 (5MAl 2 O 4 ) with improved infrared radiation property and reduced thermal conductivity has been successfully synthesized. High-entropy strategy significantly narrows the band gap by impurity energy level formation, resulting in an improved 0.91 (0.78–2.5 μm). Simultaneously, 5MAl 2 O 4 emerges site inversion (tetrahedral and octahedral sites) and lattice distortion which benefits the outstanding infrared emissivity of 0.94 (2.5–15 μm, measured at 800 °C). Furthermore, 5MAl 2 O 4 reaches fairly low thermal conductivity of 2.1 W·m −1 ·K −1 , 4–5 times decrease compared with MAl 2 O 4 end members. The remarkable infrared emissivity and low thermal conductivity offer great potential in energy conservation and heat dissipation.
研究领域:
材料科学
·
热能工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2023
·
IF 4.6
Enbo Li,Yu Bai,Peng Zhang,Hongxia Liu,Wen Ma,Yingwei Qi,Te Wang,Ziqian Zhang,Sinan Gao
Electronic structure adjustment on materials' surfaces often leads to materials obtaining novel performances. Flake Al powder is a classical low infrared emissivity material at room temperature. However, this powder shows intense infrared radiation over 500 °C due to its high-temperature oxidation , which restricts flake Al powder's application as low infrared radiation material in higher temperatures. For this reason, the Al@ZrO 2 composite was prepared by a solvothermal method to improve its thermostability. This composite can be used as low infrared radiation material over 500 °C for the long term, even at 700 °C for a short time. According to the experimental and theoretical investigation, a delocalization bond of Al–O–Zr is formed in the interface between the Al surface and ZrO 2 so that the Al surface's electronic structure is adjusted. This change of electronic structure weakens the electroaffinity of Al atoms to bond with the electron-rich groups, and the oxidation reaction of Al needs to proceed in a higher-temperature range. In this case, flake Al powder coating with ZrO 2 holds its metal properties with low infrared emissivity over 500 °C. The Al@ZrO 2 composite could be used in a higher temperature range as a low infrared radiation material.
研究领域:
材料科学
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表面工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
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IF 8.456
Runcai Xiao,Chengyi Hou,Weifeng Yang,Yun Su,Yaogang Li,Qinghong Zhang,Peng Gao,Hongzhi Wang
Extreme heat events are mainly responsible for weather-related human mortality due to climate change. However, there is a lack of outdoor thermal management for protecting people from extreme heat events. We present a novel infrared-radiation-enhanced nanofiber membrane (NFM) that has good infrared resonance absorption and selectively radiates thermal radiation of the human body through the atmosphere and into the cold outer space. The NFM comprises polyamide 6 (PA6) nanofibers and randomly distributed SiO2 submicron spheres and has sufficient air permeability and thermal–moisture comfortability because of its interconnect nanopores and micropores. We measure the sky radiative cooling performance under a clear sky, and PA6/SiO2 NFM produces temperatures that are about 0.4–1.7 °C lower than those of commercial textiles when covering dry and wet hands and temperatures 1.0–2.5 °C lower than the ambient temperature when thermal conduction and convection are isolated in a closed device. Our processed PA6/SiO2 NFM combines sky radiative cooling with thermal management of the human body very well, which will promote the development of radiative cooling textiles.
研究领域:
材料科学
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环境科学
·
纺织工程
✓ 已验证
DOI
高影响因子
Nano Energy
·
2024
·
IF 16.8
Shangjing Li,Erqi Yang,Yiyi Li,Xiwei Mo,Zewen Chen,Zhengui Zhou,Guangming Tao,Yi Long,Bin Hu
Effective management of both near-infrared (NIR) radiation and long-wavelength infrared (LWIR) thermal emission through window design holds tremendous promise for achieving carbon neutrality in the building sector. Compared to the traditional static low emissivity (Low-E) and solar regulating windows, emerging emissivity-altering windows can better adapt to varied weather. However, dynamic windows with self-adaptive solar radiation and emissivity control have long been challenging, primarily due to the intricate broadband spectrum manipulation requiring sophisticated material design. Herein, by employing the NIR transparent hydrogen-doped In 2 O 3 (IHO) as a function layer ( ε = 0.13, T NIR = 79.8 %), we present a broadband self-adaptive radiative thermal management (SRTM) window based on Fabry-Perot resonator. Compared to the common tin-indium oxide (ITO)-based counterpart, the IHO-based SRTM window shows a 70 % enhancement in NIR power regulation ability (10.9 %) with remaining emissivity regulation ability (0.26). It contributes significantly to energy conservation offering an annual energy saving and equivalent CO 2 emissions reduction of up to 20 % (411 MJ·m −2 ) and 244 tons/yr, compared to traditional Low-E windows globally.
研究领域:
材料科学
·
建筑技术
·
能源工程
✓ 已验证
DOI
高影响因子
MATERIALS CHARACTERIZATION
·
2025
·
IF 5.5
Bin Tian,Xinzhu Gan,Zhigang Wang,Yong Xu,Lin Wang,Conghe Xu,Ling Li
In this study, TiO 2 nanosheets were directly grown on ZrO 2 fibers by employing a solvothermal technique without requiring a TiO 2 seed layer, targeting thermal radiation shielding applications. The crystalline form and microstructure of the TiO 2 nanosheets were characterized using SEM, Raman, XRD, XPS, and TEM. The infrared thermal radiation extinction properties of the TiO 2 nanosheets were evaluated using DRS and effective specific extinction coefficient ( e *), and their thermal endurance at high temperatures was also assessed. The results showed that, within the infrared band of 2.5 to 8.5 μm, the TiO 2 nanosheet arrays with a thickness of 423 nm enhanced the e* of ZrO 2 fibers by 58.59 %. At similar coating thicknesses, nanosheet coatings exhibited superior thermal radiation shielding performance compared to nanoparticle coatings. These findings suggest that ZrO 2 fibers loaded with TiO 2 nanosheets are promising candidates for thermal radiation shielding in aerogels or extreme environmental conditions.
研究领域:
材料科学
·
热防护技术
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2019
·
IF 6.669
Yuan Zhang,Liping Kang,Hongmei Li,Xianzhang Huang,Xiaoyu Liu,Lanping Guo,Luqi Huang
The combustion of moxa floss was investigated by thermogravimetric/differential scanning calorimeter (TG/DSC), thermogravimetric/Fourier transform infrared spectroscopy (TG-FTIR) and an infrared radiation spectrum-detecting system. The average mass loss rate at the major stage of combustion was 1.08%/min with a peak at 7.86%/min. Moxa floss burning released the integral heat of 9188 mJ/mg from the temperature of 200 °C to 500 °C. The peak heat flow during char combustion stage was higher than those of other stages. The results indicated the combustion of moxa floss was a mild and slow process, releasing heat continuously and steadily. The infrared radiation spectra of burning moxa stick were in a range of 2.5–13.0 µm and showed double peaks at 3.75 µm and 8.75 µm. Thus, this study provided insight into why moxa floss biomass is the optimal material for thermal therapy and is beneficial for the development of electric thermal stimulation alternative.
研究领域:
热疗研究
·
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SOLAR ENERGY
·
2021
·
IF 5.742
Yueying Li,Yan Ma,Wenyuan liu,Zhoufu Wang,Hao Liu,Xitang Wang,Hengyong Wei,Shenghao Zeng,Nian Yi,Gary J. Cheng
The colored non-toxic near-infrared (NIR) reflective and infrared radiative pigments are desired in reducing the energy consumption of buildings. In this work, yttrium ferrite (YFeO 3 ) pigments with controllable crystalline structure were successfully synthesized via the method of solid-state reaction at low-heating temperature. The effects of the crystalline structure and microstructure, especially charge state distribution, on the bandgap, chromatic properties, infrared reflection and radiation performance of YFeO 3 pigments were investigated for the first time. With the calcining temperature increased, the structure of obtained pigments changed from hexagonal to orthorhombic, and the bandgap was obviously widened. The black hexagonal YFeO 3 pigments possessed small particle size, and their intensive optical absorption in the NIR range was related to the noticeable multiple reflections induced by the grain boundary. While, the brown orthorhombic YFeO 3 powdered pigments, as well as the corresponding pigmented coatings, possessed good NIR reflection characteristics, and the high solar reflectance values clearly highlight the potential of these pigments as cool pigments. In addition, the obtained YFeO 3 pigmented coatings showed high emissivity in 8–14 μm waveband (atmospheric window), indicating their potential applications in energy saving of buildings by combining NIR shielding and space cooling. The larger amount of Fe 2+ -Fe 3+ ions pairs in the orthorhombic pigments led to the enhancement of free carrier absorption, which enhanced infrared emission and contributed to the slightly decreased NIR reflectance.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
Advanced Optical Materials
·
2024
·
IF 8
Qingyuan Zhao,Shuqi Wang,Guoliang Chen,Yifan Sun,Yongchun Zou,Enyu Xie,Zijian Peng,Junteng Yao,Ouyang Jiahu,Yaming Wang,Dechang Jia,Yu Zhou
As the thrust-weight ratios of aero-engines increase, the severe thermal radiation emitted by high-temperature gases (≥1800 K) poses a significant challenge for thermal barrier coating (TBC) materials. Traditional TBC materials, despite their reliable thermal insulation properties, are nearly transparent to infrared radiation, which leads to direct radiative heating of the metallic substrate, consequently reducing its service life. In response, a La 2 Hf 2 O 7 -based ceramic doped with a NiFe 2 O 4 second phase is developed to prevent the penetration of thermal radiation and achieve exceptional thermal radiation shielding properties. The experimental results exhibit that 85%La 2 Hf 2 O 7 /15%NiFe 2 O 4 possesses high absorptivity exceeding 0.85 across a broad wavelength range (0.2-14 µm), and ultra-low transmittance of 0.001 in the range of 0.4-2.5 µm. It attributes to the presence of multi-valent transition elements (Ni + /Ni 2+ and Fe 2+ /Fe 3+ ) in NiFe 2 O 4 , which significantly reduce the band gap width, enhancing photon absorption, scattering, and electron transition probability following infrared radiation absorption. These multifaceted contributions minimize radiative thermal conductivity to 1.55 W m −1 K −1 , effectively shielding the radiative heat transfer. These advantages make this high-temperature thermal shielding strategy highly competitive for the next generation of TBC materials development and application.
研究领域:
材料科学
·
航空航天工程
·
热力学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）