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Articles de revues sur le sujet « NIR reflective pigments »

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Auteur : Grafiati
Publié le 11 mars 2023

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1

Oka, Ryohei, et Toshiyuki Masui. « Synthesis and characterization of black pigments based on calcium manganese oxides for high near-infrared (NIR) reflectance ». RSC Advances 6, no 93 (2016) : 90952–57. http://dx.doi.org/10.1039/c6ra21443f.

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Ca2Mn0.85Ti0.15O4 was synthesized as an inorganic black pigment with thermal barrier properties, and its NIR solar reflectance value was much greater than those of the conventional NIR reflective black pigments.
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Rosati, Andrea, Michele Fedel et Stefano Rossi. « NIR reflective pigments to mitigate the urban heat islands effect (UHIE) ». E3S Web of Conferences 172 (2020) : 03006. http://dx.doi.org/10.1051/e3sconf/202017203006.

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For building applications, coatings are needed in order to obtain an attractive appearance and protection against the outdoor environments. Buildings are responsible for consumption of cooling energy. Cool coatings applied over buildings surface provide an effective solution for passive cooling of building indoors and influencing local outdoor microclimate, mitigating urban heat islands effect (UHIE). Cool coatings have to resistant to weathering and ageing. For this reason, we developed near infrared (NIR) reflective pigments with the aim to add in binder and obtaining a cool coating. A series of pigments displaying YIn0.9Mn0.1O3–ZnO stoichiometry was synthesized by sol-gel route. The dried gel precursor was calcined at different temperatures for 2h (650°C, 800°C and 850°C) to observe the formation of a light brown pigment and two different blue shades. Precursors and calcined final pigments were characterized by using physicochemical analyses. The colour of pigments was studied using CIE-2004 L*a*b* colorimetric method. The cooling effect of pigments and their thermal stability were confirmed by NIR reflectance measurements and TGA respectively.
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Gulrez, Syed K. H., Ahmed M. Abdel-Ghany, Ibrahim M. Al-Helal, Saeed M. Al-Zaharani et Abdullah A. Alsadon. « Evaluation of PE Films Having NIR-Reflective Additives for Greenhouse Applications in Arid Regions ». Advances in Materials Science and Engineering 2013 (2013) : 1–8. http://dx.doi.org/10.1155/2013/575081.

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Linear-low-density-polyethylene- (LLDPE-) based formulations with several near-infrared- (NIR-) reflective pigments were prepared by melt blending technique and their subsequent films were prepared by blown film extrusion process. Thermal properties of these films were evaluated using differential scanning calorimetry (DSC). The results showed that the melting and crystallization temperatures (TmandTc, resp.) of these formulations were almost similar to that of control resin. The melt viscosity was measured by stress-controlled rotational rheometer and melt flow index (MFI) instruments. Rheological measurements indicated that the blend formulations with NIR-reflective additive have similar melt viscoelastic behavior (storage modulus and dynamic viscosity) to the control resin. The mechanical test performed on NIR-reflective films showed similar values of tensile strength for blend samples as that of control resin. The spectral radiometric properties of the blend films were evaluated in the solar wavelength range of 200–1100 nm and found to be improved over the control sample without having NIR-reflective pigment.
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Thongkanluang, Thadsanee, Pichet Limsuwan et P. Rakkwamsuk. « Preparation of IR Reflective Green Pigment ». Advanced Materials Research 55-57 (août 2008) : 805–8. http://dx.doi.org/10.4028/www.scientific.net/amr.55-57.805.

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This research article reports a development on green pigments having high reflectance of NIR radiation from the sun. The aim of the development is to use the green pigments as a component of building paint to reduce heat penetrating into the building. Cr2O3, a green pigment oxide, was used as the host component and the mixtures of Al2O3, V2O5 and TiO2 were used as the guest components. Al2O3, V2O5 and TiO2 were mixed at different 36 compositions according to triaxial diagram. For each sample preparation, 80% wt Cr2O3 was mixed with 20%wt of guest component for each composition. Then the mixed sample were calcined at 1150 °C for 4 hours and were ground with an agate ball mill for 7 minutes at a speed of 250 rev/min. Finally, the pigments were sieved to obtain the particle sizes of 0.5 - 2.0 µm. The pigment powders were compressed in a mold to get samples in the form of thin disks, each one with a diameter of 2.7 cm and a thickness of 4 mm. The reflectance for all samples was measured using a spectrophotometer in the wavelength ranging from 300 – 2100 nm in accordance with ASTM E891. It was found that the maximum reflectance, in the wavelengths ranging from 780 – 2100 nm, of 82.83% was obtained from the sample with a composition of 80%Cr2O3, 14%Al2O3, 4%TiO2 and 2% V2O5.
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Ramos, Nuno M. M., Joana Maia, Andrea R. Souza, Ricardo M. S. F. Almeida et Luís Silva. « Impact of Incorporating NIR Reflective Pigments in Finishing Coatings of ETICS ». Infrastructures 6, no 6 (25 mai 2021) : 79. http://dx.doi.org/10.3390/infrastructures6060079.

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Near-infrared (NIR) reflective materials are being developed for mitigating building cooling needs. Their use contributes to broadening the range of colours, responding to the urban aesthetic demand without compromising the building performance. Despite the increase in NIR reflective pigments investigation, there is still a knowledge gap in their applicability, impact, and durability in multilayer finishing coatings of External Thermal Insulation Composite Systems (ETICS). Hence, the main goal of this work consists of evaluating the impact of incorporating NIR reflective pigments (NRP) in the solar reflectance of the surface layer of ETICS, without affecting the colour perception, as well as their influence on the colour durability and surface temperature. As such, colour, solar reflectance, and surface temperature were monitored for 2 years in dark-coloured specimens of ETICS, with and without NRP and a primer layer. It was confirmed that the main contribution of NRP is the increase of solar reflectance and, consequently, the decrease in surface temperature, especially for high exterior temperatures (around 30 ºC). Moreover, these pigments highly increase the NIR reflectance without affecting the visible colour. In addition, they contribute to maintaining the colour characteristics. The application of primer increased the surface temperature, especially for higher exterior temperatures. However, it contributes to a lower colour difference and solar reflectance variation, which is an important achievement for durability purposes.
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Sinmongkolkul, Kanyawee, Pattana Rakkwamsuk, Tippaban Palathai, Sasijuta Wattanarach, Parjaree Thavorniti et Sitthisuntorn Supothina. « Purification of TiO2 from Leucoxene for the Synthesis of NIR-Reflective Cr-doped CaTiO3 Pigment ». Chiang Mai Journal of Science 49, no 1 (31 janvier 2022) : 93–104. http://dx.doi.org/10.12982/cmjs.2022.008.

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This work aimed to explore the possibility of producing NIR-reflective pigment from Thai leucoxene which is an abundant mineral consisting of ~89 wt.% TiO2, 6 wt.% SiO2 and 5 wt.% other oxides such as Al2O3 and Fe2O3. The leucoxene was purified by selective leaching of undesired oxides with NaOH under hydrothermal condition. Effects of NaOH concentration, hydrothermal temperature and time were investigated. The results revealed that dissolutions of the SiO2 and Al2O3 increased with an increased NaOH concentration, while that of the ZrO2 and Fe2O3 remained the same, resulting in the increased TiO2 concentration. The SiO2 dissolution also increased with an increased temperature and time. The optimum leaching condition, i.e. 4 M NaOH, 180 °C and 60 min, yielded TiO2 content of 93.94 ±0.14 wt.%. The Cr-doped CaTiO3 pigments (CaCrxTi1-xO3; x = 0, 0.025, 0.05, 0.75 and 0.1), synthesized from the purified leucoxene, CaO and Cr2O3 by solid-state reaction at 1100 °C, exhibited brown color hue and NIR reflectance in a range of 34.5−59.8% depending on the Cr content. At the Cr content of 0.05, the pigment exhibited decent brownish appearance and modest NIR reflectance of 50.7% which was close to that of the pigment synthesized from pure rutile. The glaze consisting of 10 wt.% pigment had a glossy light brown appearance, and possessed NIR reflectance of 75.0 %, indicating a promising application in a field of NIR-reflective coating.
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Primo, Julia de Oliveira, Dienifer F. L. Horsth, Nayara Balaba, Polona Umek, Fauze J. Anaissi et Carla Bittencourt. « Synthesis of Blue Gahnite (ZnAl2O4:Co, Nd) : A Cost-Effective Method for Producing Solar-Reflective Pigments for Cool Coatings ». Materials 16, no 4 (17 février 2023) : 1696. http://dx.doi.org/10.3390/ma16041696.

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Developing strategies for the green synthesis of novel materials, such as pigments for protection from solar radiation, is a fundamental research subject in material science to mitigate the heat island effect. Within this perspective, the current study reports on the synthesis of blue pigments of ZnAl2O4:M (M = Co2+ and Co2+/Nd3+) using recycled metallic aluminum (discarded can seal) with reflective properties of Near-infrared radiation. The pigments were characterized by XRD, SEM, XPS, UV-Vis, NIR diffuse reflectance spectroscopy, and CIE-1976 L*a*b* color measurements. The wettability of the coatings containing the synthesized pigments was also evaluated. The structural characterization showed that the pigments present the Gahnite crystalline phase. Colorimetric measurements obtained by the CIEL*a*b* method show values correlated to blue pigments attributed to Co2+ ions in tetrahedral sites. The pigments exhibit high near-infrared solar reflectance (with R% ≥ 60%), with an enhancement of nearly 20% for the pigment-containing neodymium when applied in white paint, indicating that the prepared compounds have the potential to be energy-saving color pigments for coatings.
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Rossi, Stefano, Hampus Lindmark et Michele Fedel. « Colored Paints Containing NIR-Reflective Pigments Exposed to Accelerated Ultraviolet Radiation Aging with Possible Application as Roof Coatings ». Coatings 10, no 11 (23 novembre 2020) : 1135. http://dx.doi.org/10.3390/coatings10111135.

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This study aims to evaluate the difference in thermal behavior among paints with the presence of traditional and NIR pigments by means of a simple and cheap laboratory-scale test. Considering these goals, the thermal and esthetical properties of two different cool coatings were assessed, highlighting their positive and limited aspects. Two different complex near-infrared inorganic reflective (NIR) pigments with yellow and black respectably colors were mixed in an acrylic waterborne copolymer binder. The paint formulations were applied on steel panels. The thermal performance of the coatings was investigated in the NIR-region of the light spectrum by exposing the samples to an IR-lamp. The outer and inner surface temperatures of the painted panels were recorded using thermocouples and an IR camera. The samples were aged by artificial UV-B light exposure. Color and specular gloss changes at different exposure times were evaluated. The behavior of the cool coatings was compared with that of conventional coatings with similar color characteristics. The black cool coating achieved a maximum temperature decrease, compared to the conventional black one, of approximately 12 °C. The stability for the cool coatings was very similar to that of the conventional coating, indicating that black pigment could be a potential candidate for cool-coating applications. The yellow cool coatings did not show a significant decrease in temperature compared to the conventional paint. The gloss and color changes resulted as influenced by the types and amount of pigments.
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9

Rosati, Andrea, Michele Fedel et Stefano Rossi. « NIR reflective pigments for cool roof applications : A comprehensive review ». Journal of Cleaner Production 313 (septembre 2021) : 127826. http://dx.doi.org/10.1016/j.jclepro.2021.127826.

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10

Jose, Sheethu, Aiswaria Prakash, Sourav Laha, Srinivasan Natarajan et Mundlapudi Lakshmipathi Reddy. « Green colored nano-pigments derived from Y2BaCuO5 : NIR reflective coatings ». Dyes and Pigments 107 (août 2014) : 118–26. http://dx.doi.org/10.1016/j.dyepig.2014.03.025.

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Kim, J. H., V. Patil, J. M. Chun, H. S. Park, S. W. Seo et Y. S. Kim. « Design of Near Infrared Reflective Effective Pigment for LiDAR Detectable Paint ». MRS Advances 5, no 11 (2020) : 515–22. http://dx.doi.org/10.1557/adv.2020.24.

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ABSTRACTLight Detection and Ranging (LiDAR) is a primary sensor for autonomous vehicles to recognize surroundings. It detects near-infrared (NIR) light pulses, typically at 905nm, which is emitted and reflected by surrounding objects. Here, the fact of the matter is that conventional black or dark-tone cars with extremely low NIR reflection are hard to be detected by LiDAR and endanger the future highway. In this work, we propose to use platelet-shaped effect pigments with visible absorption and NIR reflectivity. Copper(Ⅱ) oxide and Silicon dioxide multilayer are theoretically investigated with different numbers of layers and thicknesses. The optimized structures appear various dark-tone colors with high NIR-reflectivity over 90%.
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12

Divya, S., et Subrata Das. « New red pigments based on Li3AlMnO5 for NIR reflective cool coatings ». Ceramics International 47, no 21 (novembre 2021) : 30381–90. http://dx.doi.org/10.1016/j.ceramint.2021.07.218.

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13

Gramm, Georg, Gerda Fuhrmann, Fabian Zimmerhofer, Martin Wieser et Hubert Huppertz. « Development of High NIR‐Reflective Red Li 2 MnO 3 Pigments ». Zeitschrift für anorganische und allgemeine Chemie 646, no 21 (6 octobre 2020) : 1722–29. http://dx.doi.org/10.1002/zaac.202000274.

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14

Zhao, Xin Qiao, Yu Jun Zhang et Xiao Yu Zhang. « Synthesis and Characterization of Yellow Pigments Fabricated by Sol-Gel and Solid-State Reaction Routes ». Key Engineering Materials 655 (juillet 2015) : 212–15. http://dx.doi.org/10.4028/www.scientific.net/kem.655.212.

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Novel environment-friendly near-infrared reflective Y5.2Nd0.8MoO12+σ pigments were fabricated by sol-gel and solid-state reaction routes, and the properties of both pigments were compared. The pigments were characterized by XRD, SEM, CIE-L*a*b* color-measurements, and UV-vis-NIR spectroscopy. The results show that pigments obtained by sol-gel routes crystallize completely at 900 °C, much lower than 1300 °C of solid-state reaction routes. Nano-size pigments fabricated by sol-gel routes possess an average grain size of ~ 50 nm, largely finer than 3 μm of solid-state reaction ones. Moreover, the sol-gel processed pigments show a higher near-infrared reflectance than solid-state reaction ones, which are 98.3 % and 91.7 %, respectively, but with a slightly light yellow color hue.
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Aranzabe, Estibaliz, Pedro María Villasante, Ricard March, María Isabel Arriortua, Julen Vadillo, Aitor Larrañaga et Ana Aranzabe. « Preparation and characterization of high NIR reflective pigments based in ultramarine blue ». Energy and Buildings 126 (août 2016) : 170–76. http://dx.doi.org/10.1016/j.enbuild.2016.05.011.

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Zhao, Xinqiao, Yujun Zhang, Yan Huang, Hongyu Gong et Jiaxing Zhao. « Synthesis and characterization of neodymium doped yttrium molybdate high NIR reflective nano pigments ». Dyes and Pigments 116 (mai 2015) : 119–23. http://dx.doi.org/10.1016/j.dyepig.2015.01.018.

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17

Yun, Tae Ho, et Changyong Yim. « Uniform Fabrication of Hollow Titania Using Anionic Modified Acrylated Polymer Template for Phase Composition Effect as Photocatalyst and Infrared Reflective Coating ». Nanomaterials 11, no 11 (26 octobre 2021) : 2845. http://dx.doi.org/10.3390/nano11112845.

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Polymer coatings containing thermal blocking and near-infrared (NIR)-reflective pigments have received much attention for their potential applications in energy-saving fields. A drawback of these coatings is sustainability providing similar long-term performance. Surface cleaning is mandatory to remove contaminants that decrease reflectance. In this study, synthesized hollow titania as photocatalyst was used to impart anti-contamination to infrared (IR)-reflective coatings. A TiO2 shell was selectively formed on an anionic polystyrene core, modified by methacrylic acid. According to sintering temperature, the enhancement of light absorption ability and photocatalytic activity as methyl orange decomposition was observed with phase composition change. The methylene blue decomposition reaction, reflectance measurement, and measuring thermal profiling of coated steel confirmed the manifestation of hollow particles to dust degradation characteristics and the enhancement of reflection and thermal shielding.
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Rossi, Stefano, Massimo Calovi, Domenico Dalpiaz et Michele Fedel. « The Influence of NIR Pigments on Coil Coatings’ Thermal Behaviors ». Coatings 10, no 6 (28 mai 2020) : 514. http://dx.doi.org/10.3390/coatings10060514.

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The effect of over-heating in urban areas, called the urban heat island effect (UHI effect), is responsible for greater energy consumption for cooling buildings. Several reflective near-infrared (NIR) coatings, called cool coatings have proved to be effective for contrasting the UHI effect. The thermal and appearance properties of cool coatings depend on the color and they often have been studied only at the initial state, without undergoing atmospheric degradation and soiling. In this work, the thermal, visual and durability behaviors of red and brown polyester-based organic coatings for roof applications were studied. All samples were subjected to accelerated degradation cycles composed of UV-B and salt spray chamber exposure. The sample degradation was assessed by infrared spectroscopy, gloss and colorimetric analyses. Moreover, the thermal behavior was studied by means of a simplified experimental setup. Finally, a soiling and weathering test was conducted to simulate the soiling of three years’ external exposure. Despite the phenomena of chemical degradation and a decrease in aesthetic properties, the samples maintain their thermal performance, which is not even influenced by dirt products. In addition, NIR pigments significantly improve the thermal behavior of brown coatings.
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Soranakom, Piya, Naratip Vittayakorn, Pattana Rakkwamsuk, Sitthisuntorn Supothina et Panpailin Seeharaj. « Effect of surfactant concentration on the formation of Fe2O3@SiO2 NIR-reflective red pigments ». Ceramics International 47, no 9 (mai 2021) : 13147–55. http://dx.doi.org/10.1016/j.ceramint.2021.01.179.

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Rus, I., R. Ianoș, R. Lazău et C. Păcurariu. « New blue pigments based on Co2+ and La3+ doped hibonite for NIR-reflective coatings ». Materials Today Chemistry 28 (mars 2023) : 101391. http://dx.doi.org/10.1016/j.mtchem.2023.101391.

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Schildhammer, Daniel, Gerda Fuhrmann, Lucas Petschnig, Nikolaus Weinberger, Herwig Schottenberger et Hubert Huppertz. « Synthesis and characterization of a new high NIR reflective ytterbium molybdenum oxide and related doped pigments ». Dyes and Pigments 138 (mars 2017) : 90–99. http://dx.doi.org/10.1016/j.dyepig.2016.11.024.

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Schildhammer, Daniel, Gerda Fuhrmann, Lucas Petschnig, Herwig Schottenberger et Hubert Huppertz. « Synthesis and optical properties of new highly NIR reflective inorganic pigments RE6Mo2O15 (RE = Tb, Dy, Ho, Er) ». Dyes and Pigments 140 (mai 2017) : 22–28. http://dx.doi.org/10.1016/j.dyepig.2017.01.021.

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Yuan, Lin, Aijun Han, Mingquan Ye, Xingxing Chen, Cheng Ding et Lingyun Yao. « Preparation, characterization and thermal performance evaluation of coating colored with NIR reflective pigments : BiVO4 coated mica-titanium oxide ». Solar Energy 163 (mars 2018) : 453–60. http://dx.doi.org/10.1016/j.solener.2018.01.009.

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Martini, Francesca, Pierpaolo Minei, Marco Lessi, Luca Contiero, Silvia Borsacchi, Giacomo Ruggeri, Marco Geppi, Fabio Bellina et Andrea Pucci. « Structural order and NIR reflective properties of perylene bisimide pigments : Experimental evidences from a combined multi-technique study ». Dyes and Pigments 179 (août 2020) : 108401. http://dx.doi.org/10.1016/j.dyepig.2020.108401.

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Balamurugan, S., L. Ashna et P. Parthiban. « Synthesis of Nanocrystalline MgO Particles by Combustion Followed by Annealing Method Using Hexamine as a Fuel ». Journal of Nanotechnology 2014 (2014) : 1–6. http://dx.doi.org/10.1155/2014/841803.

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In this work, nanocrystalline MgO particles were prepared through combustion method using magnesium nitrate as oxidizer and hexamine as a fuel. The materials obtained by combustion method were subsequently annealed at800°Cfor 3 h to improve the crystallinity and phase purity. The obtained MgO nanomaterials were characterized by powder X-ray diffraction analysis (XRD), infrared (IR) spectroscopy, photoluminescence (PL), near-infrared (NIR) spectroscopy, and scanning electron microscopy (SEM). The cubic crystal structure with lattice parameter,a= 0.4210(4) nm with average crystalline size of 22 nm, is obtained for the nano-MgO particles. The PL emission spectrum of nanocrystalline MgO materials exhibits three emission peaks at 432, 465, and 495 nm which are due to various structural defects. The SEM results expose the fact that the MgO nanomaterials are seemingly porous and highly agglomerated with fine particles. Owing to the higher reflectance of prepared nanocrystalline MgO, it can be used as NIR reflective pigments. The present results prove that the combustion technique using hexamine can produce the materials with high crystallinity. To the best of our knowledge, this is the first report on the synthesis of nanocrystalline MgO materials by combustion method using hexamine as a fuel.
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Ossai, Chinedu I., et Nagarajan Raghavan. « Nanostructure and nanomaterial characterization, growth mechanisms, and applications ». Nanotechnology Reviews 7, no 2 (25 avril 2018) : 209–31. http://dx.doi.org/10.1515/ntrev-2017-0156.

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AbstractNanostructures are playing significant roles in the development of new functions and the enhancement of the existing functions of industrial devices such as sensors, transistors, diodes, lithium-ion batteries, and photovoltaic cells, due to their piezoelectricity, biocompatibility, and pyroelectrical characteristics. This research focused on the review of the characteristics of different nanostructures and nanomaterials such as ZnO, ZnS, MoS2, GO, TiO2, SnO2, and Fe2O3, their fabrication techniques, growth mechanisms, and applications. The factors affecting the growth mechanisms, the crystallographic natures, growth models of anisotropic nanostructures, and growth of nanocrystals, were also highlighted in this research. The existence of lattice mismatch, differential thermal expansion, and high deposition temperature, have affected uniform deposition of nanoparticles on substrates and caused heteroepitaxy, which has resulted in defective nanostructures. Although heteroepitaxy has negatively affected the characteristics and potential applications of nanostructures, it has also opened new research frontiers for potential new applications of nanostructures. The use of nanostructures for gas sensing is attributed to the high specific area, change of resistance on exposure to gases, and high photoconduction abilities, while the photon-carrier collection abilities and anti-reflectance qualities are vital for solar photovoltaic cells. Nanostructures have also been used as coating pigments to prevent corrosion of facilities, reduce urban heat islands and energy consumptions, due to the near infrared (NIR) reflective characteristics.
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Kavitha, K., et A. Sivakumar. « Impact of titanium concentration in structural and optical behaviour of nano Bi2Ce2−x TixO7 (x = 0–1) high NIR reflective and UV shielding yellow and orange pigments ». Inorganic Chemistry Communications 120 (octobre 2020) : 108163. http://dx.doi.org/10.1016/j.inoche.2020.108163.

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Wang, Shi Fa, Xiang Yu Chen, Hua Jing Gao, Lei Ming Fang, Qi Wei Hu, Guang Ai Sun, Sheng Nan Tang, Hao Liu, Chuan Yu et Xu Dong Pan. « A Comparative Study on the Phase Structure, Optical and NIR Reflectivity of BaFe12O19 Nano-Pigments by the Traditional and Modified Polyacrylamide Gel Method ». Journal of Nano Research 67 (avril 2021) : 1–14. http://dx.doi.org/10.4028/www.scientific.net/jnanor.67.1.

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Barium hexaferrite (BaFe12O19) nano- pigment is a pigment with high near infrared reflection in the wavelength range of 1400-2500 nm. The BaFe12O19 nano- pigments were synthesized by the traditional and modified polyacrylamide gel method and characterized by thermogravimetric and differential scanning calorimetry (TG-DSC) analyses, X-ray powder diffraction (XRD), fourier transform infrared (FTIR), transmission electron microscopy (TEM), and UV-Visible spectrophotometer. The physicochemical properties of BaFe12O19 nanopigments are strongly dependent on the synthesis route. The introduction of carbon particles into the BaFe12O19 precursor accelerates the formation of BaFe12O19 phase, reduces its particle diameter and changes its color properties. The modified polyacrylamide gel method makes it possible to obtain a high efficient near infrared reflection BaFe12O19 nano- pigments with a solar reflectance SR>90%. The high near infrared reflection makes BaFe12O19 nano- pigments have potential applications in the field of heat shielding.
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Thongkanluang, T., N. Chirakanphaisarn et P. Limsuwan. « Preparation of NIR Reflective Brown Pigment ». Procedia Engineering 32 (2012) : 895–901. http://dx.doi.org/10.1016/j.proeng.2012.02.029.

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Moriomoto, Takuro, Ryohei Oka, Kohei Minagawa et Toshiyuki Masui. « Novel near-infrared reflective black inorganic pigment based on cerium vanadate ». RSC Advances 12, no 26 (2022) : 16570–75. http://dx.doi.org/10.1039/d2ra02483g.

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Moriomoto, Takuro, Ryohei Oka, Kohei Minagawa et Toshiyuki Masui. « Novel near-infrared reflective black inorganic pigment based on cerium vanadate ». RSC Advances 12, no 26 (2022) : 16570–75. http://dx.doi.org/10.1039/d2ra02483g.

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Thejus, P. K., K. V. Krishnapriya et K. G. Nishanth. « NIR reflective, anticorrosive magenta pigment for energy saving sustainable building coatings ». Solar Energy 222 (juillet 2021) : 103–14. http://dx.doi.org/10.1016/j.solener.2021.05.017.

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Sangwong, Nuchjarin, Mantana Suwan et Sitthisuntorn Supothina. « Synthesis of NIR-Reflective Oxide Ceramic Orange Pigment from MgO and Leucoxene ». Integrated Ferroelectrics 222, no 1 (27 décembre 2021) : 283–92. http://dx.doi.org/10.1080/10584587.2021.1965822.

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Zhang, Xiao Yu, Yu Jun Zhang, Hong Yu Gong, Xin Qiao Zhao, Cui Ling Wang et Hong Li Zhu. « Synthesis, Characterization and Optical Properties of Y6-xSmxMoO12+σ Composite/Compounds Pigments with High Near-Infrared Reflectance ». Advanced Materials Research 602-604 (décembre 2012) : 102–6. http://dx.doi.org/10.4028/www.scientific.net/amr.602-604.102.

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Novel high near-infrared reflecting inorganic pigments Y6-xSmxMoO12+σ (03+ in yttrium molybdate through a simple solid-state reaction method. The composites were characterized using scanning electron microscope, X-ray diffraction, UV-vis-NIR spectrophotometer and CIE 1976 L*a*b* color scales. The substitution of Sm3+ for Y3+ in Y6MoO12 changed the color from bright yellow to dark yellow and most importantly increased near-infrared reflectance in the wavelength range of 700-2500 nm. The chemical stability of the pigments was also evaluated.
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Lai, S. M., J. L. Liu, C. Y. Huang, Wei-Jen Lai, Jiun-Wei Zeng, K. C. Cheng et C. W. Huang. « Preparation and Properties of Polyethylene Terephthalate (PET)/Near Infrared Reflective Pigment (NIR) Composites ». Journal of Macromolecular Science, Part B 52, no 10 (janvier 2013) : 1355–71. http://dx.doi.org/10.1080/00222348.2013.766075.

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Jose, Sheethu, Soumya B. Narendranath, Deepak Joshy, N. V. Sajith, M. R. Prathapachandra Kurup et Pradeepan Periyat. « Low temperature synthesis of NIR reflecting bismuth doped cerium oxide yellow nano-pigments ». Materials Letters 233 (décembre 2018) : 82–85. http://dx.doi.org/10.1016/j.matlet.2018.08.136.

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Sameera, Saithathul Fathimah, Padala Prabhakar Rao, Leela Sandhya Kumari, Vineetha James et Saraswathy Divya. « Potential NIR Reflecting Yellow Pigments in (BiV)1−x(YNb)xO4 Solid Solutions ». Chemistry Letters 42, no 5 (5 mai 2013) : 521–23. http://dx.doi.org/10.1246/cl.130111.

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Balamurugan, S., K. Dheebikha et T. S. Gokul Raja. « Nanocrystalline Gd2Ti2O7 Pyrochlore Material for NIR Reflective Pigment Application : Micro-Structural and Optical Studies ». Journal of Nanoscience and Nanotechnology 16, no 1 (1 janvier 2016) : 677–88. http://dx.doi.org/10.1166/jnn.2016.10604.

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Zou, Jian, et Peng Zhang. « Ni-doped BaTi5O11 : New brilliant yellow pigment with high NIR reflectance as solar reflective fillers ». Ceramics International 46, no 3 (février 2020) : 3490–97. http://dx.doi.org/10.1016/j.ceramint.2019.10.063.

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Shchikaltsova, D. I., Yu T. Platov, V. A. Rassulov, R. A. Platova et E. Yu Romanova. « Color Assessment of Facing Brick by UV-VIS-NIR Spectroscopy ». Stroitel'nye Materialy 787, no 12 (2020) : 16–20. http://dx.doi.org/10.31659/0585-430x-2020-787-12-16-20.

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Diffuse reflection UV-VIS-NIR spectroscopy was used to study changes in the color of facing bricks from the content of the additive of manganese tetraoxide (Mn3O4) into the ceramic mass. This investigation was shown that with an increase of the additive content, both the intensity of the absorption bands of colored bricks corresponding to hematite decreases, and the absorption intensity increases with a shift in the maximum of the wide absorption band from the visible to the near-infrared range of the spectrum. By changing the values of the color coordinates in the CIE L*a*b* and Mansell systems: lightness and color, and the values of the indicator-relative color ability, it is fixed that the color of a brick depends on the ratio of two pigments: yellowish-red of hematite and black, probably jacobsite in its composition.
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Rosati, Andrea, Michele Fedel et Stefano Rossi. « YIn0.9Mn0.1O3–ZnO NIR reflective nano-pigment exhibiting three different colors : Ochre, cyan blue, and deep blue ». Journal of Solid State Chemistry 299 (juillet 2021) : 122176. http://dx.doi.org/10.1016/j.jssc.2021.122176.

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Elakkiya, V., et S. Sumathi. « Vanadium and bismuth doped FePO4 as Near Infra Red (NIR) reflective pigment for energy saving application ». Materials Chemistry and Physics 290 (octobre 2022) : 126561. http://dx.doi.org/10.1016/j.matchemphys.2022.126561.

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Kaenphakdee, Sujittra, Pimpaka Putthithanas, Supan Yodyingyong, Jeerapond Leelawattanachai, Wannapong Triampo, Noppakun Sanpo, Jaturong Jitputti et Darapond Triampo. « Zinc Oxide Synthesis from Extreme Ratios of Zinc Acetate and Zinc Nitrate : Synergistic Morphology ». Materials 15, no 2 (13 janvier 2022) : 570. http://dx.doi.org/10.3390/ma15020570.

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The synthesis of ZnO comprising different ratios of zinc acetate (ZA) and zinc nitrate (ZN) from the respective zinc precursor solutions was successfully completed via a simple precipitation method. Zinc oxide powders with different mole ratios of ZA/ZN were produced—80/1, 40/1, and 20/1. The crystallinity, microstructure, and optical properties of all produced ZnO powders were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), and UV-Vis-NIR spectrophotometry. The average agglomerated particle sizes of ZnO-80/1, ZnO-40/1, and ZnO-20/1 were measured at 655, 640, and 620 nm, respectively, using dynamic light scattering (DLS). The optical properties of ZnO were significantly affected by the extreme ratio differences in the zinc precursors. ZnO-80/1 was found to have a unique coral-sheet structure morphology, which resulted in its superior ability to reflect near-infrared (NIR) radiation compared to ZnO-40/1 and ZnO-20/1. The NIR-shielding performances of ZnO were assessed using a thermal insulation test, where coating with ZnO-80/1 could lower the inner temperature by 5.2 °C compared with the neat glass substrate. Due to the synergistic effects on morphology, ZnO-80/1 exhibited the property of enhanced NIR shielding in curtailing the internal building temperature, which allows for its utilization as an NIR-reflective pigment coating in the construction of building envelopes.
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Sangwong, Nuchjarin, Mantana Suwan et Sitthisuntorn Supothina. « Effect of calcination temperature and dolomite or Al2O3 doping on properties of NIR–reflective CoFe2O4 black pigment ». Materials Today : Proceedings 17 (2019) : 1595–601. http://dx.doi.org/10.1016/j.matpr.2019.06.187.

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Raj, Athira K. V., P. Prabhakar Rao et K. Rajesh. « Potential NIR reflecting yellow pigments powder in monoclinic scheelite type solid solutions : BiVO4-GdPO4 for cool roof applications ». Inorganic Chemistry Communications 149 (mars 2023) : 110416. http://dx.doi.org/10.1016/j.inoche.2023.110416.

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Chen, Chenlu, Aijun Han, Mingquan Ye et Jieyu Wang. « Study on thermal insulation performance of ASA (acrylonitrile-styrene-acrylate) modified by Fe-doped Y3Al5O12 NIR solar reflective pigment ». Solar Energy Materials and Solar Cells 239 (juin 2022) : 111656. http://dx.doi.org/10.1016/j.solmat.2022.111656.

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Busabok, Chumphol, Wasana Khongwong, Phunthinee Somwongsa, Piyalak Ngernchuklin, Arunrat Saensing et Sittichai Kanchanasutha. « Preparation of Near-Infrared (NIR) Reflective Pigment by Solid State Reaction between Fe2O3 and Al2O3 ». Key Engineering Materials 766 (avril 2018) : 127–32. http://dx.doi.org/10.4028/www.scientific.net/kem.766.127.

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Reflective pigment was prepared by using Fe2O3 and Al2O3 as starting materials. Fe2O3 and Al2O3 powders were mixed at 0.8:2, 1:2 and 1.2:2 mole ratio using ball milling. The mixed powders were dried and calcined at temperature of 1500°C, 1600°C and 1700°C for various soaking time at 2, 8 and 20 h. Phase data were analyzed by x-ray diffractometry. It was found that (Al1-x, Fex)2O3 presented as a new phase in calcined powders at temperature of 1500°C to 1700°C for 2 h. The other new phase such as FeAl2O4 was detected in calcined powders at temperature of 1700°C for 8 and 20 h. From the experimental results indicated that complete reaction was occurred when higher calcination temperature and longer soaking time were used, resulting in spinel structure (FeAl2O4) generated. Then, the synthesized powders were mixed with exterior paint by mass ratio of 0:100, 10:90, 20:80, 30:70 and 40:60, respectively. The mixed paints were sprayed on metal sheets. Then the coated metal sheets were exposed under 200 watts lamb and measured the temperature difference between the exposed side and opposite side. The result showed that at the ratio of 30:70 exhibited the highest temperature difference of 14°C approximately. From the result, we concluded that spinel structure (FeAl2O4) is a candidate for near-infrared (NIR) reflective pigment of exterior paint.
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Raj, Athira K. V., P. Prabhakar Rao, T. S. Sreena et T. R. Aju Thara. « Pigmentary colors from yellow to red in Bi2Ce2O7 by rare earth ion substitutions as possible high NIR reflecting pigments ». Dyes and Pigments 160 (janvier 2019) : 177–87. http://dx.doi.org/10.1016/j.dyepig.2018.08.010.

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Balamurugan, S., et S. V. Sreenija. « Studies on Monoclinic Zirconia (ZrO2) Powder Heat Treated with NaCl Flux and Its NIR Reflective Pigment Application ». Advanced Science, Engineering and Medicine 8, no 3 (1 mars 2016) : 222–27. http://dx.doi.org/10.1166/asem.2016.1746.

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Kavitha, K., et A. Sivakumar. « Synthesis and characterisation of cerium doped bismuth titanate proficient UV shielding and NIR reflective reddish brown pigment by citrate autocombustion synthesis ». Inorganic Chemistry Communications 136 (février 2022) : 109162. http://dx.doi.org/10.1016/j.inoche.2021.109162.

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