Temperature-dependent emissivity property in La0.7Sr0.3MnO3 films

Fan, Desong; Li, Qiang; Dai, Ping

doi:10.1016/j.actaastro.2016.01.001

Cited by 24 publications

(10 citation statements)

References 38 publications

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“…[146] Currently, the most popular perovskite oxide is lanthanum strontium manganite oxide (LSMO), which presents more efficient thermal emissivity modulation than other perovskite oxides. [143,147,148] For instance, Huang et al [143] investigated the infrared emissivity of bulk LSMO and its combinations with different metallic/dielectric gratings (Figure 9c). The results indicated that the bulk LSMO modulated the thermal emissivity from 0.10 to 0.65 (Case 1 in Figure 9d), while the LSMO integrated with Al and SiO 2 gratings (Case 4 in Figure 9d) achieved a higher emissivity modulation due to the local resonance structure.…”

Section: Thermo-responsive Materialsmentioning

confidence: 99%

Solar and Thermal Radiation‐Modulation Materials for Building Applications

Chai

Fan

2022

Advanced Energy Materials

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the building envelope, which mainly consists of transparent and opaque components. For transparent components (e.g., window), the STRMMs should have high transparency of visible light (0.38-0.76 µm) under both hot and cold ambient conditions to guarantee natural lighting. Nearinfrared (NIR) light (0.77-2.5 µm), which accounts for 52% of solar heat, [9] should be reflected in summer for cooling purpose but be transmitted into room in winter to induce solar heat gains. For opaque components (e.g., wall), the STRMMs should have high reflectance of both visible and NIR lights in summer but low reflectance of both lights in winter. Meanwhile, as both transparent and opaque components continuously emit thermal radiation into the outdoor ambient, the STRMMs should have low infrared thermal emissivity in winter to suppress radiative heat loss but high infrared thermal emissivity in summer to accelerate radiative heat dissipation. Figure 1b shows the ideal optical properties of STRMMs applied on transparent and opaque components in both heating and cooling modes. Existing reviews mainly focused on the daytime radiative cooling materials with fixed solar reflectance and thermal emissivity, [10][11][12] which only helps reduce building cooling loads in summer but inevitably increases building heating loads in winter, leading to limited building energy savings. Recently, owing to the rapid development of material science, the STRMMs have been widely explored, which can dynamically modulate the optical properties under external triggers (e.g., thermo and electrical) to accommodate the heating/cooling needs of building in different seasons, showing improved building energy-saving potentials. [13][14][15][16][17] Although there are reviews reporting the materials with modulating optical properties, [15,18] they merely focused on either solar or thermal radiation modulation, which provide limited or even negative building energy savings, which may mislead the researchers to design low energy-efficient materials in practice. For instance, the thermochromic (TC) window can achieve low solar transmittance in hot season but high solar transmittance in cold season. [13,19] Nonetheless, it maintains high thermal emissivity (above 90%) in both seasons. This would accelerate heat loss of building in cold season, and result in limited energy savings. The vanadium dioxide (VO 2 )-based Fabry-Perot (FP) resonator can achieve low thermal emissivity in cold season but high thermal emissivity in hot season, while it maintains constant solar absorptance (25%) in both seasons. This would induce much more solar heating than the conventional cooling materials with smaller solar absorptance (10%), resulting in Regulation of solar and thermal radiation of building envelope shows huge energy-saving potentials. Existing reviews mainly focus on the materials with fixed solar and thermal optical properties. Although there are reviews reporting the materials with modulated optical properties (e.g., radiative cooling materials with modulating thermal emi...

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Section: Thermo-responsive Materialsmentioning

confidence: 99%

Solar and Thermal Radiation‐Modulation Materials for Building Applications

Chai

Fan

2022

Advanced Energy Materials

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“…Li et al. [ 63,64 ] synthesized La 0.7 Ca 0.3− x Sr x MnO 3 compositions which exhibited tunable infrared properties and Δε reached 0.6 finally when heating it to 373 K. Yu et al. [ 65 ] prepared La 0.67 Ca 0.25 Sr 0.08 MnO 3 whose transition temperature decreased to 9 °C while the emissivity changed from 0.23 to 0.73 when temperature varied between −50 to 50 °C.…”

Section: Thermochromic Materialsmentioning

confidence: 99%

Smart Materials for Dynamic Thermal Radiation Regulation

Wei

Ren

et al. 2021

Small

100

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Thermal radiation in the mid‐infrared region profoundly affects human lives in various fields, including thermal management, imaging, sensing, camouflage, and thermography. Due to their fixed emissivities, radiance features of conventional materials are usually proportional to the quadruplicate of surface temperature, which set the limit, that one type of material can only present a single thermal function. Therefore, it is necessary and urgent to design materials for dynamic thermal radiation regulations to fulfill the demands of the age of intelligent machines. Recently, the ability of some smart materials to dynamically regulate thermal radiation has been evaluated. These materials are found to be competent enough for various commands, thereby, providing better alternatives and tremendously promoting the commercial potentials. In this review, the dynamic regulatory mechanisms and recent progress in the evaluation of these smart materials are summarized, including thermochromic materials, electrochromic materials, mechanically and humidity responsive materials, with the potential applications, insufficient problems, and possible strategies highlighted.

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“…(3) 4-Subsequently, a trapezoidal integration [21][22][23] is performed under the curve to calculate the absolute absorptance of the material as shown in Equation 4.…”

Section: Figure 2 Sample Holder and Sic Samplementioning

confidence: 99%

Study on solar absorptance and thermal stability of solid particles materials used as TES at high temperature on different aging stages for CSP applications

Palacios

Calderón

Barreneche

et al. 2019

Solar Energy Materials and Solar Cells

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The use of solid particles as heat transfer fluid (HTF) presents a great potential to overcome drawbacks addressed in commercial Concentrated Solar Power (CSP) plants. The solid particles thermal energy storage (TES) system allows achieving both high thermal performance at high temperature and low cost from the material perspective. The conversion efficiency of CSP solid particles-based systems at high temperatures strongly depends on the optical properties and thermophysical properties of materials used both as HTF and as storage medium. The present study is aimed to provide more experimental data and evidences of the potential in using particulate solids for CSP application. The solar absorptance and the specific heat capacity of silicon carbide (SiC), silica sand (SiO2), and hematite (Fe2O3) are studied after different aging times at 750ºC and 900ºC. The solar absorptance slightly increases over the aging process except for the silica sand, which decreases its absorptance in the first 100 hours, reaching a plateau. After the aging treatment, the specific heat capacity is increased for both SiC and silica sand. However, for the iron oxide the specific heat capacity is lower after aging. The black silicon carbide SiC is proven to be the best option to be used up to 900ºC as it shows the highest solar absorptance (96%) and the highest heat storage capacity.

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Temperature-dependent emissivity property in La0.7Sr0.3MnO3 films

Cited by 24 publications

References 38 publications

Solar and Thermal Radiation‐Modulation Materials for Building Applications

Solar and Thermal Radiation‐Modulation Materials for Building Applications

Smart Materials for Dynamic Thermal Radiation Regulation

Study on solar absorptance and thermal stability of solid particles materials used as TES at high temperature on different aging stages for CSP applications

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