Metamaterial emitter for thermophotovoltaics stable up to
˜e focus of the present work is to investigate the thermal stability limit of such thin ˆat refractory W and HfO 2 based layered metamaterial structures which avoid surface di˝usion. ˜ese thin ˚lms were investigated under medium and high vacuum conditions 37 in our case 10 −2 to 10−3 and 10 −5 to 10−6 mbar vacuum pressures
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Inverse heat flux in double layer thermal metamaterial
M Keidar et al 2 Q k T z k TT L d d HL =− effe =− ff (1) where k eff is the effective thermal conductivity coefficient T H is the temperature at the hot end L is the temperature T at the cold end and L is the length of the thermal conductor. Naturally the thermal conductivity coefficient is character-istic of a conductive material and it is of positive value.
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Multipole Resonance in Arrays of Diamond Dielectric A
the fields of thermal radiation photoelectric detection and solar energy. 2. Materials and Methods Firstly we selected commonly used materials for detailed discussion and then observed the absorption properties of other dielectric and refractory materials. A schematic diagram of the proposed DBMPA is shown in Figure1a and that of the unit
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Recent Advances in Thermal Metamaterials and Their Future
Indeed thermal metamaterials can make an impact on electronic packaging .With rapid development of nanoelectronics 3D-integrated circuits (ICs) and flexible electronics thermal management is becoming more challenging .For example in 2.5D packages the logic power as well as the number of high band width memory (HBM) layers continue to increase 27 28 .
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Recent Advances in Thermal Metamaterials and Their Future
Indeed thermal metamaterials can make an impact on electronic packaging .With rapid development of nanoelectronics 3D-integrated circuits (ICs) and flexible electronics thermal management is becoming more challenging .For example in 2.5D packages the logic power as well as the number of high band width memory (HBM) layers continue to increase 27 28 .
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Integrated and spectrally selective thermal emitters
Jan 05 2021 · The concept and the theoretical and experimental implementation of the selectively broadband metamaterial thermal emitters. (A) Schematic diagram of the LTEs where two 1D photonic lattices with structures of (Si/Cr/Si) n and (SiO 2 /Si) m are lying on top of a Ni 80 Cr 20 nanolayer deposited on a quartz substrate. Voltage is applied to the Ni 80 Cr 20 layer to generate Joule heat to
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Infrared selective emitters with thin films of polar
Thermal degradation of refractory layered metamaterial for thermophotovoltaic emitter under high vacuum condition the layered metamaterial theoretically yields a high convertible radiative
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Refractory Liningan overview ScienceDirect Topics
In Smithells Metals Reference Book (Eighth Edition) 2004. 27.8 Design of refractory linings. A refractory lining usually comprises a safety or backup layer behind the working lining in contact with the furnace contents. The whole body is encased in a metal shell. The temperature gradients in the system and the properties of all materials must be considered.
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Electrodeposited 3D Tungsten Photonic Crystals with
Oct 18 2011 · Thermal degradation of refractory layered metamaterial for thermophotovoltaic emitter under high vacuum condition. Optics Express 2019 27 (3) 3039. DOI 10.1364/OE.27.003039. Kehang Cui Paul Lemaire Hangbo Zhao Timothy Savas Gregory Parsons A. John Hart.
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Refractory Liningan overview ScienceDirect Topics
In Smithells Metals Reference Book (Eighth Edition) 2004. 27.8 Design of refractory linings. A refractory lining usually comprises a safety or backup layer behind the working lining in contact with the furnace contents. The whole body is encased in a metal shell. The temperature gradients in the system and the properties of all materials must be considered.
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Recent Advances in Thermal Metamaterials and Their Future
Indeed thermal metamaterials can make an impact on electronic packaging .With rapid development of nanoelectronics 3D-integrated circuits (ICs) and flexible electronics thermal management is becoming more challenging .For example in 2.5D packages the logic power as well as the number of high band width memory (HBM) layers continue to increase 27 28 .
Get PriceIntegrated and spectrally selective thermal emitters
Jan 05 2021 · The concept and the theoretical and experimental implementation of the selectively broadband metamaterial thermal emitters. (A) Schematic diagram of the LTEs where two 1D photonic lattices with structures of (Si/Cr/Si) n and (SiO 2 /Si) m are lying on top of a Ni 80 Cr 20 nanolayer deposited on a quartz substrate. Voltage is applied to the Ni 80 Cr 20 layer to generate Joule heat to
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Nanomaterials Free Full-Text Multipole Resonance in
Excellent characteristics and promising application prospects promote the rapid development of metamaterials. We have numerically proposed and demonstrated a novel subwavelength broadband metamaterial perfect absorber (BMPA) based on diamond dielectric arrays. The proposed absorber is composed of an ultra-thin two-layer structure covering the dielectric periodic array on a metal substrate.
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Radiative engineering with refractory epsilon-near-zero
We also investigate the main mechanisms of thermal degradation of the fabricated refractory metamaterial both in terms of optical performance and structural stability using spectral analysis and energy-dispersive X-ray spectroscopy (EDS) techniques. Importantly we observe chemical stability of the constituent materials for temperatures up to
Get PriceInverse heat flux in double layer thermal metamaterial
M Keidar et al 2 Q k T z k TT L d d HL =− effe =− ff (1) where k eff is the effective thermal conductivity coefficient T H is the temperature at the hot end L is the temperature T at the cold end and L is the length of the thermal conductor. Naturally the thermal conductivity coefficient is character-istic of a conductive material and it is of positive value.
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Thermal degradation of refractory layered metamaterial for
Emissivity-tunable metamaterials of layered refractory metal and dielectric have great potentials as a simple thermophotovoltaic (TPV) selective emitter due to its near-omnidirectional polarization-independent and broadband selective emissivity. However it is known that the stability of the layered structure is limited by the oxidation of metals.
Get PriceThermal graphene metamaterials and epsilon-near-zero high
Mar 31 2017 · A substrate coated with a graphene layer has been reported to have highly directive far-field thermal emission enhanced light absorption and enhanced near-field radiation transfer 48 49 . An important emerging platform is that of multilayer graphene based metamaterials 5052 which have been reported to exhibit tunable absorption and
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(PDF) Quasi-coherent thermal emitter based on refractory
Quasi-coherent thermal emitter based on refractory plasmonic materials Jingjing Liu 1 Urcan Guler 2 Alexei Lagutchev 1 Alexander Kildishev 1 Oana Malis 3 Alexandra Boltasseva 1 4 and Vladimir M. Shalaev1 1 School of Electrical and Computer Engineering and Birck Nanotechnology Center Purdue University West Lafayette IN 47907 USA 2 Nano-Meta Technologies Inc. 1281 Win Hentschel
Get PriceThermal MetamaterialsUniversity of Notre Dame
Thermal metamaterials. A thermal shield made of a concentric layered structure of latex rubber and silicone elastomer. A thermal concentrator made of azimuthally alternating layers of latex and elastomer A thermal inverter made of a spiral arrangement of copper and polyurethane S Narayana Y Sato Phys. Rev. Lett. 108 214303 (2012)
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Radiative engineering with refractory epsilon-near-zero
We also investigate the main mechanisms of thermal degradation of the fabricated refractory metamaterial both in terms of optical performance and structural stability using spectral analysis and energy-dispersive X-ray spectroscopy (EDS) techniques. Importantly we observe chemical stability of the constituent materials for temperatures up to
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Thermal degradation of refractory layered metamaterial for
Feb 01 2019 · Thermal degradation of refractory layered metamaterial for thermophotovoltaic emitter under high vacuum condition Kim Jin Hwan Jung Sang Min Shin Moo Whan Abstract. Publication Optics Express. Pub Date February 2019 DOI 10.1364/OE.27.003039 Bibcode 2019OExpr..27.3039K full text sources
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Refractory Plasmonics Science
Apr 18 2014 · Refractory materials are defined as those with a high melting point and chemical stability at temperatures above 2000°C. Applications based on refractory materials usually nonmetallic span a wide range of areas including industrial furnaces space shuttle shields and semiconductor technology. Metals have also been studied as refractories however the optical properties of those metals
Get PriceSensitive detection of chlorpyrifos pesticide using an all
Mar 15 2020 · Thermal degradation of refractory layered metamaterial for thermophotovoltaic emitter under high vacuum condition Opt. Express 27 ( 2019 ) pp. CrossRef View Record in Scopus Google Scholar
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Nanophotonic-Engineered Photothermal Harnessing for
The thermal nanophotonic (TNPh) structure consists of hybrid metal oxide-dielectric metamaterial film with a periodically layered structure. It is constructed by alternate spin-coating or dip-coating of titanium dioxide (TiO 2) and mesoporous silicon dioxide (SiO 2) films and the topmost layer of mesoporous titanium dioxide/copper (TiO 2
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Effect of Slag Impregnation on Thermal Degradations in
To understand the degradation process in refractories the usual approach consists in listing and classifying the loading parameters. In the specific case of refractories used in steel-making plants working linings are subjected to three major types of load histories (1) Thermal loadings. The refractory lining is subjected to
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(PDF) CORROSION-EROSION WEAR OF REFRACTORY BRICKS IN
Microstructural analysis of campaigning refractory Visual inspectionThe side views of the refractory cuts show the presence of a surface layer of glass (Fig. 7a) penetrated in the refractory (Fig. 7b transversal view) toward the end of the cut it is observed a microstructure attacked by the glass and with high porosity (Fig. 7c).
Get PriceElectrodeposited 3D Tungsten Photonic Crystals with
Oct 18 2011 · Thermal degradation of refractory layered metamaterial for thermophotovoltaic emitter under high vacuum condition. Optics Express 2019 27 (3) 3039. DOI 10.1364/OE.27.003039. Kehang Cui Paul Lemaire Hangbo Zhao Timothy Savas Gregory Parsons A. John Hart.
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Refractory Liningan overview ScienceDirect Topics
In Smithells Metals Reference Book (Eighth Edition) 2004. 27.8 Design of refractory linings. A refractory lining usually comprises a safety or backup layer behind the working lining in contact with the furnace contents. The whole body is encased in a metal shell. The temperature gradients in the system and the properties of all materials must be considered.
Get PriceThermal stability of tungsten based metamaterial emitter
Feb 27 2020 · At 1500 °C the metamaterial emitter structure shows spectral degradation i.e. high emissivity in the long-wavelength region due to the structural changes in the emitter structure
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Metamaterial Receivers for High Efficiency Concentrated
Abstract. Operation of concentrated solar power receivers at higher temperatures (>700°C) would enable supercritical carbon dioxide (sCO 2) power cycles for improved power cycle efficiencies (>50 ) and cost-effective solar thermal power.Unfortunately radiative losses at higher temperatures in conventional receivers can negatively impact the system efficiency gains.
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