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Thursday, July 16, 2020 | History

2 edition of Effect of temperature gradient on thick film selective emitter emittance found in the catalog.

Effect of temperature gradient on thick film selective emitter emittance

Effect of temperature gradient on thick film selective emitter emittance

  • 20 Want to read
  • 18 Currently reading

Published by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, D.C, Springfield, Va .
Written in English

    Subjects:
  • Temperature gradients.,
  • Thick films.,
  • Emittance.,
  • Emitters.,
  • Mathematical models.

  • Edition Notes

    StatementDonald L. Chubb ... [et al.].
    SeriesNASA technical memorandum -- 107523.
    ContributionsChubb, Donald L., United States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15503840M

      The effect of substrate temperature, deposition rate and annealing on the electrical resistivity of thin yttrium films in the thickness range 10 to 80 nm is reported. The resistivity of films decreases at higher deposition rates and substrate temperatures. These experimental results are analysed using the Fuchs—Sondheimer and Mayadas—Shatzkes Cited by: 6. Thick-film piezoresistive sensors are an advantageous technology for measuring mechanical loads, i.e. force (Figs. 1 & 2) [], torque and pressure, given their moderate cost and compatibility with harsh environments. Although inorganic thick-film resistors (TFRs) are expected to drift only at high temperature, other effects may lead.

    In practice, salt-gradient solar ponds consist of three layers, or zones: (1) a surface convecting zone of low-salinity water, typically m ( in.) thick; (2) a non-convecting or salinity-gradient zone beneath the surface zone, in which salt concentration increases with depth, typically m ( ft) thick; and (3) a storage.   Developing a polarization gradient proved advantageous as it expanded the temperature range for ideal performance of the ferroelectric material. The functioning of barium titanate is largely dependent on temperature, where the effects are comparatively small at room temperature and a sharp, large peak is observed at nearly °C.

    The effect of carbon dioxide on the thermal gradient works in two ways. Firstly, yes, it does make a very minute change in the mean specific heat of air. But its own specific heat has a mean of about compared with air just over Hence its effect is to reduce the gradient but only by about 1 part in 10, Influence of temperature gradients on the part properties for the simultaneous laser beam melting of polymers Tobias Laumera-c, Thomas Stichela,b, Michael Schmidta-d aBayerisches Laserzentrum GmbH, Konrad -Zuse Str. 2 6, Erlangen, Germany bCollaborative Research Center (CRC) “Additive Manufacturing”.


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Effect of temperature gradient on thick film selective emitter emittance Download PDF EPUB FB2

Abstract. A temperature gradient across a thick (>.1 mm) film selective emitter will produce a significant reduction in the spectral emittance from the no temperature gradient case. Thick film selective emitters of rare earth doped host materials such as yttrium-aluminum-garnet (YAG) are examples where temperature gradient effects are important.

Effect of temperature gradient on thick film selective emitter emittance (OCoLC) Online version: Chubb, Donald L. Effect of temperature gradient on thick film selective emitter emittance (OCoLC) Material Type: Government publication, National government publication, Internet resource: Document Type: Book, Internet Resource.

Effect of temperature gradient on thick film selective emitter emittance (OCoLC) Microfiche version: Effect of temperature gradient on thick film selective emitter emittance (OCoLC) Material Type: Document, Government publication, National government publication, Internet resource: Document Type: Internet Resource, Computer File.

A temperature gradient across a thick (⩾.1 mm) film selective emitter will produce a significant reduction in the spectral emittance from the no temperature gradient case.

Thick film selective emitters of rare earth doped host materials such as yttrium-aluminum-garnet (YAG) are examples where temperature gradient effects are important.

In this paper a model is developed for the Cited by: 7. Chubb DL, Good BS, Clark EB, Zheng C () Effect of temperature gradient on thick film selective emitter emittance, Proceedings of the 3rd NREL conference on thermophotovoltaic generation of electricity, Denver, Colorado, 18–21 May American Institute of Physics, pp – Google ScholarCited by: 2.

We use cookies to offer you a better experience, personalize content, tailor advertising, provide social media features, and better understand the use of our services. The effect of substrate temperature (T sub) on the structure (crystal orientation and surface morphology) and property (electrical resistivity) of the laser-ablated IrO 2 thin films was investigated.

Well crystallized and single-phase IrO 2 thin films were obtained at T sub = – K in an oxygen partial pressure of 20 by: The effect of sintering temperature on electrical properties of thick film varistors was investigated. The voltage gradient of thick film varistors increased significantly to V/mm after.

Recent studies have proposed several types of solar selective absorber/emitter coating such as multilayer, photonic crystal, and metal/metal-oxide - dielectric composite.Among these, a ceramic-metal composite called cermet is considered to have the potential for use in solar energy applications by mass proposed a double cermet film structure of Mo–Al 2 O Cited by: Figure 6 shows spectra at room temperature and at 93 K of a colorless sample of quartz that develops the violet color after irradiation (amethyst).

At low temperature the bands appear higher, narrower, and shifted up to 10 cm-1 (Fritzgerald et al., ). The broad band at cm-1 at room temperature is decomposed into several bands at 93 K.

Influence of Thickness and Interface on the Low-Temperature Enhancement of the Spin Seebeck Effect in YIG Films Er-Jia Guo,1,2 Joel Cramer,1 Andreas Kehlberger,1 Ciaran A. Ferguson,3 Donald A.

MacLaren,3 Gerhard Jakob,1 and Mathias Kläui1,* 1Institute of Physics, Johannes Gutenberg-University Mainz, Mainz, Germany.

Radiative cooling occurs because the atmospheric emittance is low in the wavelength interval 8–13 μm particularly if the air is dry.

We derive expressions which specify the optical properties demanded for a surface capable of being cooled to low temperatures. The key factor is infrared selectivity with low reflectance in the 8–13 μm ’’window’’ but high reflectance by:   The R-1 effect is induced by a potential gradient from the substrate or interface.

Such structural inversion asymmetry lifts the spin degeneracy and leads to a Cited by: The gradient is applicable to various physical properties, like temperature, pressure or electric potential. A simple example is the slope of an inclined plane, shown below, where the function is the height of the plane.

Here the gradient is shown as the red vector, which points in the direction of the maximum slope or maximum rate of height. Thin Solid Films, () 51 Effect of substrate temperature on the microstructure of thin niobium films C. Siirgers, C. Strunk and H. L6hneysen Physikalisches 1nstitut, Universitiit Karlsruhe, Engesser Str.

7, D Karlsruhe (Germany)File Size: KB. Effect of film thickness on the infrared reflectance of very thin metallic films. / Sparrow, E. M.; Heinisch, R. P.; Tien, K. In: Journal of Heat Transfer, Vol. 95 Cited by: 2.

effect of substrate temperature on the crystal growth orientation and some physical properties of sno2: f thin films deposited by spray pyrolysis technique demet tatar1, gÜven turgut1 and bahattin dÜzgÜn1 1ataturk university, k.

education faculty, File Size: 1MB. Guest post by Ira Glickstein. Albert Einstein was a great theoretical physicist, with all the requisite mathematical tools.

However, he rejected purely mathematical abstraction and resorted to physical analogy for his most basic insights. For example, he imagined a man in a closed elevator being transported to space far from any external mass and then subjected to.

Spectral and total temperature-dependent emissivities of few-layer structures on a metallic substrate Etienne Blandre,∗ Pierre-Olivier Chapuis, and Rodolphe Vaillon Universit´e de Lyon, CNRS, INSA-Lyon, UCBL, CETHIL, UMR, F, Villeurbanne. Shouldn't the effect of this be added to the solar flux effect to calculate a non-greenhouse temperature.

Penurious (talk)28 April (UTC) Conduction of heat from the Earth's interior is well below W/m2, and makes a difference of only about K in temperature.

Effect of Substrate Temperature on the Structure and the Metal Insulator Transition in Pulsed laser deposed VO 2 Films on Soda Lime glass A. Diallo1, N M Ndiaye1, B.

D. NgomS Khamlich, K. Talla1, S. Ndiaye1, N. Manyala4, O Nemraoui5, R Madjoe6, A. C. Beye1, M. Maaza 1-Laboratoire de Photonique et de Nano-Fabrication, Faculté des sciences et. The base graphic is from Wikipedia, with my are two main “windows” in the Atmospheric “greenhouse effect”.

The first, the Visible Light Window, on the left side of the graphic, allows visible and near-visible light from the Sun to pass through with small losses, and the second, the Longwave Window, on the right, allows the central portion of the .The thickness effect of CuO thin films on electrical and gas sensing properties Sameer Atta Maki & Ons Ahmed Mahmoud Collage of education for pure science Ibn AL-Haitham university of Baghdad, Iraq Abstract— Copper Oxide (CuO) thin films was prepared by thermal evaporation using Oxidation thermal at different thickness ()nm.