Spectral and Total Emissivity and Reflectivity at High Temperatures PDF Download
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Author:
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ISBN:
Category :
Languages : en
Pages : 89
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Book Description
The emissometer is an extension of the multiproperty apparatus which is a powerful and unique tool for simultaneously measuring ten thermophysical properties on the same sample of an electrically-conducting solid and of studying its behavior under various environmental conditions. The apparatus features rapid time-to-temperature and data acquisition under minicomputer control yielding state-of-the-art accuracy. Performance evaluation tests of the emissometer are presented. These tests deal with veiling glare, blackbody cavity quality, and temperature distribution in the heating tube and sample. In addition spectral emissivity measurements to at least 10 micrometers have been made on tantalum (reference material), SiC, Si3N4, graphite and carbon-carbon composites from 1500 to 2400 K or their respective degradation temperatures. The new data on the ceramics provides some understanding on their high temperature behavior including the effect of fabrication process and impurities.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 89
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Book Description
The emissometer is an extension of the multiproperty apparatus which is a powerful and unique tool for simultaneously measuring ten thermophysical properties on the same sample of an electrically-conducting solid and of studying its behavior under various environmental conditions. The apparatus features rapid time-to-temperature and data acquisition under minicomputer control yielding state-of-the-art accuracy. Performance evaluation tests of the emissometer are presented. These tests deal with veiling glare, blackbody cavity quality, and temperature distribution in the heating tube and sample. In addition spectral emissivity measurements to at least 10 micrometers have been made on tantalum (reference material), SiC, Si3N4, graphite and carbon-carbon composites from 1500 to 2400 K or their respective degradation temperatures. The new data on the ceramics provides some understanding on their high temperature behavior including the effect of fabrication process and impurities.
Author: Robert Siegel
Publisher:
ISBN:
Category : Heat
Languages : en
Pages : 210
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Book Description
Author: R. L. Seifert
Publisher:
ISBN:
Category : Beryllium oxide
Languages : en
Pages : 32
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 758
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Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author: Oak Ridge National Laboratory
Publisher:
ISBN:
Category : Energy conservation
Languages : en
Pages : 2238
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Book Description
Author: W. R. McMahon
Publisher:
ISBN:
Category : Heat
Languages : en
Pages : 52
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Book Description
Spectral emissivities are give for Y2O3, Sm2O3, Gd2O3, Er2O3 and Lu2O3 in the visible portion of the spectrum for temperatures up to 1600 deg C. The data were obtained using a carbon arc image furnace as an energy source, a photovoltaic cell as a radiation detector, a thermocouple as a temperature detector, and a magnesium oxide smoked plate as a standard of reflectance. Emissivity is calculated from a curve of combined reflectance and emitted radiation versus temperature by using Kirchoff's law and a method of successive approximations to solve Wien's equation.
Author: J. A. Clark
Publisher: Elsevier
ISBN: 1483149749
Category : Science
Languages : en
Pages : 235
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Book Description
Theory and Fundamental Research in Heat Transfer focuses on the processes, methodologies, reactions, and mechanisms involved in heat transfer. The selection first offers information on thermal radiation characteristics of surfaces, including intensity of radiation, intensity of emission and angular emittance, reflectance relationships, diffuse reflector, hemispherical and total reflectances, reflectivity of homogeneous isotropic polished surfaces, and angular total remittance measurements. The text then takes a look at heat transfer in rarefied gas flow, as well as accommodation coefficient and free molecule transfer, near free molecule heat transfer, continuum heat transfer regimes, and transitional regime. The publication ponders on boiling heat transfer and plasma heat transfer. Turbulent heat transfer in stratified flow, thermal conductivity of solids, and studies on quantitative spectroscopy and gas emissivities are also discussed. Topics include emissivity calculations, mechanisms of thermal conductivity, and conductivity at low and intermediate temperatures. The selection is a dependable reference for readers interested in the processes, reactions, and mechanisms involved in heat transfer.
Author: John R. Howell
Publisher: CRC Press
ISBN: 149875774X
Category : Science
Languages : en
Pages : 1016
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Book Description
Explore the Radiative Exchange between Surfaces Further expanding on the changes made to the fifth edition, Thermal Radiation Heat Transfer, 6th Edition continues to highlight the relevance of thermal radiative transfer and focus on concepts that develop the radiative transfer equation (RTE). The book explains the fundamentals of radiative transfer, introduces the energy and radiative transfer equations, covers a variety of approaches used to gauge radiative heat exchange between different surfaces and structures, and provides solution techniques for solving the RTE. What’s New in the Sixth Edition This revised version updates information on properties of surfaces and of absorbing/emitting/scattering materials, radiative transfer among surfaces, and radiative transfer in participating media. It also enhances the chapter on near-field effects, addresses new applications that include enhanced solar cell performance and self-regulating surfaces for thermal control, and updates references. Comprised of 17 chapters, this text: Discusses the fundamental RTE and its simplified forms for different medium properties Presents an intuitive relationship between the RTE formulations and the configuration factor analyses Explores the historical development and the radiative behavior of a blackbody Defines the radiative properties of solid opaque surfaces Provides a detailed analysis and solution procedure for radiation exchange analysis Contains methods for determining the radiative flux divergence (the radiative source term in the energy equation) Thermal Radiation Heat Transfer, 6th Edition explores methods for solving the RTE to determine the local spectral intensity, radiative flux, and flux gradient. This book enables you to assess and calculate the exchange of energy between objects that determine radiative transfer at different energy levels.
Author: Joseph C. Richmond
Publisher: Forgotten Books
ISBN: 9780266847496
Category : Science
Languages : en
Pages : 92
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Book Description
Excerpt from Procedures for Precise Determination of Thermal Radiation Properties: November 1964 to October 1965 Key Words: Emissivity, emittance, high temperature reflectance, infrared reflectance, radiation properties, reflectance, Spectral emittance, Spectral reflectance, thermal radiation, total emittance. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: Yoshio Nishi
Publisher: CRC Press
ISBN: 1420017667
Category : Technology & Engineering
Languages : en
Pages : 1720
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Book Description
Retaining the comprehensive and in-depth approach that cemented the bestselling first edition's place as a standard reference in the field, the Handbook of Semiconductor Manufacturing Technology, Second Edition features new and updated material that keeps it at the vanguard of today's most dynamic and rapidly growing field. Iconic experts Robert Doering and Yoshio Nishi have again assembled a team of the world's leading specialists in every area of semiconductor manufacturing to provide the most reliable, authoritative, and industry-leading information available. Stay Current with the Latest Technologies In addition to updates to nearly every existing chapter, this edition features five entirely new contributions on... Silicon-on-insulator (SOI) materials and devices Supercritical CO2 in semiconductor cleaning Low-κ dielectrics Atomic-layer deposition Damascene copper electroplating Effects of terrestrial radiation on integrated circuits (ICs) Reflecting rapid progress in many areas, several chapters were heavily revised and updated, and in some cases, rewritten to reflect rapid advances in such areas as interconnect technologies, gate dielectrics, photomask fabrication, IC packaging, and 300 mm wafer fabrication. While no book can be up-to-the-minute with the advances in the semiconductor field, the Handbook of Semiconductor Manufacturing Technology keeps the most important data, methods, tools, and techniques close at hand.
