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Sunday, November 8, 2020 | History

2 edition of Thermoelectric power in silver-gold and silver-germanium alloys found in the catalog.

Thermoelectric power in silver-gold and silver-germanium alloys

Irving Weinberg

Thermoelectric power in silver-gold and silver-germanium alloys

  • 285 Want to read
  • 28 Currently reading

Published by Jet Propulsion Laboratory, California Institute of Technology in Pasadena .
Written in English

    Subjects:
  • Silver-gold alloys.,
  • Silver-germanium alloys.,
  • Metals -- Thermal properties.

  • Edition Notes

    Statement[by] I. Weinberg.
    SeriesJPL technical report 32-1060
    ContributionsUnited States. National Aeronautics and Space Administration.
    Classifications
    LC ClassificationsTN693.S5 W4
    The Physical Object
    Paginationiv, 10 p.
    Number of Pages10
    ID Numbers
    Open LibraryOL4544701M
    LC Control Number77012319

    Gold and silver unite in all proportions, yielding alloys which are harder, more fusible, and more elastic than either metal. The hardest is that containing two parts of gold to one of silver. The colour of gold is sensibly lowered by the addition of very small quantities of silver, and on increasing the proportion of the latter, the colour changes by tints of a greenish-yellow (when from Solid Silver Power features an exclusive enzymatic formula designed to remove proteins and other soils from flatware. It detarnishes silverware in the presence of aluminum, eliminates film on flatware and minimizes rewashes. The alkalinity of Silver Power penetrates and breaks up film on flatware, enzymes break down remaining protein and.   In other words, the thermoelectric generator is a thermocouple or TC. If a few hundred TCs are wired in series in a radial zig-zag fashion, so the heated junctions are in the center while the cooled junctions are fanned out around the outer circumference, a small amount of electrical power can be produced. Such a device is called a thermopile.


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Thermoelectric power in silver-gold and silver-germanium alloys by Irving Weinberg Download PDF EPUB FB2

Solute concentrations and resistivities for dilute silver-gold and silver-germanium alloys 3 2. Values of characteristic thermopowers SJ and S^ obtained from Nordheim-Gorter plots at and ° K 5 Figures 1.

Thermoelectric power of silver and dilute silver-gold alloys from 78to°K 4 2. An illustration of an open book. Books. An illustration of two cells of a film strip.

Video An illustration of an audio speaker. Thermoelectric power in silver-gold and silver-germanium alloys Item Preview remove-circle Thermoelectric power in silver-gold and silver-germanium alloys by Weinberg, I.

Publication date Thermoelectric power in silver-gold and silver-germanium alloys. By I. Weinberg. Get PDF ( KB) Thermoelectric powers of silver-gold and silver-germanium alloy Topics: PHYSICS, SOLID-STATE.

Year: OAI identifier: oai:hor: I. Weinberg. Abstract. The thermoelectric powers of dilute silver-gold and silver-germanium alloys are determined from 78 to °K.

Nordheim-Gorter plots are made for these alloy systems at and °K, and the characteristic thermopowers S e 1 and S e 0, due to solute and solvent, respectively, are determined at these ated values of S e 1, for both alloy systems, agree in sign and Cited by: 7. Thermoelectric power in silver-gold silver- germanium alloys.

By I. Weinberg. Abstract. Silver-gold and silver-germanium alloys tested for Fermi surface changes with alloying, using thermoelectric power measurement Topics: PHYSICS, SOLID-STATE Author: I.

Weinberg. Heavily doped semiconductors, such as silicon-germanium thermoelectric couples (also called thermocouples or unicouples), are used in space exploration.

SiGe alloys present good thermoelectric properties. Their performance in thermoelectric power production is characterized by high dimensionless figures-of-merit (ZT) under high temperatures, which has been shown to be near 2 in. The thermoelectric powers of dilute silver-gold and silver-germanium alloys are determined from 78 to °K.

Measurements have been made of the absolute thermoelectric power of alloys Thermoelectric power in silver-gold and silver-germanium alloys book.

Thermoelectric Figure of Merit. The usefulness of a material in thermoelectric systems is determined by the device are determined by the material's electrical conductivity, thermal conductivity, Seebeck coefficient which change with maximum efficiency of the energy conversion process (for both power generation and cooling) at a given point in the material is.

The absolute thermoelectric power of liquid Ag-Ge alloys has been measured as a function of temperature over the whole phase diagram in 10 at.% steps, from the liquidus to °C. To interpret these original measurements we present an analytical expression of the thermoelectric power of the liquid alloys within the extended Faber-Ziman formalism in terms of partial structure factors and t.

Thermoelectric power vs. reciprocal of the electrical resistivity for silver-gold alloys. (T = ). vertical axis, and the slope of the line, we obtain ^imp = _i pV/ and S^ = ^V/. The value obtained for S^ is equal, within the experimental error, to the value l-3lJu.V/.

Thermoelectric power and thermal conductivity in the silver-gold alloy system from °K. The Philosophical Magazine: A Journal of Theoretical Experimental and Applied Physics: Vol. 22, No.pp. The thermoelectric properties of N‐type and P‐type Si‐Ge alloys have been reviewed and detailed calculations for the efficiency of a thermoelectric generator made from a 70% Si‐30% Ge.

Half Heusler Alloys for Efficient Thermoelectric Power Conversion L. Chen,1,a) X. Zeng,2 T. Tritt,2,3 and S. Poon1,a) 1 Department of Physics, University of Virginia, Charlottesville, Virginia 2 Department of Physics and Astronomy, Clemson University, Clemson, South Carolina 3 Materials Science & Engineering Department, Clemson University, Clemson, South Carolina   Thermal conductivity measurements have been made on a series of germanium‐silicon alloys.

At °K for an alloy containing 56 atomic percent Si, the thermal conductivity was found to be six times smaller than the value for pure Ge.

Measurements of the thermoelectric power on some alloys are also reported. It is then shown that solid‐solution alloying can significantly increase the. Thermoelectric Power and Thermal Conductivity in the Silver-Gold Alloy System From °K. Crisp & J. Rungis - - Philosophical Magazine 22 of Noble Metal Alloys.

Barnard - - Philosophical Magazine 17 () Add more citations Similar books and articles. Thermoelectric Power of Silver Alloys at Very Low.

The solution treatment and aging of a aluminum alloy was studied using the thermoelectric power (TEP) measurement technique, and the results compared to those obtained by microhardness and optical microscopy.

The TEP value changes with solution treatment temperature and duration and reaches a maximum value for solution treatment at °C.

Thermoelectric Power of Metals Softcover reprint of the original 1st ed. Edition by J. Blatt (Author) ISBN ISBN Why is ISBN important. ISBN. This bar-code number lets you verify that you're getting exactly the right version or edition of a book.

The digit and digit formats both work. ABSTRACT Thennoefectric power measurements have been made over the temperature range K to 7K in applied magnetic fields up to 50 KOe on dilute alloys of Fe in Au, Cu and Rh and of Ce in Au, Alloy concentrations were in the range to p,p.m.

atomic. It has been shown that the observed results on. We report measurements of the magnetic susceptibility and the thermoelectric power of Ag–Au alloys containing Yb as impurity. The results show that the magnetic moment on the Yb atoms disappears in.

Most of the low-temperature thermoelectric behavior of annealed and cold-worked silver and gold samples can be accounted for satisfactorily by using Kohler's equation, S = ΣW i S i /ΣW i, to calculate as a function of temperature the diffusion thermoelectricity under the influence of various competing scattering mechanisms in the metals, and by taking account of the phonon-drag contribution.

(). Thermoelectric power of alloys: Validity of the gorter-nordheim relation. The Philosophical Magazine: A Journal of Theoretical Experimental and Applied Physics: Vol.

Thermoelectric and related transport properties of metals have been a source of information and, also, exasperation to physicists for over a century. Perhaps the principal reasons for interest in these phenomena are their sensitivity to composition, structure and external fields and, until fairly.

the state of the art thermoelectric material, silicon germanium (SiGe), for high temperature power generation. Further improvement of thermoelectric performance of Si-Ge alloys hinges upon how to significantly reduce the as yet large lattice thermal conductivity, and optimizing the thermoelectric power factor PF.

Our methods, in this. SECTION 1. IDENTIFICATION. Product Name: Gold Germanium Eutectic Alloy Product Number: All applicable American Elements product codes, e.g. GE-AUI, GE-AUL, GE-AUP, GE-AUST, GE-AUPE Relevant identified uses of the substance: Scientific research and development. Basic Principles of Thermoelectric Modules & Materials.

THERMOELECTRIC MATERIALS: The thermoelectric semiconductor material most often used in today’s TE coolers is an alloy of Bismuth Telluride that has been suitably doped to provide individual blocks or elements having distinct “N” and “P” characteristics.

Thermoelectric materials most often are fabricated by either. In Werner Haken, following the studies on ZnSb and CdSb of Becquerel [3], quantitatively characterized the Seebeck coefficient (now in uV/K) and electrical conductivity of many elements, alloys and compounds correctly identifying Sb2Te3, Bi2Te3, BiSb, SnTe, Cu-Ni alloys as good thermoelectric materials and even studied PbTe [4].

In this paper, the electric and thermoelectric properties of thin films of germanium–gold alloy (Ge–Au) are discussed in terms of choosing the optimal deposition process and post-processing conditions to obtain Ge–Au layers with the best thermoelectric parameters.

Thin films were fabricated by magnetron sputtering using the Ge–Au alloy target onto glass substrates at two various.

USB1 US09/, USA USB1 US B1 US B1 US B1 US A US A US A US B1 US B1 US B1 Authority US United States Prior art keywords germanium silver boron tin nickel Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.

Affiliations. Department of Physics, Sardar Patel University, Vallabh VidyanagarGujarat, India. Patel & G. Shivakumar; Department of Mechanical. A high temperature thermoelectric semi-conductor material that exhibits its optimum performance within a temperature range of °C.

Silicon-Germanium material most often is used for special thermoelectric power generation applications that utilize a radioisotope/nuclear heat source.

Cite this article as: Kiang, L.L. & Liu, T.L. Lett. Nuovo Cimento () Received 20 October ; First Online   A dimensionless thermoelectric figure-of-merit (ZT) of in p-type nanostructured bulk silicon germanium (SiGe) alloys is achieved, which is about 90% higher than what is currently used in space flight missions, and 50% higher than the reported record in p-type SiGe alloys.

These nanostructured bulk materials were made by using a direct current-induced hot press of mechanically. (3) disordered alloys such as the silver-gold and silver-palladium series. In order to appreciate more clearly the nature of metals and their properties I shall also contrast these with the corresponding properties of semiconductors but our primary interest is in metals and alloys.

THERMOELECTRIC ALLOY SORTER DETAILS: The testing procedure is so simple. Flip the power switch to ON; this starts warming up the Prospector’s probe.

Attach the grounding clip to the test metal. Touch the heated probe to the test metal for one second. See the displayed number. Compare readings to the known sample or the provided chart. The Seebeck coefficient of aluminum is expressed by the empirical formula S = − × 10 −3 T – /T and it changes from − μV/°K at 0°C to − μV/°K at °C.

22,23 The deviation between measured and calculated emf has also been reported and researched by Blatt FJ, et al., in their study on thermoelectric power of dilute. From Abstract: "An extensive compilation is given of the measured values of thermal conductivity for nearly all solid materials from room temperature down to kelvin.

Experimental methods and physical phenomena are discussed in the text and coded in the tables for references for which curves are shown.". We accomplished this with the novel approach of using an enhanced alloy called ‘e-TAGS’ 3–5 —tellurium, silver, germanium, and antimony (Te 50 Ag Ge Sbor TAGS) containing 1% of the rare earth element ytterbium (Yb)—as the p-leg material, and combining it with improved half-Heusler (HH) materials containing.

Thermoelectric has long been recognized as a potentially transformative energy conversion technology due to its ability to convert heat directly into electricity. However, how to optimize the three interdependent thermoelectric parameters (i.e., electrical conductivity σ, Seebeck coefficient S, and thermal conductivity κ) for improving thermoelectric properties is still challenging.

The de Haas-van Alphen Effect in Dilute Alloys of Silver and Gold. King-Smith - - Philosophical Magazine 12 () Thermoelectric Power and Thermal Conductivity in the Silver-Gold Alloy System From °K. Silicon and germanium present distinct and interesting transport properties.

However, composites made of silicon‐germanium (SiGe) have resulted in a breakthrough in terms of their transport properties. Currently, these alloys are used in different applications, such as microelectronic devices and integrated circuits, photovoltaic cells, and thermoelectric applications.

With respect to. The Pioneer missions to Jupiter and Jupiter/Saturn and the Viking Mars Lander missions employed TAGS-2N (lead and germanium telluride derivatives) power conversion devices. Sincesilicon germanium (SiGe) alloys, incorporated into the unicouple device, have evolved as the thermoelectric materials of choice for U.

S. RTG powered space missions.For power generation and waste heat recovery applications, Ferrotec offers thermoelectric modules that have been optimized for efficient performance. In addition to Ferrotec’s thermoelectric modules for power generation, Ferrotec acquired the Telan line of power generation modules and systems in and the company continues to supply.Find all the books, read about the author, and more.

See search results for this author. Are you an author? Learn about Author Central. R. D Barnard (Author) ISBN ISBN Why is ISBN important? ISBN. This bar-code number lets you verify that you're getting exactly the right version or edition of a book.

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