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Saturday, July 18, 2020 | History

2 edition of Pressure and temperature studies of glass properties related to vibrational spectra found in the catalog.

Pressure and temperature studies of glass properties related to vibrational spectra

M. H. Manghnani

Pressure and temperature studies of glass properties related to vibrational spectra

by M. H. Manghnani

  • 286 Want to read
  • 16 Currently reading

Published by Hawaii Institute of Geophysics, University of Hawaii in Honolulu .
Written in English

    Subjects:
  • Glass -- Thermal properties.,
  • Glass -- Spectra.

  • Edition Notes

    Statementby Murli H. Manghnani.
    SeriesHIG ; 74-11, HIG (Series) -- 74-11.
    ContributionsFerraro, John R., 1918-
    The Physical Object
    Paginationiv, 88, [60] p. :
    Number of Pages88
    ID Numbers
    Open LibraryOL21922442M

    These will guide the choice of glass depending on the amount of heat the glass will withstand, and how it cools after the glass is subjected to a rapid change in temperature. Glass may be strengthened to change these thermal properties by heat strengthening, heat tempering, or chemically strengthening. Vibrational dynamics in the glass transition and the cold crystallization process of (S)-4′-(1-methyloctyloxycarbonyl) biphenylyl 4-[7-(2,2,3,3,4,4,4-heptafluorobutoxy) heptyloxy]-benzoate (3F7HPhH7) was studied by Fourier transform infrared spectroscopy (FTIR) during cooling/heating experimental runs. The measured spectra processing was supported by quantum chemical density.

    Temperature e ects in the vibrational spectra of self-assembled monolayers Katrin Forster-Tonigolda;b, Xia Stammer c, Christof W oll and Axel Groˇa;b aHelmholtz Institute Ulm (HIU) Electrochemical Energy Storage, D Ulm, Germany bInstitute of Theoretical Chemistry, Ulm University, D Ulm, Germany cInstitute of Functional Interfaces, Karlsruhe Institute of Technology, D Temperature scales differ in two ways: the point chosen as zero degrees, and the magnitudes of incremental units or degrees on the scale. Commonly used scales. The Celsius scale (°C) is used for common temperature measurements in most of the world. It is an empirical scale that was developed by a historical progress, which led to its zero point 0 °C being defined by the freezing point of.

    Temperature dependent vibrational spectra in non-crystalline materials: application to hydrogenated amorphous silicon By comparing the theoretical and experimental vibrational spectra we demonstrate how to relate vibrational properties to the structural stability, bonding and hydrogen diffusion. namely hydrogen migration and related. temperature is determined from the relative intensities of the H 2 Fulcher-α diagonal bands (d3 3− u → a + g electronic transition; Q-branches with ν = 2,3). The applied method for vibrational temperature determination is based on the assumption that the population of rovibrational levels in the excited (n, ν) state is in accordance with.


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Pressure and temperature studies of glass properties related to vibrational spectra by M. H. Manghnani Download PDF EPUB FB2

PRESSURE AND TEMPERATURE STUDIES OF GLASS PROPERTIES RELATED TO VIBRATIONAL SPECTRA By MURLI N. MANGHNANI Contract NA, NR FINAL REPORT Scientific Officer: Dr. Diness Office of Naval Research DECEMBER Prepared far I OFFICE OF NAVAL RESEARCHj DEPARTMENT OF THE NAVY (CODE ) METALLURGY PROGRAM Cited by: 2.

Pressure and temperature dependence of the elastic moduli of Na2O-TiO2-SiO2 glasses / Murli H. Manghnani --Infrared spectra of several glasses at high pressures / J.R.

Ferraro, M.H. Manghnani, and A. Quattrochi --Infrared absorption spectra of sodium silicate glasses at high pressures / John R. Ferraro and Murli H. Manghnani --Infrared. Pressure and Temperature Studies of Glass Properties Related to Vibrational Spectra Article (PDF Available) December with 26 Reads How we measure 'reads'.

The effect of pressure and temperature on the vibrational spectra of hydrogen bonded systems has been studied on amides, thioamides, carboxylic acids and urea. The compounds under investigation are indicative for the kind of hydrogen bonding changing from pure intermolecular to intramolecular and dimeric by: We have conducted a comprehensive investigation of the optical and vibrational properties of the binary semiconductor SnSe as a function of temperature and pressure by means of experimental and ab initio probes.

Our high-temperature investigations at ambient pressure have successfully reproduced the progressive enhancement of the free carrier concentration upon approaching the Pnma → Bbmm.

Infrared (IR) and Raman are two complementary techniques of vibrational spectroscopy both of which have been used extensively over the years in glass studies.

This chapter introduces infrared spectroscopy and its potential in glass studies with emphasis on. In this work, we study the relaxation behavior of a densified sodium aluminoborate glass by means of coupled Raman spectroscopy, Brillouin spectroscop.

Classical molecular-dynamics simulations have been performed to examine the intricacies and subtleties of the interactions between hen egg-white lysoz. Wortmann's research works with 4, citations and 5, reads, including: The validity of an experiment testing the influence of acceleration on time dilation using a rotating Mössbauer.

Stanek's 25 research works with citations and reads, including: Slowing Down of Molecular Reorientations in [Ni(NH3)6](N03)2. In this work, Neodymium (Nd3+) -doped borate glasses were synthesised by melt-quenching method and their structural as well as optical properties were. Reduced luminous density for float glass is approx.

4cd/m2lux. Micro scratch hardness for float glass is approx. N (Mar resistance-test). The test was originally designed to determine the scratch hardness of plastics. A diamond point with 50 y cone angle and 15 mm point radius is drawn over the glass surface by applying different loads.

Riede's research works with 3, citations and 3, reads, including: Vacancy-Type Defects in Proton-Bombarded InP. Unusual features of the vibrational density of states D(ω) of glasses allow one to rationalize their peculiar low-temperature properties.

Simulational studies of D(ω) have been restricted to. Spectra were stored on a floppy disk (Commodore Model ) and were plotted using an HP Model 74 plotter. The Raman spectra of the cadmium bromide solutions were recorded at 25~ and ~ at 7 MPa pressure in the region 25 cm -1 to cm ~. All spectra were recorded at cm -~ intervals with a 5.

A strong increase in the spectral intensity of Raman scattering (Raman opalescence effect) at the polar soft mode, responsible for the instability of.

Previous studies that have examined both longitudinal and latitudinal spatial variations in the auroral temperature (Miller et al., a; Lam et al., ) have only calculated the rotational temperatures within the v 2 = 1 (n 2) vibrational manifold as a function of spatial position. However, by using the hotband spectral lines, this study.

The current volume in the series, Vibrational Spectra and Structure, is a single topic volume on gas phase structural title of the volume, Equilibrium Structural Parameters, covers the two most common techniques for obtaining gas phase structural parameters: microwave spectroscopy and the electron diffraction the quantum chemical method provides equilibrium.

We have used infrared spectroscopy and complementary theory to study the properties of interstitial H and D in VO2 in the dilute limit to determine the vibrational frequencies, thermal stabilities.

We studied the spin-state dependence of the electrical conductivity of two nanocrystalline powder samples of the spin crossover complex [Fe(pyrazine){Au(CN)2}2]. By applying an external pressure (up to 3 kbar), we were able to tune the charge transport properties of the material from a more conductive low spin state to a crossover point toward a more conductive high spin state.

Determination of the temperature-viscosity relationship of glass, which is essential to determine correct melting and heat treatment regimes in glass manufacture and processing. The temperature-viscosity relationship is directly linked to its chemical composition and our specialist knowledge in glass allows us to provide direct measurement and predictive modelling of this relationship for a.Physical Properties of Gallium Gallium is a soft metal with a very shiny surface.

Pure gallium has a silver-blue kind of colour. The elemental or natural form of gallium is not found in nature. It has to be extracted through smelting or other means. It is hugely different and therefore, not very metal-like. It is soft and can be cut with a knife.In light of these new advances, coupled with previous studies that have utilized terahertz techniques to study clathrates, this study focuses on utilizing pressure-dependent THz-TDS to understand the low-frequency dynamics related to gas capture in hydroquinone (HQ) clathrates.

α-HQ (≥%, obtained from Sigma-Aldrich and used without.