Journal ArticleDOI
High‐temperature Brillouin scattering in fused quartz
J. A. Bucaro,H. D. Dardy +1 more
TLDR
In this paper, the shear and longitudinal Brillouin shifts, longitudinal linewidth, Pockel's coefficient, and the Landau-Placzek ratio were measured in fused silica from room temperature, through the glass transition temperature (1200°C), and up to near the melting temperature of quartz (∼1700°C).Abstract:
Thermal Brillouin scattering has been studied in fused silica from room temperature, through the glass transition temperature (1200°C), and up to near the melting temperature of quartz (∼1700°C). The shear and longitudinal Brillouin shifts, the longitudinal linewidth, Pockel's coefficient, and the Landau‐Placzek ratio are measured. From these the behavior of the elastic moduli and absorption coefficient with temperature are obtained. A significant change in the temperature dependence of the moduli and Pockel's coefficient is found to occur above 500°C. In addition, by using the Landau‐Placzek ratio the first measurement in fused quartz of the equilibrium static compressibility above the glass transition has been obtained. Surprisingly little temperature dependence is observed.read more
Citations
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Elastic Properties and Short-to Medium-Range Order in Glasses
TL;DR: In this paper, the elastic properties of glass have been analyzed at the nanoscale and it was shown that Young's modulus (E) and Poisson's ratio (ν) at the continuum scale allow to get insight into the short and medium-range orders existing in glasses.
Journal ArticleDOI
Structural relaxation in silicate melts and non-Newtonian melt rheology in geologic processes
TL;DR: In this article, the authors quantified the relaxation time of a viscoelastic material using the Maxwell relationship and showed that the shear modulus is a constant relative to the volume relaxation time.
Journal ArticleDOI
Relaxation in silicate melts;Relaxation in silicate melts
TL;DR: In this paper, a series combination of Hookean spring and Newtonian dashpot (a Maxwell element) is used to predict the timescale corresponding to the glass transition from the ratio of the relaxed viscosity to the infinite frequency elastic modulus.
Journal ArticleDOI
Ultrasonic studies of silicate melts
TL;DR: In this paper, the compositional dependence of the ultrasonic velocity and absorption of 32 silicate melts has been determined as a function of temperature (1175-1925 K) and frequency (3-12 MHz).
Journal ArticleDOI
Potential of stimulated Brillouin scattering as sensing mechanism for distributed temperature sensors
TL;DR: In this paper, it was demonstrated that stimulated Brillouin scattering (SBS) occurring in the core of an optical fiber can be used in the construction of a distributed temperature sensor.
References
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Journal ArticleDOI
Excitation and Attenuation of Hypersonic Waves in Quartz
H. E. Bömmel,K. Dransfeld +1 more
Journal ArticleDOI
Photoelastic Constants of Vitreous Silica and Its Elastic Coefficient of Refractive Index
William Primak,Daniel Post +1 more
TL;DR: The photoelastic constants and their dispersion for visible light were determined for two samples of vitreous silica, Corning and Herasil No. 1, and the results for the mercury green line, 546 mμ, are quoted here as mentioned in this paper.
Journal ArticleDOI
Ultrasonic Absorption in Fused Silica at Low Temperatures and High Frequencies
Orson L. Anderson,H. E. Bömmel +1 more
TL;DR: In this paper, the absorption of high-frequency (60 kc. to 20 me. per second) sound waves in fused silica shows a large peak at low temperatures (30° to 50°K).
Journal ArticleDOI
Brillouin Scattering: Viscoelastic Measurements in Liquids
TL;DR: The theory of Rayleigh scattering from density fluctuations is applied to data taken in glycerol and n-butanol over wide temperature ranges as discussed by the authors, which is useful in evaluating the viscoelastic parameters of a liquid when all corrections are properly applied.