Density and microhardness of glasses in the SrO-B2O3-SiO2 system

N. Tyurnina; Z. Tyurnina; S. Sviridov
April 2009
Glass Physics & Chemistry;Apr2009, Vol. 35 Issue 2, p153
Academic Journal
Abstract  The density d at a temperature of 25°C is measured by the hydrostatic weighing method, the Vickers microhardness H V is determined, and the fluctuation free volume fraction f g is calculated for glasses in the SrO-B2O3-SiO2 system with a constant strontium oxide content in the range from 35 to 45 mol %. It is demonstrated that the quantities H V and f g decrease and the density d increases with an increase in the SrO content.


Related Articles

  • Density Coordinate Mixed Layer Models. Dewar, William K. // Monthly Weather Review;Feb2001, Vol. 129 Issue 2, p237 

    Presents a study on the development of mixed layer models in density coordinates. Background of the study; Details on the numerical examples provided in the study; Discussion.

  • Manufacturing and Characterization of 18Ni Marage 300 Lattice Components by Selective Laser Melting. Contuzzi, Nicola; Campanelli, Sabina L.; Casavola, Caterina; Lamberti, Luciano // Materials (1996-1944);Aug2013, Vol. 6 Issue 8, p3451 

    The spreading use of cellular structures brings the need to speed up manufacturing processes without deteriorating mechanical properties. By using Selective Laser Melting (SLM) to produce cellular structures, the designer has total freedom in defining part geometry and manufacturing is...

  • ISA Certified Control Systems Technician (CCST) Program. Sheble, Nicholas // InTech;Jul2004, Vol. 51 Issue 7, p19 

    This article provides information on specific gravity. It is the ratio of the density of a solid or liquid to the density of water at 4° centigrade. It also refers to the ratio of the density of a gas to the density of dry air at standard temperature and pressure.

  • On being dense. De Grasse Tyson, Neil // Natural History;Jan96, Vol. 105 Issue 1, p66 

    Discusses various aspects of the scientific concept of density. Humorous aspects of the concept; Consideration of the relative densities of different objects; Density of the Earth; Focus on astrophysics in the study of planetary science; Fluctuations of the Hubble constant.

  • Effects of the Absorption of Solar XUV Radiation by the Earth's Upper Atmosphere at Altitudes of 100–500 km in the X-ray Solar Images Obtained Onboard the Coronas-I (TEREK Telescope) and Coronas-F (SPIRIT X-ray Complex) Satellites. Zhitnik, A.; Boyarchuk, K. A.; Bugaenko, O. I.; Ivanov-Kholodnyi, G. S.; Ignat'ev, A. P.; Krutov, V. V.; Kuzin, S. V.; Mitrofanov, A. V.; Oparin, S. N.; Pertsov, A. A.; Slemzin, V. A.; Stepanov, A. I. // Solar System Research;Jul/Aug2003, Vol. 37 Issue 4, p296 

    We consider the effects of the absorption of solar XUV radiation by the Earth's atmosphere that were observed in the solar images obtained with the TEREK-K telescope onboard the Coronas-I satellite in May–June 1994 at low solar activity and with the SPIRIT instrumentation onboard the...

  • TITAN'S ODD ATMOSPHERE. Beatty, J. Kelly // Sky & Telescope;May2005, Vol. 109 Issue 5, p116 

    Presents a question and answer about the atmosphere of Saturn's moon Titan. Factors that contribute to the dense atmosphere of Titan; Explanation to the difference of density between Titan and Jupiter's Ganymede and Callisto despite being about of the same sizes; Influence of the conditions near...

  • BUCKS BY BAROMETER. Mccafferty, Keith // Field & Stream;Sep2004, Vol. 109 Issue 5, pWH4 

    Atmospheric density triggers deer movement. Specifically, it's the rapidly falling barometric pressure that precedes a storm and, less predictably, the rising barometer that follows it. In one North Carolina study, deer biologists captured 68 whitetails in four nights of trapping on a falling...

  • Man's Space Satellites. Berkner, Lloyd V. // Bulletin of the Atomic Scientists;Mar1958, Vol. 14 Issue 3, p106 

    The article discusses the development of space satellites and offers information on its purpose and uses. The satellite provides access to the areas wherein it is difficult for man to observe. It contains a radio receiver which will advise when to release its stored information and a radio...

  • Pseudomomentum diagnostics for two-dimensional stratified compressible flow. Durran, Dale R. // Journal of the Atmospheric Sciences;11/15/95, Vol. 52 Issue 22, p3997 

    Reports on the derivation for the local pseudomomentum density in two-dimensional compressible stratified flow. Comparison with expressions for pseudomomentum in two-dimensional Boussinesq and anelastic flow. Extension of diagnostics to viscous flow and to three-dimensional flows with zero...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics