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Ultrasonic investigations of some bismuth borate glasses doped with Al2O3

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Abstract

The velocities of longitudinal and transverse ultrasonic waves in different compositions of 5Al 2O3–29Na 2O–(66 − x) B2O3−xBi2O3 glass system were measured at 4 MHz at room temperature using the pulse-echo technique. The velocity data were used to determine the elastic moduli and the dimensionality of the studied glasses. The observed changes in the elastic moduli of the glasses were related to the modifier role of Bi 2O3 content. The results revealed that the density increased with increasing Bi 2O3 content, which was attributed to the increase in the compactness and packing of the glass network. The ultrasonic data were analysed in terms of creation of new bonds of Bi 2O3 attached to the structural units of the borate network. The new bonds decreased the average crosslink density and the number of network bonds per unit volume along with a weakening of the different modes of vibrations, which in its turn decreased the ultrasonic velocity. Quantitative analysis was carried out using Makishima–Mackenzie model in order to obtain more information about the rigidity of these glasses.

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Authors and Affiliations

  1. Faculty of Science, Physics Department, Al-Azhar University, Assiut, Egypt

    YASSER B SADDEEK

  2. Glass Research Department, National Research Center, Dokki, Cairo, Egypt

    MOENIS A AZOOZ

  3. Faculty of Engineering, Civil Engineering Department, Beni-Suef University, Beni-Suef, Egypt

    AMR BAKR SADDEK

Authors
  1. YASSER B SADDEEK
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  2. MOENIS A AZOOZ
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  3. AMR BAKR SADDEK
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Correspondence to YASSER B SADDEEK.

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SADDEEK, Y.B., AZOOZ, M.A. & SADDEK, A.B. Ultrasonic investigations of some bismuth borate glasses doped with Al2O3 . Bull Mater Sci 38, 241–246 (2015). https://doi.org/10.1007/s12034-014-0801-z

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  • DOI: https://doi.org/10.1007/s12034-014-0801-z

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