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Structural and acoustic investigations of calcium borate glasses
Author(s) -
Thind K. S.,
Sharma G.,
Rajendran V.,
Singh K.,
Gayathri Devi A. V.,
Aravindan S.
Publication year - 2006
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200622140
Subject(s) - debye model , boron , materials science , attenuation , calcium , analytical chemistry (journal) , acoustic attenuation , mineralogy , chemistry , thermodynamics , optics , physics , metallurgy , organic chemistry , chromatography
Acoustic and structural properties of x CaO · (1– x ) B 2 O 3 (0.2 ≤ x ≥ 0.7) glass system have been studied at ambient temperature. The ultrasonic velocity and attenuation for different compositions of calcium borate glasses were measured at 5 MHz at room temperature (303 K) using a pulse echo overlap method. The elastic moduli, Debye temperature, Poisson's ratio and other acoustic parameters have been obtained from experimental data. Fourier transform infrared spectroscopic analysis has been used to further support the results of acoustic studies. The results obtained indicate that the calcium oxide enters the glass network as a modifier by occupying the interstitial spaces in the network and by increasing the nonbridging oxygen atoms (NBOs). (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)