Elastic moduli of borosilicate glasses doped with heavy metal oxides

Bootjomchai, C.; Laopaiboon, R.; Pencharee, Somkid; Laopaiboon, J.

doi:10.1016/j.jnoncrysol.2014.01.039

Cited by 22 publications

(5 citation statements)

References 36 publications

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“…The compositional dependence of the molar volume on SiO 2 content can be explained taking into account the glass packing density. The glass packing density is defined as the ratio of the minimum theoretical volume occupied by the ions to the corresponding effective volume of the glass [42] (table 2). According to IR analysis, as the SiO 2 content increases, the longer bond length Pb-O will be replaced by the shorter bond length Si-O and there will be plenty of bridging oxygen atoms that make the structure compact and tight [21].…”

Section: Density and Molar Volumementioning

confidence: 99%

Ultrasonic and structural features of some borosilicate glasses modified with heavy metals

Saddeek

2017

Bull Mater Sci

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A quaternary glass system Na 1.4 B 2.8 Si x Pb 0.3−x O 5.2+x , with 0 ≤ x ≤ 0.3, was prepared and studied by Fourier transform infrared spectroscopy, density and ultrasonic techniques to debate the issue of the role of SiO 2 in the structure of lead alkali borate glasses. The results indicate that SiO 2 generates an abundance of bridging oxygen atoms, [BO 4 ] and [SiO 4 ] structural units and changes the bonds B-O-B and Pb-O-B to Si-O-Si and B-O-Si. The latter bonds have higher bond strength and higher average force constant than the former bonds. Therefore, the glass structure becomes contracted and compacted, which decreases its molar volume and increases its rigidity. This concept was asserted from the increase in the ultrasonic velocity, Debye temperature and elastic moduli with the increase of SiO 2 content. The present compositional dependence of the elastic moduli was interpreted in terms of the electron-phonon anharmonic interactions and the polarization of Si 4+ cation. A good correlation was observed between the experimentally determined elastic moduli and those computed according to the Makishima-Mackenzie model.

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Section: Density and Molar Volumementioning

confidence: 99%

Ultrasonic and structural features of some borosilicate glasses modified with heavy metals

Saddeek

2017

Bull Mater Sci

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“…Meanwhile, according to Table 3, an increment at x=0.020 mol for longitudinal modulus indicates some formation of competition between non-bridging oxygen and bridging oxygen within the glass network due to the increase intensity of TeO 4 and accompanied by TeO 3 trigonal pyramid [16]. In general, the elastic moduli of shear modulus and longitudinal modulus decreases with the increase of CuO concentration in this present glass which can also be connected to the average strength of the bond [26].…”

Section: Elastic Propertiesmentioning

confidence: 58%

“…The authors extend their appreciation to the Deanship of Scientific Research at King Khalid University, Saudi Arabia for funding this work through Research Groups Program under grant number R.G.P.2/187/42. 26…”

Section: Acknowledgementmentioning

confidence: 99%

Mechanical and radiation shielding properties of CuO doped TeO2–B2O3 glass system

Nazrin

Sharma

Muhammad

et al. 2022

Radiation Physics and Chemistry

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“…Debye temperature is the value at which all vibration modes in a solid are excited, which is directly proportional to the average speed of sound [11]. The decrease is observed in the average speed of sound and the temperature Debye values, Table 3; that can be attributed to the formation of non-bridging oxygen due to the substitution of the components in the glass matrix, leading to a decrease in the stiffness of the glass [4], [12]. The increasing behavior of acoustic impedance indicates that we have increased resistance to ultrasonic wave propagation in the sample, which can be verified by decreasing velocity as glass increases its density [13].…”

Section: Ultrasonic Studymentioning

confidence: 99%

Ultrasonic measurement and elastic properties of the PbO-SrO-B2O3 glass system

Moya

Reis

Reynoso

et al. 2020

Rev. IBRACON Estrut. Mater.

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The PbO-SrO-B2O3 glass system with the of molar ratio of R (= PbO/B2O3) were prepared by fusion method. The elastic properties have been investigated using longitudinal and transversal ultrasonic wave velocity. Measurements were performed at room temperature and using pulse-echo technique at frequency of 5 MHz. The results indicate that, when increasing R value, the glass network stability decreases. This decrease indicates, of the increase the number of borate structures with non bridging oxygen (NBOs) at the expense of the decrease of borate units with tetrahedral structures. This feature may lead to the more open glass network structures and lower stiffness of the samples studied.

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Elastic moduli of borosilicate glasses doped with heavy metal oxides

Cited by 22 publications

References 36 publications

Ultrasonic and structural features of some borosilicate glasses modified with heavy metals

Ultrasonic and structural features of some borosilicate glasses modified with heavy metals

Mechanical and radiation shielding properties of CuO doped TeO2–B2O3 glass system

Ultrasonic measurement and elastic properties of the PbO-SrO-B2O3 glass system

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