New oxyfluoroniobate glasses

Bouchaour, Z.; Poulain, Marcel; Belhadji, M.; Hager, I.Z.; El-Mallawany, R.

doi:10.1016/j.jnoncrysol.2005.01.081

Cited by 25 publications

(6 citation statements)

References 9 publications

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“…In most cases the melting Temperature (T m ) does not appear in DSC traces, as it is higher than 600°C. An appropriate value may be found by applying the classical two-third rule expressed as T g /T m = 2/3 (Bouchaour et al, 2005).…”

Section: Erjmentioning

confidence: 99%

“…The thermal stability range (T c -T g ) provides a good estimate of the tendency of the glass to crystallization state. It should usually be larger than 100°C to obtain thick samples (Sailaja et al, 2011;Aly et al, 2009;Bouchaour et al, 2005). A popular stability scale is based on the Hruby's criterion (Bouchaour et al, 2005;Pablick, 2009) defined as H r = [(T c -T g )/(T m -T c )].…”

Section: Erjmentioning

confidence: 99%

“…It should usually be larger than 100°C to obtain thick samples (Sailaja et al, 2011;Aly et al, 2009;Bouchaour et al, 2005). A popular stability scale is based on the Hruby's criterion (Bouchaour et al, 2005;Pablick, 2009) defined as H r = [(T c -T g )/(T m -T c )]. H r gives information about the nucleation rate of the sample in (T c -T g ) and growth rate between T m and T c embedded in (T m -T c ).…”

Section: Erjmentioning

confidence: 99%

“…H r gives information about the nucleation rate of the sample in (T c -T g ) and growth rate between T m and T c embedded in (T m -T c ). Another stability scale introduced by (Bouchaour et al, 2005) takes into account the difference between T p and T c , which depends on the width of the crystallization peak. When the (T p -T c ) factor is high the growth rate decreases.…”

Section: Erjmentioning

confidence: 99%

“…When the (T p -T c ) factor is high the growth rate decreases. This criterion is defined as follows: (Bouchaour et al, 2005).…”

Section: Erjmentioning

confidence: 99%

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COMPOSITION DEPENDENT STRUCTURAL AND THERMAL PROPERTIES OF SM2O3 DOPED ZINC FLUOROBORATE GLASSES

Ajithkumar¹

2013

Energy Research Journal

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Glasses based on Sm 3+ doped zinc fluoroborate have been synthesized and characterized. Formation of glass has been investigated in the 30 ZnF 2 -20 TeO 2 -(50-x) B 2 O 3 -x Sm 2 O 3 matrix. Fast quenching is required to prevent melt crystallization and adequate heat treatment to diminish thermal stress, which results in an efficient amorphous material. The Differential Scanning Calorimeter (DSC), Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Analysis (EDAX), stability, density and refractive index have been recorded, calculated, measured and analyzed for the glass samples with different concentrations of Sm 3+ ranging between 0 to 3 mol%. Density increases as dopant concentration increases and glass transition temperature T g ranges between 395 and 420ºC. The increase of molar volume with Sm 2 O 3 content indicates that the extension of glass network is due to the increase of the number of NBOs. The results found in this investigation showed that the refractive index of glass does not only depend on the density but also depends on the electronic polarizability of the glass. The increasing stability of the glass samples shows that they are thermally resistant. The presence of NBOs in the glass network is also approved by the decrease in glass transition temperature (T g ). The variation of the properties with different composition of dopant plays a dominant role in determining a good host material in the field of optics and photonics.

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Section: Erjmentioning

confidence: 99%