Thermal properties of multicomponent tellurite glass

Journal of Materials Science (Impact Factor: 2.37). 04/2008; 43(15):5131-5138. DOI: 10.1007/s10853-008-2737-4


Quaternary tellurite glass systems of the form 80TeO2–5TiO2–(15−x)WO3−xAnOm where AnOm is Nb2O5, Nd2O3, and Er2O3, x=0.01, 1, 3, and 5mol% for Nb2O5 and x=0.01, 0.1, 1, 3, 5, and 7mol% for Nd2O3 and Er2O3, have been prepared by the melt quenching. Density and molar volumes have been measured and calculated for every glass system.
The thermal behavior of the glass series was studied by using the differential thermal analysis DSC. Glass transition temperature
g, crystallization temperature T
c, and the onset of crystallization temperature T

were determined. The glass stability against crystallization S (≈100°C) and glass-forming tendency K
g (≈0.3) have been calculated. Specific heat capacity C
p (≥1.4J/g°C) was measured from room temperature and above the T
g for every composition in each glass series. Quantitative analysis of the above thermal properties of these new tellurite
glass with the structure parameters like average cross-link density
$ \ifmmode\expandafter\bar\else\expandafter\=\fi{n}_{{\text{c}}} $ \ifmmode\expandafter\bar\else\expandafter\=\fi{n}_{{\text{c}}} (≥2.4), number of bonds per unit volume n
b (≥8×1028cm−3), and the average stretching force constant (F) have been studied for every glass composition.

Download full-text


Available from: R. El-Mallawany,
    • "The properties of the host material are very important to study before being doped with any rare-earth elements. Some of the fundamental aspects of tellurite glasses such as glass structure, physical, thermal, optical and other spectroscopy properties have been extensively studied [3] [4] [5] [6] [7] [8] [9] [10] [11] [12]. "
    [Show abstract] [Hide abstract]
    ABSTRACT: Ternary lithium boro-tellurite systems in the form 75TeO2−xB2O3-(25−x) Li2O and 80TeO2-xB2O3-(20−x) Li2O where, x= 5, 10 and 15 mol% have been prepared by the melt quenching technique. UV- spectra of the prepared glasses in the range 200-550 nm has been recorded at room temperature. The cut-off wavelength (νc), optical band gap (Eopt) and Urbach energy (∆E) were calculated from optical absorption data. Differential scanning calorimetry (DSC) has been carried out on the prepared glass systems in the temperature range 400-800 K. The glass transition Tg and crystallization Tc temperatures values were measured from DSC thermo-gram. Activation energy for transition Et, activation energy for crystallization Ec and order of crystallization have been calculated for every glass composition.
    Ceramics International 04/2015; 41(3):3561-3567. DOI:10.1016/j.ceramint.2014.10.182 · 2.61 Impact Factor
  • Source
    • "TeO 2 -based glasses have wide glass forming range and useful properties such as low melting temperature, high dielectric constant, high refractive index, low phonon energy and good transmittance of infrared radiation (0.4–6 μm); therefore, tellurite glasses have attracted significant interest over many years for application in non-linear optical devices , optical fiber amplifiers, lasers, solid state batteries, etc. [1] [2] [3] [4] [5]. "
    [Show abstract] [Hide abstract]
    ABSTRACT: Borotellurite (xB2O3–(100 − x)TeO2; x = 15, 20, 25, 30 and 35 mol.%) and alumino-borotellurite (yAl2O3–10B2O3–(100 − y)TeO2; y = 5, 10, 20 and 30 mol.%) glasses are prepared and studied by X-ray diffraction, density, differential scanning calorimetry, thermo-gravimetric analysis, UV–visible, infrared and Raman spectroscopy. Borotellurite glasses are hygroscopic and on crushing into powder, they absorb atmospheric water vapors to form crystalline precipitates of TeO2 in an amorphous matrix; the chemical durability of these glasses deteriorates with increasing B2O3 concentration. The refractive index of borotellurite glasses decreases from 2.29 to 2.26 while the glass transition temperature increases from 339 to 366 °C with an increase in B2O3 mol.%. The short-range structure of glasses consists of TeO4, TeO3, BO4 and BO3 structural units. Using the ratio of the areas under TeO4/TeO3 and BO4/BO3 Raman and infrared bands respectively, the Te 2 3 2 3 2 3
    Journal of Non-Crystalline Solids 11/2014; 404:116–123. DOI:10.1016/j.jnoncrysol.2014.08.002 · 1.77 Impact Factor
  • Source
    • "The propagation of ultrasonic waves in solids provides valuable information about the solid state motion in the material. In recent years, the subject of glasses has rapidly increased because of their various applications in electronics, nuclear and solar energy technologies, and acoustooptic devices [11] [12]. The acoustic wave propagation in bulk glasses has been of considerable interest to understand their mechanical properties. "
    [Show abstract] [Hide abstract]
    ABSTRACT: New ternary zinc oxyfluorotellurite (ZOFT) with the composition ( ZnO ) x - ( AlF 3 ) y - ( TeO 2 ) z , where 5 ≤ x < 35 ; 5 ≤ y ≤ 25 ; 60 ≤ z ≤ 70 , has been successfully prepared by the conventional rapid melt quenching technique. Density, molar volume, and glass transition temperature have been assessed for each ZOFT glass sample. The longitudinal and transverse ultrasonic waves propagated in each glass sample were measured using a MBS8020 ultrasonic data acquisition system at 5 MHz frequency and room temperature. The longitudinal modulus ( L ), shear modulus ( G ), Young’s modulus ( E ), bulk modulus ( K ), and Poisson’s ratio ( σ ) are assessed from both velocity data and their respective density. The compositional dependence of the ultrasonic velocities and related parameters are discussed to understand the rigidity and compactness of the glass system studied.
    Advances in Condensed Matter Physics 01/2014; 2014(3):1-7. DOI:10.1155/2014/174362 · 0.86 Impact Factor
Show more