The selected lanthanum-strontium borate glasses were prepared by a conventional melt-quenching technique. The compositions of the investigated glasses were chosen to be: 5.7, 9.5, 14.3, 19.1 mol% for La2O3, 22.9, 19.1, 14.3, 9.5 mol% for SrO and 71.4 mol% for B2O3. The density, molar volume, oxygen molar volume, oxygen packing density, oxygen/boron ratios and structural transformations in the glass network were investigated according to the substitution of SrO by La2O3. The density and the molar volume increased in parallel with La2O3 content increase. Simultaneously, oxygen molar volume values increased while the oxygen packing density values decreased. A hot stage microscope (HSM) and a differential thermal analysis (DTA) were used to determine the characteristic temperatures. By increasing the content of lanthanum, the glass transition temperatures, changed with the same trend as the molar volume. Glass stability parameters were calculated from the temperatures obtained by DTA and H...SM. The HSM results were used to obtain the viscosity curves by applying the Vogel-Fulcher-Tamman (VFT) equation.
Keywords:
DTA / HSM / glass viscosity
Source:
Chemical Industry & Chemical Engineering Quarterly, 2016, 22, 1, 111-115
TY - JOUR
AU - Smiljanić, Sonja
AU - Grujić, Snežana
AU - Tošić, Mihajlo B.
AU - Živanović, Vladimir D.
AU - Matijašević, Srđan D.
AU - Nikolić, Jelena D.
AU - Topalović, Vladimir S.
PY - 2016
UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3451
AB - The selected lanthanum-strontium borate glasses were prepared by a conventional melt-quenching technique. The compositions of the investigated glasses were chosen to be: 5.7, 9.5, 14.3, 19.1 mol% for La2O3, 22.9, 19.1, 14.3, 9.5 mol% for SrO and 71.4 mol% for B2O3. The density, molar volume, oxygen molar volume, oxygen packing density, oxygen/boron ratios and structural transformations in the glass network were investigated according to the substitution of SrO by La2O3. The density and the molar volume increased in parallel with La2O3 content increase. Simultaneously, oxygen molar volume values increased while the oxygen packing density values decreased. A hot stage microscope (HSM) and a differential thermal analysis (DTA) were used to determine the characteristic temperatures. By increasing the content of lanthanum, the glass transition temperatures, changed with the same trend as the molar volume. Glass stability parameters were calculated from the temperatures obtained by DTA and HSM. The HSM results were used to obtain the viscosity curves by applying the Vogel-Fulcher-Tamman (VFT) equation.
PB - Savez hemijskih inženjera, Beograd
T2 - Chemical Industry & Chemical Engineering Quarterly
T1 - Effect of la2o3 on the structure and the properties of strontium borate glasses
EP - 115
IS - 1
SP - 111
VL - 22
DO - 10.2298/CICEQ150213031S
ER -
@article{
author = "Smiljanić, Sonja and Grujić, Snežana and Tošić, Mihajlo B. and Živanović, Vladimir D. and Matijašević, Srđan D. and Nikolić, Jelena D. and Topalović, Vladimir S.",
year = "2016",
abstract = "The selected lanthanum-strontium borate glasses were prepared by a conventional melt-quenching technique. The compositions of the investigated glasses were chosen to be: 5.7, 9.5, 14.3, 19.1 mol% for La2O3, 22.9, 19.1, 14.3, 9.5 mol% for SrO and 71.4 mol% for B2O3. The density, molar volume, oxygen molar volume, oxygen packing density, oxygen/boron ratios and structural transformations in the glass network were investigated according to the substitution of SrO by La2O3. The density and the molar volume increased in parallel with La2O3 content increase. Simultaneously, oxygen molar volume values increased while the oxygen packing density values decreased. A hot stage microscope (HSM) and a differential thermal analysis (DTA) were used to determine the characteristic temperatures. By increasing the content of lanthanum, the glass transition temperatures, changed with the same trend as the molar volume. Glass stability parameters were calculated from the temperatures obtained by DTA and HSM. The HSM results were used to obtain the viscosity curves by applying the Vogel-Fulcher-Tamman (VFT) equation.",
publisher = "Savez hemijskih inženjera, Beograd",
journal = "Chemical Industry & Chemical Engineering Quarterly",
title = "Effect of la2o3 on the structure and the properties of strontium borate glasses",
pages = "115-111",
number = "1",
volume = "22",
doi = "10.2298/CICEQ150213031S"
}
Smiljanić, S., Grujić, S., Tošić, M. B., Živanović, V. D., Matijašević, S. D., Nikolić, J. D.,& Topalović, V. S.. (2016). Effect of la2o3 on the structure and the properties of strontium borate glasses. in Chemical Industry & Chemical Engineering Quarterly
Savez hemijskih inženjera, Beograd., 22(1), 111-115.
https://doi.org/10.2298/CICEQ150213031S
Smiljanić S, Grujić S, Tošić MB, Živanović VD, Matijašević SD, Nikolić JD, Topalović VS. Effect of la2o3 on the structure and the properties of strontium borate glasses. in Chemical Industry & Chemical Engineering Quarterly. 2016;22(1):111-115.
doi:10.2298/CICEQ150213031S .
Smiljanić, Sonja, Grujić, Snežana, Tošić, Mihajlo B., Živanović, Vladimir D., Matijašević, Srđan D., Nikolić, Jelena D., Topalović, Vladimir S., "Effect of la2o3 on the structure and the properties of strontium borate glasses" in Chemical Industry & Chemical Engineering Quarterly, 22, no. 1 (2016):111-115,
https://doi.org/10.2298/CICEQ150213031S . .
