TY - JOUR A1 - Reinsch, Stefan A1 - Rössler, C. A1 - Bauer, Ute A1 - Müller, Ralf A1 - Deubener, J. A1 - Behrens, H. T1 - Water, the other network modifier in borate glasses JF - Journal of non-crystalline solids N2 - In the present study we have investigated whether the effect of water on properties of borate glasses resembles that of alkali oxide. Soda-lime-borate glasses with nominal compositions of x Na2O, 10 CaO, (90-x) B2O3 (x = 5, 15 and 25 mol%) were doped with up to 8 wt.% H2O by processing glass powder + distilled water in platinum capsules in an internally heated gas pressure vessel at 1523 K and 500 MPa. The water content of hydrous glasses was determined by Karl-Fischer titration and near-infrared spectroscopy. The glass transition temperature T-g. was derived from DTA and micropenetration experiments for which the effect of water loss at the surface of the hydrous glasses was studied. Heating glass samples at 10 K min(-1) in the DTA resulted in T-g values which are close to T-12 isokom temperatures confirming the equivalence of enthalpy relaxation and viscous relaxation for borate glasses. For all three glass series it is shown that T-g strongly decreases whereas the liquid fragility strongly increases upon the addition of water. These findings reveal that H2O primarily causes breaking of B-O-B bonds rather than supporting 4-fold coordinated boron as it is well-known for alkali oxides in this concentration range. (C) 2015 Elsevier B.V. All rights reserved. KW - Wasserhaltige Gläser KW - Viskosität KW - Boratgläser KW - Thermische Analyse KW - Viscosity KW - Borate glasses KW - Thermal analysis KW - Water-bearing glasses PY - 2016 DO - https://doi.org/10.1016/j.jnoncrysol.2015.10.010 SN - 0022-3093 VL - 432 SP - 208 EP - 217 PB - Elsevier B.V. CY - Amsterdam AN - OPUS4-35123 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Eschlböck-Fuchs, S. A1 - Huber, N. A1 - Ahamer, C. M. A1 - Hechenberger, J. G. A1 - Kolmhofer, P. J. A1 - Heitz, J. A1 - Rössler, R. A1 - Demidov, Alexander A1 - Schmid, Thomas A1 - Gornushkin, Igor B. A1 - Panne, Ulrich A1 - Pedarnig, J. D. T1 - Application of laser-induced breakdown spectroscopy for the analysis of slags in industrial steel production T2 - Tagungsband – 11. Kolloquium Prozessanalytik N2 - Laser-induced breakdown spectroscopy (LIBS) is a fast and versatile technique for (semi) quantitative element analysis of solids, liquids, gases, and particulate matter. The LIBS method is used for optical sensing in various branches of industrial production. In the contribution we review some of our recent results on LIBS analysis of slags from secondary metallurgy in industrial steel making. Major oxides in steel slags are measured at-line and after homogenization using a calibration-free (CF) method. Two approaches for CF analysis based on the Boltzmann plot method and on the calculation of synthetic spectra are compared for the analysis of quaternary oxides. We also present the research in cooperation with our industrial partners in the process-analytical chemistry network PAC. T2 - 11. Kolloquium Arbeitskreis Prozessanalytik CY - Vienna, Austria DA - 30.11.2015 KW - Laser-induced breakdown spectroscopy (LIBS) KW - Process analytical technology KW - Steel slag PY - 2015 PB - Plandruck+ Gesellschaft m.b.H. CY - Wien AN - OPUS4-39005 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Rößler, C. A1 - Reinsch, Stefan A1 - Bauer, Ute A1 - Deubener, J. A1 - Müller, Ralf A1 - Behrens, H. T1 - Relaxation and sub-critical crack growth in molecular water bearing glasses T2 - 88. Glastechnische Tagung DGG - ACerS GOMD 2014 T2 - 88. Glastechnische Tagung DGG - ACerS GOMD 2014 CY - Aachen, Germany DA - 2014-05-26 PY - 2014 AN - OPUS4-30812 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Rößler, C. A1 - Reinsch, Stefan A1 - Bauer, Ute A1 - Pönitzsch, A. A1 - Deubener, J. A1 - Behrens, H. A1 - Müller, Ralf T1 - The role of volatiles in mechanical behavior of oxide glasses: III. Indentation studies on hydrous borate glasses T2 - FFAG-6, 6th International Workshop on Flow and Fracture of Advanced Glasses T2 - FFAG-6, 6th International Workshop on Flow and Fracture of Advanced Glasses CY - Weimar, Germany DA - 2014-10-07 PY - 2014 AN - OPUS4-32340 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Westendarp, A. A1 - Reschke, T. A1 - Kühne, Hans-Carsten A1 - Maultzsch, Matthias A1 - Dauberschmidt, C. A1 - Rößler, G. T1 - Instandsetzung von Wasserbauwerken aus Beton; Teil 2 JF - Beton KW - Instandsetzung KW - Beton KW - Wasserbau KW - Spritzmörtel KW - Geringer fester Beton KW - ZTV-LB 219 PY - 2006 SN - 0005-9846 VL - 55 IS - 3 SP - 94 EP - 100 PB - Verlag Bau + Technik CY - Erkrath AN - OPUS4-12347 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Westendarp, A. A1 - Reschke, T. A1 - Kühne, Hans-Carsten A1 - Maultzsch, Matthias A1 - Dauberschmidt, C. A1 - Rößler, G. T1 - Instandsetzung von Wasserbauwerken aus Beton; Teil 1 JF - Beton KW - Instandsetzung KW - Beton KW - Wasserbau KW - Spritzmörtel KW - Geringer fester Beton KW - ZTV-LB 219 PY - 2006 SN - 0005-9846 VL - 56 IS - 1+2 SP - 22 EP - 29 PB - Verlag Bau + Technik CY - Erkrath AN - OPUS4-12348 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -