TY - CONF A1 - Weh, Lothar A1 - Müller, Ralf A1 - Moseler, D. A1 - Heide, G. A1 - Frischat, G. T1 - Topographische Untersuchungen von Glasoberflächen mit Vickers-Eindrücken T2 - 74. Glastechnische Tagung CY - Ulm, Deutschland DA - 2000-05-29 PY - 2000 SP - 237 EP - 240 PB - DGG, Dt. Glastechn. Ges. CY - Frankfurt/M. AN - OPUS4-934 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Müller, Ralf A1 - Prado, M. O. A1 - Zanotto, E. D. T1 - Model for sintering polydispersed glass particles N2 - We propose a model to describe the sintering kinetics of polydispersed glass particles, having no adjustable parameter. The model is based on three sintering stages: a pure ‘Frenkel' (F) first step, a mixed ‘Frenkel/Mackenzie–Shuttleworth' stage, and a third, pure ‘Mackenzie–Shuttleworth' (MS) step. The model considers sample shrinkage as the sum of the partial shrinkage of several clusters, each consisting of equally sized particles and each showing independent F or MS behavior. The overall set of clusters mimics the specimen's real particle size distribution. We then introduce the concept of neck forming ability, which allows the formation of necks among particles of different sizes, relaxing the clustering condition. Using experimental physical parameters: particle size distribution, viscosity, surface energy, and the theoretical neck forming ability, the model describes well the sintering kinetics of an alumino-borosilicate glass powder having polydispersed, irregular shaped particles in a variety of temperatures. The sintering kinetics of the real powder is slower, but not far from the calculated kinetics of a monodispersed distribution containing only particles of average size. Thus the model provides a tool for estimating the sintering kinetics of real glass powders, for any size distribution and temperature, thus minimizing the number of laboratory experiments. PY - 2001 U6 - https://doi.org/10.1016/S0022-3093(00)00399-9 SN - 0022-3093 VL - 279 IS - 2-3 SP - 169 EP - 178 PB - North-Holland Publ. Co. CY - Amsterdam AN - OPUS4-935 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Müller, Ralf A1 - Weh, Lothar A1 - Reinsch, Stefan T1 - Oberflächenprofile partiell kristallisierter Silikatgläser T2 - 73. Glastechnische Tagung CY - Halle (Saale), Deutschland DA - 1999-05-31 KW - Kristallisation KW - Silikatgläser PY - 1999 SP - 26 EP - 29 CY - Frankfurt/Main AN - OPUS4-819 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Reinsch, Stefan A1 - Chládek, Jirí A1 - Müller, Ralf A1 - Weh, Lothar T1 - Viskoses Fließen und Oberflächenkristallisation an Vickerseindrücken T2 - 76. Glastechnische Tagung CY - Bad Soden, Deutschland DA - 2002-05-27 PY - 2002 SP - 250 EP - 253 PB - DGG, Deutsche Glastechnische Gesellschaft e.V. CY - Frankfurt/M. AN - OPUS4-1872 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Chládek, Jirí A1 - Müller, Ralf A1 - Weh, Lothar A1 - Reinsch, Stefan T1 - Surface Crystallisation Patterns Caused by Vickers Indentation T2 - Proceedings of workshop 2002 ; 10th Annual University-wide Seminar Workshop 2002 CY - Prague, Czech Republic DA - 2002-02-11 PY - 2002 SN - 80-01-02511-X VL - 6A SP - 610 EP - 611 PB - Czech Technical University CY - Prague AN - OPUS4-1870 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Gaber, Martin A1 - Müller, Ralf A1 - Brzezinka, Klaus-Werner A1 - Peuker, Christel A1 - Langer, A. T1 - Analyse von Wasserstoff in Quarzglas T2 - 76. Glastechnische Tagung CY - Bad Soden, Deutschland DA - 2002-05-27 PY - 2002 SP - 242 EP - 245 PB - DGG, Deutsche Glastechnische Gesellschaft e.V. CY - Frankfurt/M. AN - OPUS4-1636 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Schiller, Wolfgang Arno A1 - Eberstein, Markus A1 - Müller, Ralf T1 - Glass Ceramic Composites for Microsystems PY - 2003 SN - 0927-4472 VL - 76 C1 SP - 54 EP - 59 PB - Elsevier CY - Amsterdam AN - OPUS4-2592 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Reinsch, Stefan A1 - Müller, Ralf T1 - Kristallwachstumsgeschwindigkeit und -mechanismen von mu-Cordierit zwischen 800 und 1350°C T2 - 77. Glastechnische Tagung CY - Leipzig, Deutschland DA - 2003-05-26 PY - 2003 VL - 77 SP - 1 EP - 4 PB - DGG CY - Offenbach AN - OPUS4-2526 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - de Moraes, Flavia A1 - Frischat, G. H. A1 - Heide, G. A1 - Müller, Wolfgang A1 - Müller, Ralf T1 - Korrosions- und Kristallisationsphänomene an der Innenoberfläche von Glasbausteinen T2 - 77. Glastechnische Tagung CY - Leipzig, Deutschland DA - 2003-05-26 PY - 2003 VL - 77 SP - 71 EP - 74 PB - DGG CY - Offenbach AN - OPUS4-2527 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Altantsog, Pagvajav A1 - Ojunbileg, L. A1 - Tserenshimed, M. A1 - Chadraabal, Shgdariin A1 - Müller, Ralf A1 - Nofz, Marianne A1 - Gaber, Martin A1 - Batdemberel, G. A1 - Sangaa, D. T1 - Some experimental results of glass melting by using sands from Buir nuur PY - 2002 VL - 1 SP - 103 EP - 118 AN - OPUS4-3113 LA - mon AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -