National Repository of Grey Literature 10 records found  Search took 0.01 seconds. 
Evaluation of selected parameters of a LIBA2000 glass melt according to ISO 12123.
Václavík, Jan
Measurement of refractive indices of samples, specifically refractive indicies nd, ne and Abbe numbers for spectral lines d and e. Assesment of refractive index variation, internal spectal transmitance and amount of striae in samples.\n
Chování bublin v tavenině v rotujícím válci
Tonarová, V. ; Němec, Lubomír ; Jebavá, Marcela
The goal of this work is to present results of the matematical modeling of bubble behaviour in the centrifugal field.
Vliv proudění skloviny v horizontálním kanálu
Cincibusová, P. ; Němec, Lubomír ; Jebavá, Marcela
This paper deals with removal of single bubbles in horizontal channels with different character of glass flow.
Bubble behavior in rotating cylinder with glass melt
Tonarová, V. ; Němec, Lubomír
Bubble removing during glass melting may be a slow process if only the gravitatiuonal force determines its rate. This wwork brings derivation of relations governing the one and multicomponent bubble behavior in a rotating cylindr.
Bubble distribution in Channels with glass melt
Cincibusová, P. ; Němec, Lubomír
Equations were derived describing bubble distribution in horizontal and vertical channels with glass melt.
Redox equilibria of sulphur in glassmelts
Kloužek, Jaroslav ; Němec, Lubomír ; Arkosiová, Miroslava
The combination of experimental and computational methods used for the study of redox equilibria of sulphur in glassmelts makes possible to reveal mechanism and time sequence of redox phenomena taking place during melting process. Both methods were applied for the optimization of sc. reducing sulphate refining realized by the addition of sulphate and reducing agent to the glass batch. The results of experiments supported by the model calculation showed that proper combination of both components at the same time improves homogenization and refining of glass melt and suppresses unwanted bubble nucleation at maximal melting temperatures.
Voltametry measurement of the glass melts
Štáhlavský, O. ; Míka, M. ; Vondrák, Jiří
We have developed a complex mathematical model of glass melting and vitrification processes.
Verification of refining models and their application
Kloužek, Jaroslav ; Němec, Lubomír ; Jebavá, M. ; Trochta, M. ; Brada, J.
The study compares two models of single bubble behavior in glass melts.
Modular models of the glass melting process
Němec, Lubomír ; Jiřička, M. ; Kloužek, Jaroslav
The results of analysis of the glass melting process lead to the conclusion that the optimum dissolut.
Voltammetric measurement of the Pt electrode capacity and the determination of the polyvalent ions diffusion coefficients in the glass melt
Rohanová, D. ; Vondrák, Jiří
The temperature dependence of diffusion coefficients of the polyvalent ions (iron and chromium)is one of characteristic structure parameters in given glass melt. The new voltammetry arrangement with triangular shape of the potential and the three-elec

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