Glass manufacturing clearly represents a challenge for an automation engineer as it is a very complex process with complicated, nonlinear and sometimes not completely understood dynamical behavior. So it is still common that furnaces are controlled by simple controllers such as PID regulators or by manual interventions of furnace operators. As a result, the process may be kept in suboptimal con...

Glass-ceramics based on the Eu/Dy-doped Sr2MgSi2O7 phosphor have been obtained from sintering and crystallization of glass powders. Electric gas furnaces were employed for melting. The doped parent glasses show red emission under excitation UV light whereas corresponding glass-ceramics blue emission. microstructure crystals responsible observed by scanning electron microscopy-cathodoluminescenc...

mixtures strives to develop a product with good shelf life and that allows efficient dissolution by the end user with minimal change to the properties of the drug. One of the key properties used in the design of the formulations is the glass transition temperature, Tg, which must be sufficiently above the storage temperature to limit any degradation properties from occurring at significant rate...

In reactor furnace, due to high temperature and high pressure, data can be measured only near the furnace wall. In this paper, the way to estimate temperature distribution in a reactor furnace using measured data near the furnace walls and to control temperature distribution to the desired temperature distribution was studied. In the estimation, SQP method is employed using measured data near t...

This paper presents a case study on the design of a draw capstan drive with feedback control for use in optical fiber manufacturing. Optical fiber is manufactured by the draw process, which involves heating and pulling high purity glass cylinders to diameters of 125 micron. Of critical concern is producing a constant diameter for the glass fiber and its lightguide core. The diameter of the opti...

The High-Velocity Suspension Flame Spraying (HVSFS) technique was employed in order to deposit bioactive glass coatings onto titanium substrates. Two different glass compositions were examined: the classical 45S5 Bioglass and a newly-developed SiO2–CaO–K2O–P2O5 glass, labelled as “Bio-K”. Suitable raw materials were melted in a furnace and fritted by casting into water. The frit was dry-milled ...