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Joint Workplace of The UCT Prague and The Institute of Rock Structure and Mechanics, v.v.i.
 Technická 5 
 166 28 Prague 6 – Dejvice
 IČO: 60461373 / VAT: CZ60461373
 
 Czech Post certified digital mail code: sp4j9ch
 
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Laboratory of Inorganic Materials is joint working place of the University of Chemistry and Technology Prague and the Institute of rock structure and mechanics ASCR, v.v.i. Laboratory activity evenly covers the area of education and both basic and applied research.

In the pedagogical field we are involved in the education of the bachelor study program Chemistry and Materials Technology, master's degree program Inorganic Non-metallic Materials and postgraduate program Chemistry and Technology of Inorganic Materials.
      
Our research activities are focused on the study of glass melting processes and materials for applications in photonics.


 
Melting space for the vitrification of radioactive materials












For students

Interesting topics of student works
Excellently equipped laboratories
Pleasant working environment


Research areas

Melting processes and their simulation
New glass melting concepts
Development of new glasses
Materials for photonics




Bubble in glass containig Na2SO4 condensate
 



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Laboratory members are involved in the education within bachelor and master study programs Chemistry and Materials. Doctoral students of the study program Chemistry and Technology of Inorganic Materials work closely with us when assisting solved research projects, completing required coursework and writing and defending a dissertation about their research project.



 





The result of the mathematical model of the flow in the melting chamber - sectional view showing the formation of spiral flow, which allows to increase the efficiency of the melting process.

Image analysis - measurement of the size of a bubble in the melt.




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Laboratory of Inorganic Materials was created from the original Laboratory for chemistry and technology of silicates and ICT Prague and ASCR founded in 1961. In 2012, the Laboratory was transformed into a Joint workplace of the University of Chemistry and Technology Prague UCT Prague) and the Institute of Rock Structure and Mechanics ASCR, v.v.i. The Laboratory cooperates with materials-oriented UCT Prague departments, especially the Department of glass and ceramics. In addition to the labs in UCT Prague (Building A, Room A04), we also work at the Institute of Rock Structure and Mechanics ASCR v.v.i., V Holešovičkách 41, 180 00 Prague 8.




Temperature distribution on the top melt level in a glass melting space 

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Postgraduate study programme: Chemistry and Technology of Materials
Field of study: Chemistry and technology of inorganic materials
Themes of the postgraduate studies





Homogenization processes in glass preparation by melting

Supervisor: Prof. Ing. Lubomír Němec, DrSc.
Supervisor specialist: Doc.Ing. Jaroslav Kloužek, CSc.
The glass preparation from crystalline raw materials involves several processes which form a homogeneous glass melt from the arising mixture of melt, undissolved particles and bubbles. The kinetics of the dissolution and separation (bubble removal) processes in the stage of melt affects substantially the energy consumption and melting performance of the glass melting spaces. The significant factors of enhancement of the dissolution processes are the natural and forced convection of the melt whereas the application of an additive force as the centrifugal force, e.g., accelerates the bubble separation from the melt. The important role of process topology in the continuous melting space is described by a new relative quantity called utilisation of the space. The space utilisation can be significantly affected by the character of the melt flow in the space. The topic applies the mathematical modelling of dissolution and separation processes in the melting spaces in order to define the optimal conditions and design of the glass melting spaces.
 









Heavy metal oxide glasses

Supervisor: Doc. Ing. Jaroslav Kloužek, CSc.
Supervisor specialist: Ing. Petr Kostka, Ph.D.
The glass network of heavy metal oxide glasses is formed by oxides such as TeO2, GeO2 or Sb2O3 instead of SiO2. These glasses stand out in comparison with conventional glasses particularly by wide interval of transparency ranging up to much longer wavelengths, lower phonon energies, higher refractive index, outstanding nonlinear properties, high solubility of rare-earth ions accompanied by high quantum yield of radiative transition etc. The work will focus on the preparation and characterization of new materials – glasses – containing antimony and/or bismuth oxides. Characterization of the prepared materials will include their basic properties such as density, molar volume, thermal stability, chemical resistance, hardness, optical transmission, refractive index, etc. Correlation between structural units forming the glass network and the resulting properties will be investigated and the influence of processing conditions during glass preparation on these properties will be evaluated.
 





Chalcogenide glasses and optical fibres

Supervisor: Doc. Ing. Jaroslav Kloužek, CSc.
Supervisor specialist: Ing. Petr Kostka, Ph.D.
Glass network of chalcogenide glasses is formed by S, Se or Te in combination with metals and/or semimetals. The presence of oxygen in these materials is usually undesirable. Real applications of this type of glass are conditioned mainly by high purity of the prepared or manufactured materials. Procedures for preparing high-purity chalcogenide glasses allowing for their use in fiber optics, already exist. The work will include the preparation of chalcogenide glasses, optimization of their composition, dotation of materials by rare earth ions and examination of the relationship between the vitreous matrix and the dopant. It is also possible to focus some of the efforts on new technological procedures for further material purification. The subsequent step will be to prepare preforms for optical fibres drawing, including the processing of structured preforms for drawing optical microstructured fibres (photonic crystal fibres) and characterization of prepared fibres.
 





Modeling of new glass melting spaces

Supervisor: Prof. Ing. Lubomír Němec, DrSc.
Supervisor specialist: Ing. Marcela Jebavá, Ph.D.
The new glass melting spaces are focused on the considerable decrease of the specific energy consumption joint with CO2 reducement and with high specific melting performance. Besides the phenomena kinetics, a great attention has to be paid to the utilisation of the space for the given phenomenon and to phenomena ordering. The objective of the work is to apply the new melting principles and mathematically model the melting spaces which fulfil the present energetic and efficiency requirements.
 




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Research areas








Glass melting processes and their modelling

 

 New glass melting concepts




 


Mathematical modeling is traditional tool for the analysis of glass melting process. CFD methods  calculate velocity and temperature fiels ...

 

New relative value – space utilization – quantitatively assesses melting processes in continuous melting space.  The current industrial furnaces...





Development of new types of glasses

 

Materials for photonics and optoelectronics







The composition of the proposed glass is optimized in terms of the required properties. Colors affected by the redox state of the glass can be predicted ...

 




The industrial development is coming with a requirement of new materials. In optic and optoelectronic ...




Research of processes for vitrification of nuclear waste

 
 
 



Solving the problem of immobilizing a large amount of nuclear waste coming from the production of plutonium is the actual question ...
 
 
 



 

Experimental techniques




Preparation of glasses under defined conditions







Visual observation of glass melting processes




Solubilities of gases in melts




Diffusion coefficients of gases in melts




Image analysis




Evolved gas analysis




Oxygen partial pressure in melts




Polarized light microscopy




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UCT Prague                                                            


IRSM ASCR, v.v.i.



 
University of Chemistry and Technology Prague
Laboratory of Inorganic Materials
Technická 5
166 28 Prague 6
Czech Republic
 
Tel.  +420 22044 5192 (l. 4318, 5195)
E-mail: Jaroslav.Klouzek@vscht.cz
 
 
Institute of Rock Structure and Mechanics ASCR, v.v.i.
Laboratory of Inorganic Materials
V Holešovičkách 41
180 00 Prague 8
Czech Republic
 
Tel.  +420 266009 421 (l. 423)




Public transportation:

Metro Line "A" to Dejvicka station, exit to colleges.



Public transportation:


Metro Line "C" to Holešovice station, exit to Kobylisy, Prosek,
then by bus 102, 210 to Vychovatelna station.

Metro Line  "B" to Palmovka station, exit to Divadlo pod Palmovkou,
then by tram 10, 24, 25 to Vychovatelna station.





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Joint Workplace of The UCT Prague and The Institute of Rock Structure and Mechanics, v.v.i.
 Technická 5 
 166 28 Prague 6 – Dejvice
 IČO: 60461373 / VAT: CZ60461373
 
 Czech Post certified digital mail code: sp4j9ch
 
 Copyright: UCT Prague 2015
 
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Laboratory of Inorganic Materials is joint working place of the University of Chemistry and Technology Prague and the Institute of rock structure and mechanics ASCR, v.v.i. Laboratory activity evenly covers the area of education and both basic and applied research.

In the pedagogical field we are involved in the education of the bachelor study program Chemistry and Materials Technology, master's degree program Inorganic Non-metallic Materials and postgraduate program Chemistry and Technology of Inorganic Materials.
      
Our research activities are focused on the study of glass melting processes and materials for applications in photonics.


 
Melting space for the vitrification of radioactive materials












For students

Interesting topics of student works
Excellently equipped laboratories
Pleasant working environment


Research areas

Melting processes and their simulation
New glass melting concepts
Development of new glasses
Materials for photonics




Bubble in glass containig Na2SO4 condensate
 



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Laboratory members are involved in the education within bachelor and master study programs Chemistry and Materials. Doctoral students of the study program Chemistry and Technology of Inorganic Materials work closely with us when assisting solved research projects, completing required coursework and writing and defending a dissertation about their research project.



 





The result of the mathematical model of the flow in the melting chamber - sectional view showing the formation of spiral flow, which allows to increase the efficiency of the melting process.

Image analysis - measurement of the size of a bubble in the melt.




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Laboratory of Inorganic Materials was created from the original Laboratory for chemistry and technology of silicates and ICT Prague and ASCR founded in 1961. In 2012, the Laboratory was transformed into a Joint workplace of the University of Chemistry and Technology Prague UCT Prague) and the Institute of Rock Structure and Mechanics ASCR, v.v.i. The Laboratory cooperates with materials-oriented UCT Prague departments, especially the Department of glass and ceramics. In addition to the labs in UCT Prague (Building A, Room A04), we also work at the Institute of Rock Structure and Mechanics ASCR v.v.i., V Holešovičkách 41, 180 00 Prague 8.




Temperature distribution on the top melt level in a glass melting space 

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Postgraduate study programme: Chemistry and Technology of Materials
Field of study: Chemistry and technology of inorganic materials
Themes of the postgraduate studies





Homogenization processes in glass preparation by melting

Supervisor: Prof. Ing. Lubomír Němec, DrSc.
Supervisor specialist: Doc.Ing. Jaroslav Kloužek, CSc.
The glass preparation from crystalline raw materials involves several processes which form a homogeneous glass melt from the arising mixture of melt, undissolved particles and bubbles. The kinetics of the dissolution and separation (bubble removal) processes in the stage of melt affects substantially the energy consumption and melting performance of the glass melting spaces. The significant factors of enhancement of the dissolution processes are the natural and forced convection of the melt whereas the application of an additive force as the centrifugal force, e.g., accelerates the bubble separation from the melt. The important role of process topology in the continuous melting space is described by a new relative quantity called utilisation of the space. The space utilisation can be significantly affected by the character of the melt flow in the space. The topic applies the mathematical modelling of dissolution and separation processes in the melting spaces in order to define the optimal conditions and design of the glass melting spaces.
 









Heavy metal oxide glasses

Supervisor: Doc. Ing. Jaroslav Kloužek, CSc.
Supervisor specialist: Ing. Petr Kostka, Ph.D.
The glass network of heavy metal oxide glasses is formed by oxides such as TeO2, GeO2 or Sb2O3 instead of SiO2. These glasses stand out in comparison with conventional glasses particularly by wide interval of transparency ranging up to much longer wavelengths, lower phonon energies, higher refractive index, outstanding nonlinear properties, high solubility of rare-earth ions accompanied by high quantum yield of radiative transition etc. The work will focus on the preparation and characterization of new materials – glasses – containing antimony and/or bismuth oxides. Characterization of the prepared materials will include their basic properties such as density, molar volume, thermal stability, chemical resistance, hardness, optical transmission, refractive index, etc. Correlation between structural units forming the glass network and the resulting properties will be investigated and the influence of processing conditions during glass preparation on these properties will be evaluated.
 





Chalcogenide glasses and optical fibres

Supervisor: Doc. Ing. Jaroslav Kloužek, CSc.
Supervisor specialist: Ing. Petr Kostka, Ph.D.
Glass network of chalcogenide glasses is formed by S, Se or Te in combination with metals and/or semimetals. The presence of oxygen in these materials is usually undesirable. Real applications of this type of glass are conditioned mainly by high purity of the prepared or manufactured materials. Procedures for preparing high-purity chalcogenide glasses allowing for their use in fiber optics, already exist. The work will include the preparation of chalcogenide glasses, optimization of their composition, dotation of materials by rare earth ions and examination of the relationship between the vitreous matrix and the dopant. It is also possible to focus some of the efforts on new technological procedures for further material purification. The subsequent step will be to prepare preforms for optical fibres drawing, including the processing of structured preforms for drawing optical microstructured fibres (photonic crystal fibres) and characterization of prepared fibres.
 





Modeling of new glass melting spaces

Supervisor: Prof. Ing. Lubomír Němec, DrSc.
Supervisor specialist: Ing. Marcela Jebavá, Ph.D.
The new glass melting spaces are focused on the considerable decrease of the specific energy consumption joint with CO2 reducement and with high specific melting performance. Besides the phenomena kinetics, a great attention has to be paid to the utilisation of the space for the given phenomenon and to phenomena ordering. The objective of the work is to apply the new melting principles and mathematically model the melting spaces which fulfil the present energetic and efficiency requirements.
 




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Research areas








Glass melting processes and their modelling

 

 New glass melting concepts




 


Mathematical modeling is traditional tool for the analysis of glass melting process. CFD methods  calculate velocity and temperature fiels ...

 

New relative value – space utilization – quantitatively assesses melting processes in continuous melting space.  The current industrial furnaces...





Development of new types of glasses

 

Materials for photonics and optoelectronics







The composition of the proposed glass is optimized in terms of the required properties. Colors affected by the redox state of the glass can be predicted ...

 




The industrial development is coming with a requirement of new materials. In optic and optoelectronic ...




Research of processes for vitrification of nuclear waste

 
 
 



Solving the problem of immobilizing a large amount of nuclear waste coming from the production of plutonium is the actual question ...
 
 
 



 

Experimental techniques




Preparation of glasses under defined conditions







Visual observation of glass melting processes




Solubilities of gases in melts




Diffusion coefficients of gases in melts




Image analysis




Evolved gas analysis




Oxygen partial pressure in melts




Polarized light microscopy




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UCT Prague                                                            


IRSM ASCR, v.v.i.



 
University of Chemistry and Technology Prague
Laboratory of Inorganic Materials
Technická 5
166 28 Prague 6
Czech Republic
 
Tel.  +420 22044 5192 (l. 4318, 5195)
E-mail: Jaroslav.Klouzek@vscht.cz
 
 
Institute of Rock Structure and Mechanics ASCR, v.v.i.
Laboratory of Inorganic Materials
V Holešovičkách 41
180 00 Prague 8
Czech Republic
 
Tel.  +420 266009 421 (l. 423)




Public transportation:

Metro Line "A" to Dejvicka station, exit to colleges.



Public transportation:


Metro Line "C" to Holešovice station, exit to Kobylisy, Prosek,
then by bus 102, 210 to Vychovatelna station.

Metro Line  "B" to Palmovka station, exit to Divadlo pod Palmovkou,
then by tram 10, 24, 25 to Vychovatelna station.





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