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Student's work

Offered topics of students theses

If you are interested in any of the topics presented below, do not hesitate to visit us in the A210c or A207 laboratory. You can contact us also by e-mail: rubesovk@vscht.cz

Ceramic precursors of hafnium mixed oxides used in single crystal growth by 

Optical Floating Zone

Hafnium oxides have a remarkably high material density and effective proton number; both properties are important for hard radiation capture. Unfortunately, these properties also mean high melting points, which means that single crystals can be prepared only by crucible-less methods. One such method is melting in optical furnace, for which the student will be preparing ceramic preforms. This work is a collaboration with the Institute of Physics of the Czech Academy of Sciences and IKZ Berlin.

 ◳ ofz (jpg) → (ořez 215*215px)

Preparation and study of new alkali-lead halide single crystals for scintillation and laser applications 

Halogen matrices, undoped or rare-earth-doped, will be grown by micro-pulling-down and vertical Bridgeman methods. These materials are currently studied for their suitable optical properties with a broad application potential, including scintillators, lasers, light convertors etc. This work is a collaboration with the Institute of Physics of the Czech Academy of Sciences.

 ◳ Dept27_VTFig4c (png) → (ořez 215*215px) 

Thin films of optically active perovskite-like phases for the construction of magneto-optical or electro-optical composites

The aim of this work is to optimize the growth of perovskite phases doped with rare earths and to synthesize heterogeneous structures, for instance with nano-diamond.

This work is a collaboration with the research group of assoc. prof. Nekvindová.

 ◳ thin film (jpg) → (originál)

Perovskite-like oxides synthesized by Spark Plasma Sintering

Cubic materials based on perovskites doped with d- and f-elements are promising luminescence materials due to their properties. This work focuses on preparation of oxides by means of SPS. Various methods of synthesis of precursor powders will be tested: co-precipitation, sol-gel, hydrothermal growth. This work is a collaboration with the Institute of Physics of the Czech Academy of Sciences.

 ◳ SPS_LA (jpg) → (ořez 215*215px)

Single-crystal growth of scintilation materials and their characterization

This work is focused on preparation of scintillators based on multicomponent garnets doped with Ce or Pr that will eventually be grown as single crystals by micro-pulling-down (mPD). The research will aim at incorporating ions that can affect the density of the material and also the band gap width and luminescent and scintillating properties. This work is a collaboration with the Institute of Physics of the Czech Academy of Sciences.

 ◳ mPD_krystal (png) → (šířka 215px)

Synthesis of Li-based mixed oxides applicable in neutrons detection

or

Multicomponent silicate or borate structures applicable in the detection of thermal neutrons

Both works will focus on the synthesis and testing of mixed oxides of lithium or boron that can be prepared as single crystals and used for the construction of thermal neutrons detector. Alternatively, these lithium- or boron-based materials can be prepared as dense ceramics by SPS. This work is a collaboration with the Institute of Physics of the Czech Academy of Sciences.

 ◳ borates (jpg) → (šířka 215px)

Ferrite ceramics (doped with lanthanides) sintered by SPS technology

The aim of this work is the synthesis and characterization of nanopowders based on the Fe-Co-X-O system. These precursors will be then sintered by the SPS technology. This work also comprises structure and magnetic analysis.

Spark plasma sintering - Wikipedia

Get more information from the supervisor

Layered (Ln,Ca)Mn2O7 manganites for magnetic application

The aim of this work is to develop a method for stabilization of the layered phase, measurement of its magnetics properties and their modification by magnetic dopants (lanthanides or transition elements). This work is an experimental research work for the field of magnetic cooling.

Get more information from the supervisor

Sol-gel preparation of transition metal oxides as pinning centers in YBaCuO superconductors

Ongoing Student Work

  • Sesquioxides doped with lanthanides for use in scintillation technology, Tomáš Thoř (PhD student)
  • Preparation and crystal growth of scintillating materials based on alkali halides and study of new doping concepts, Kateřina Křehlíková (PhD student)
  • Rare-earth perovskite structures as a suitable matrix for scintillation use, Jan Havlíček (PhD student)
  • Oxides doped with lanthanides for magneto-optical aplications, Václav Doležal, (PhD student)
  • Luminescent materials for multi-purpose applications: How to enhance the properties, Karin Paurová, (MSc student)
  •  Hydrothermal deposition of thin layers of perovskite phases, Herbert Kindl, (MSc student)
  •  Aluminates of alkali earth metals suitable for transparent ceramics synthesis, Vojtěch Ševčík, (MSc student)
  •  Sol-gel deposition of thin layers of perovskite phases for functional composites, Stela Kašperanová, (Bc student)
  •  Cerium-doped hafnium oxides and their recrystallization by means of OFZ, Jiří Prikner, (Bc student)
  •  Preparation of dense aluminate ceramics by means of SPS, Matyáš Jandík, (Bc student)

 

Defended students' works

Doctoral theses

  • Optically active thin layers preparation by sol-gel method, 2020, Dana Mikolášová (supervisor: Kateřina Rubešová, Ph.D.)
  • Optically active ytterbium garnets for waveguide applications, 2016, Tomáš Hlásek (supervisor: Kateřina Rubešová, Ph.D.)
  • Study of properties of superconducting materials, 2012, Vilém Bartůněk (supervisor: Olga Smrčková, CSc.)
  • Properties of Bi(Pb)-Sr-Ca-Cu-O Superconductors with Anionic Substitutions, 2010, Vít Jakeš (supervisor: Dagmar Sýkorová, CSc.)

    Diploma theses

  • Preparation of multi-component garnet-based structures for the detection of high-energy radiation, 2022, Bc. Fedor Levchenko (supervisor: Kateřina Rubešová, Ph.D.)
  • Nanostructured ferrites and manganites doped with lanthanides for magnetic applications, 2021, Bc. Lukáš Blažek (supervisor: Ladislav Nádherný, Ph.D.)
  • Preparation of oxide ceramics using SPS, 2019, Bc. Jan Havlíček (supervisor: Kateřina Rubešová, Ph.D.)
  • Hexagonal aluminates doped for detection of high-energy sources, 2018, Bc. Václav Doležal (supervisor: Ladislav Nádherný, Ph.D.)
  • Preparation of thin layers Er: YbAG by spin-coating method, 2016, Bc. Vojtěch Polák (supervisor: Vít Jakeš, Ph.D.)
  • Preparation of BaTiO3 ferroelectric for use in MRI diagnostics, 2014, Bc. Petra Bačová (supervisor: Kateřina Rubešová, Ph.D.)
  • Determination of oxygen content in mixed oxides of cobalt, 2013, Bc. Nikola Bašinová (supervisor: Vít Jakeš, Ph.D.)
  • Influence of preparation conditions on microstructure and optical properties of thin films LiNbO3, 2014, Bc. Dana Mikolášová (supervisor: Kateřina Rubešová, Ph.D.)
  • Preparation of LiNbO3 by sol-gel method for PLD targets, 2012, Bc. Jakub Erben (supervisor: Vít Jakeš, Ph.D.)
  • Cobalt oxide thermoelectricity prepared from sol-gel precursors, 2011, Bc. Tomáš Hlásek (supervisor: Kateřina Rubešová, Ph.D.)
  • Thin layers of LiNbO3 prepared by sol-gel methods in non-aqueous environment, 2011, Bc. Martina Chvalová (supervisor: Kateřina Rubešová, Ph.D.)

 Bachelor theses

  • Thin films of gadollinium-doped garnet for the detection of ionizing radiation, 2023, Tomáš Chvojka (supervisor: Kateřina Rubešová, Ph.D.)
  • Scintilation response of oxides based on PbHfO3 and its substitution derivatives, 2022, Herbert Kindl (supervisor: Kateřina Rubešová, Ph.D.)
  • Hydrothermal method used at perovskite phases preparation, 2022, Karin Paurová, (supervisor: Kateřina Rubešová, Ph.D.)
  • Lu2Hf2O7 as a material for the detection of hard radiation, 2022, Vojtěch Ševčík (supervisor: Vít Jakeš, Ph.D.)
  • LiAl5O8:V mixed oxide for thermal neutrons detection, 2021, Johana Melzerová (supervisor: Vít Jakeš, Ph.D.)
  • Improvement of Ce:YAG scintillation parameters using co-doping, 2020, Fedor Levchenko (supervisor: Kateřina Rubešová, Ph.D.)
  • Nanoparticles of ZnO doped with transition metals, 2019, Lukáš Blažek (supervisor: Ladislav Nádherný, Ph.D.)
  • Optimization of the spin-coating method for deposition of oxide layers in optical quality, 2018, Tomáš Tomaško (supervisor: Ladislav Nádherný, Ph.D.)
  • Effects of oxidation state and concentration of cerium in YAG on radioluminescent properties, 2017, Jan Havlíček (supervisor: Kateřina Rubešová, Ph.D.)
  • Preparation and characterization of ErNbO4 and YbNbO4 thin films, 2013, Vojtěch Polák (supervisor: Vít Jakeš, Ph.D.)
  • Chemistry and energy production (research work), 2011, Dana Mikolášová (supervisor: Dagmar Sýkorová, CSc.)
  • History and Current State of Synthesis of Artificial Diamonds (research work), 2010, Nikola Bašinová (supervisor: Vít Jakeš, Ph.D.)
  • Effect of chelating agents on the stability of Bi-Pb-Sr-Ca-Cu gel and subsequent preparation Bi-2223, 2009, Tomáš Hlásek (supervisor: Kateřina Rubešová, Ph.D.)
  • Preparation and analytical determination of Nb(V+) solutions for the subsequent sol-gel preparation of LiNbO3, 2009, Martina Chvalová (supervisor: Kateřina Rubešová, Ph.D.)
  • High-temperature superconductors – processing for practical use (literature research work) 2009, Jakub Erben (supervisor doc. Ing. Olga Smrčková, CSc.)
  • Ca,Sr-Cu mixed oxide preparation using sol-gel methods, influence of vanadium substitution on its properties, 2007, Pavol Zvonček (supervisor Kateřina Rubešová, Ph.D.)
Updated: 15.8.2023 09:18, Author: Kateřina Rubešová

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