CALENDAR OF PLANNED EVENTS

August 2019

September
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CALENDAR OF PLANNED EVENTS

August 2019

September
MO
TU
WE
TH
FR
SA
SU
29
30
31
1
2
3
4
Events for August

1st

No Events
Events for August

2nd

No Events
Events for August

3rd

No Events
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4th

No Events
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11
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No Events
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APVV (Research and Development Support Agency)

Acronym: WLEDMAT

Coordinator: Dr. Robert Klement

Team: Dagmar Galusková, Ing. PhD., Jozef Kraxner, Ing. PhD., Michal Žitňan, Mgr. PhD., Ali Talimian, Dr., Branislav Hruška, Ing. PhD., Ivana Petríková, Ing PhD., Aleksandra Nowicka, Mgr., Jaroslava Michálková, Ing., Petr Chrást, Mgr., Nibu Puthenpurayil Govindan, Mgr., Fatih Kurtuldu, Mgr., Dušan Galusek, prof. Ing. DrSc., Anna Prnová, Ing. PhD., Peter Švančárek, Mgr., PhD., Monika Michálková, Ing. PhD., Jana Valúchová, Ing. PhD., Mária Chromčíková, Ing. PhD., ÚACH SAV, ÚMV SAV

Funding 2018:

Dates: 2018- 2022

Abstract: The project is focused on research and development of novel glass and glass-ceramic rare-earth aluminates-based luminescent materials for white light-emitting diodes (pc-WLED), especially materials with efficient red emission, which could improve CRI index compared to the known commercially produced phosphors. Phosphors will be prepared in the form of glass microbeads. The structure of undoped alumninate glasses in the system Al2O3-RE2O3 will be studied by spectroscopic methods. Thermal properties and kinetics of crystallization will be also studied. In order to preparer glass-ceramics materials with required properties, the conditions of crystallization process will be investigated and optimized. Photoluminescence properties of glass and glass-ceramic rare-earth and transition metal ions doped materials will be studied in detail. Special attention will be paid to study of relations between luminescent properties of materials and their structure and morphology. In final stage of the project, the composite PiG materials (Phosphor in Glass) will be prepared and characterized as thin plates suitable for direct application onto excitation LED chip. A LED diode emitting white light/warm white light will be contracted using the LED chip with suitable excitation wavelength in the NUV spectral range and prepared PiG composite with optimised thickness, so that optimal emission characteristic will be achieved.

Coordinator: Galusková Dagmar, Ing. PhD.

Team: Galusek Dušan, prof. Ing. DrSc., Chromčíková Mária, Ing. PhD, Michálková Monika, Ing. PhD., Švančárek Peter, Mgr. PhD., Prnová Anna, Ing. PhD., Valúchová Jana, Ing. PhD, Kraxner Jozef, Ing. PhD., Klement Róbert, Ing. PhD., Michalková Jaroslava, Ing., Petríková Ivana, Ing. PhD., Škvarková Natália, Ing., Aleksandra Nowicka, Mgr., Švančárková Anna, Ing., Parchovianský Milan, Ing. PhD., ÚACh SAV, ÚMV SAV

Funding 2018: 24681,-EUR

Dates: 2016 – 2020

Abstract: Extension of lifetime and enhancing the thermal stability of steel used for construction of exhaust pipes, heat exchangers in waste incinerators, and casting and melting aggregates in steel and glass production can be achieved via suitable anti-corrosion coatings. The aim of this project is development of new types of composite anti-corrosion protective layers, based on ceramics prepared by controlled pyrolysis of organosilicon precursors. The use of organosilicon precursors facilitates application of conventional coating technologies, such as spray and dip-coating, with subsequent pyrolysis and conversion of the precursor to amorphous ceramics. Increased thermal stability, corrosion resistance, and minimization of volume changes related to conversion of the organic precursor to ceramics will be achieved through the addition of suitable active and passive oxide glass fillers prepared by flame synthesis in the form of microspheres. The flame synthesis facilitates the preparation of glasses with high melting point, which ensures increase of the maximum operation temperature of the coating up to 1400 oC, as well as increased oxidation and corrosion resistance of prepared coatings, optimum compatibility of the filler with ceramic matrix and metallic substrate and, due to spherical shape of glass microparticles, also negligible influence on the rheology of the system polymer-filler in the course of coating on metallic substrate.

Coordinator: Galusek Dušan, prof. Ing. DrSc.

Team: Galusková Dagmar, Ing. PhD., Kraxner Jozef, Ing. PhD., ÚACh SAV, ÚMV SAV

Funding 2017: 11848,- EUR

Dates: 2013 – 2017

Abstract: The main purpose of the project is preparation, development and optimization of mechanical (hardness, strength, fracture toughness, wear resistance), high temperature (corrosion and thermal shock resistance) and electrical (electrical conductivity) properties of silicon carbide based ceramic composites with metallic additives, in a way that would ensure electrical metal-like conductivity without compromising structural stability. As experimental materials SiC composites with various volume fraction of Nb and Ti will be used. The subject of the study will be the relationship between the relevant properties of the experimental materials and parameters of their microstructure with the aim to understand their mutual connections, and then to use the gained knowledge in development of optimal material for applications in civil and electrical engineering.