The list of international projects SAS
Institute of Materials Research
Radioluminescent optical fibers for distributed sensors of harmful radiation
Radioluminiscenčné optické vlákna pre distribuované senzory škodlivého žiarenia
| Duration: |
1.1.2025 - 31.12.2026 |
| Program: |
Inter-academic agreement |
| Project leader: |
Ing. Puchý Viktor PhD. |
| Annotation: | Radiosensitive optical fibers represent a promising alternative to common scintillators for their possible application in distributed sensors of high-energy radiation. Ce3+-doped garnets represent a large group of scintillators which can be implemented into optical fibers.
We address the knowledge gap on the effect of the chemical composition of Ce-doped A3Al5O12 garnet nanoparticles, where A=Y, Ho, Er, Tm, Yb and Lu, and their radioluminescence properties. Selected compositions will be implemented into optical fibers. To prepare radioluminescent optical fibers we will use two complementary approaches: Modified chemical vapor deposition combined with nanoparticle doping and rod-in-tube drawing of sintered nanoparticle-doped glass. The processing parameters will be studied to improve the radioluminescence properties of the fibers.
The proposed fibers can improve the properties of radioluminescence sensors of high-energy and harmful radiation. Their implementation in distributed sensors can respond to public demand for improved safety of nuclear facilities and devices. |
Research and development of high-entropy ferroelectric materials for energy storage
Výskum a vývoj vysokoentropických feroelektrických materiálov pre uskladnenie elektrickej energie
| Duration: |
1.7.2024 - 30.6.2026 |
| Program: |
Bilateral - other |
| Project leader: |
RNDr. Kovaľ Vladimír DrSc. |
| Annotation: | The main goal of the proposed project is to establish and develop a scientific cooperation between Slovakia and China in the field of ferroelectric materials for energy storage applications. Joining of the research teams from both countries is motivated not only because of great technological potential of the ferroelectrics but also due to the fascinating physics behind their energy storage properties. Dielectrics play an important role in high-power energy storage applications, such as electromagnetic devices and hybrid electric vehicles, due to their fast charge-discharge capability. However, dielectric capacitors, although presenting faster charging/discharging rates and better stability compared with supercapacitors or Li-ion batteries, are limited in applications due to their relatively low energy density. To date, the best materials for dielectric capacitors are ferroelectrics based on lead-containing oxides. Toxicity of lead and environmental concerns, however, have prompted the search for lead-free alternatives. In the proposed collaborative research, we will employ the high entropy concept to develop novel lead-free ferroelectrics for effective energy storage in next generation dielectric capacitors. Recently, we have demonstrated that the energy density and efficiency of high-entropy ferroelectrics can be substantially improved by texturing their microstructure and optimizing the field-induced phase transitions. However, the origin of reversible phase transitions and enhanced energy storage performance in these modern high-entropy functional materials still needs a proper interpretation and confirmation from detailed experimental studies. Our aim is to combine research on relaxor ferroelectrics in Slovakia with activities in China focused on innovative technique of templated grain growth of electroceramics and develop lead-free highly textured ferroelectric ceramics with excellent properties for high-power energy storage applications. |
High-entropy Alloys for Sustainable and Efficient Hydrogen Technology
Vysoce entropické slitiny pro udržitelné a účinné vodíkové technologie
| Duration: |
1.7.2025 - 31.12.2030 |
| Program: |
Other |
| Project leader: |
Mgr. Oroszová Lenka PhD. |
| Annotation: | The project goal is the preparation of a high-entropy alloy suitable for hydrogen storage. The alloys will be prepared by casting very small melts and mechanical alloying. Casting will allow rapid testing of a wider range of alloy concentrations, as it is not as time-consuming and does not require complex optimization of preparation parameters as mechanical alloying. High-energy milling will also be used for the mechanical activation of the cast and subsequently, crushed materials. Continuous analyses of the mictrostructure, chemical and phase composition and analyses of sorption capabilities, including cycling adsorption and desorption tests, will also be carried out throughout the duration of the project. Artificial intelligence will be actively involved in alloy research and development. |
Developoment and processing of advanced metal hydride composites with specific microstructure properties for mobile hydrogen storage applications
Vývoj a spracovanie pokročilých metalhydridových kompozitných materiálov pre uskladnenie vodíka určených pre mobilné aplikácie
| Duration: |
1.5.2023 - 30.4.2026 |
| Program: |
ERANET |
| Project leader: |
RNDr. Nigutová Katarína PhD. |
| Annotation: | The innovation goals of this project are to provide a novel metal hydride composite offering hydrogenation capacity close to Mg alloys, faster kinetics, higher dehydrogenation capacity, and limited material degradation per cycle. The material will be based on the concept of high entropy alloy with the addition of catalysts and will be produced not only in the conventional powder form, but also as thin sheets and bulk materials. The project will improve the fundamental understanding of the mechanisms governing the hydrogenation and high-temperature behavior of HEA-based composites and also provide a functional model of a new composite material for hydrogen storage, followed by a technology for its fabrication. |
The total number of projects: 4
