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| DESICAEX – Vývoj karbidu kremičitého pre extrémne aplikácie | |
| Development of silicon carbide for extreme application | |
| Program: | SRDA |
| Project leader: | Ing. Hanzel Ondrej, PhD. |
| Annotation: | The proposed project is oriented towards development of fully dense silicon carbide ceramics without traditional oxide sintering additives or with addition of trace amount of metals (Al, Fe) at sintering temperature lower than temperature (T < 2100°C) required for preparation of solid-state sintered SiC. Project will be focused on comprehensive understanding of sintering mechanisms and study how modification of silicon carbide powders and/or addition of very small amount of metals (Al, Fe) can possibly influence and lower sintering temperature for preparation of fully dense silicon carbide. Due to the increasing interests and demands in energy applications, atmospheric re-entry vehicles, propulsion-system components, aerospace applications, parts of rocket engines, etc. is inevitable also characterize high-temperature properties (thermal conductivity, high-temperature strength, oxyacetylene torch resistance) of prepared silicon carbide ceramics. So, thermal conductivity up to 1500°C, high-temperature strength in temperature range 1500 – 2000°C and oxyacetylene torch resistance at temperature higher than 1700°C will be investigated and effect of powder modification, sintering parameters and microstructure on high-temperature properties will be studied and evaluated |
| Duration: | 1.9.2025 – 31.8.2029 |
| Keramické kompozitné materiály na báze SiC s vysokou tepelnou vodivosťou | |
| Silicon carbide ceramic composite materials with high thermal conductivity | |
| Program: | VEGA |
| Project leader: | Ing. Hanzel Ondrej, PhD. |
| Annotation: | The main goal of this project is preparation of dense silicon carbide (SiC) ceramics without sintering additives and/or silicon carbide composites with very low content (up to 1 wt. %) of sintering additives (oxides of rare-earth elements), with high thermal conductivity. The research will be focus on study of the effect of a-SiC and ß-SiC phase content on thermal conductivity of silicon carbide without sintering additives and the second research direction will be focus on study of the effect of amount and type of additives (oxides of rare-earth elements) on the thermal conductivity of SiC composites. In order to achieve project objectives, research focused on preparation of dense silicon carbide or SiC composite at relatively low sintering temperature (up to 2000°C) will be necessary. This process comprises study of SiC powders or SiC composite powders modification by freeze granulator, thermal annealing of granulated powders and followed by granules sintering with field assisted sintering technology (FAST). |
| Duration: | 1.1.2025 – 31.12.2028 |
| Pórovité anódy na báze SiOC pre sodíkové batérie novej generácie | |
| SiOC-based anodes for the new generation sodium-ion batteries | |
| Program: | VEGA |
| Project leader: | doc. Ing. Lenčéš Zoltán, PhD. |
| Duration: | 1.1.2025 – 31.12.2028 |
| SASIBA – Keramické anódy na báze SiOC pre udržatelné sodíkovo iónové a kovové batérie | |
| SiOC-based ceramic anodes for sustainable sodium ion and metal batteries | |
| Program: | Plán obnovy EÚ |
| Project leader: | doc. Ing. Lenčéš Zoltán, PhD. |
| Duration: | 1.1.2025 – 30.6.2026 |