| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Ionescu, Emanuel
Fraunhofer Research Institution for Materials Recycling and Resource Strategies IWKS
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (28/28 displayed)
- 2024Single‐Source Precursor Synthesis of a Compositionally Complex Early Transitional Metal Carbonitride (Ti,Zr,Hf,Nb,Ta)NₓC₁₋ₓ
- 2024Micro‐/nanostructure evolution of C/SiFeO(N,C) polymer‐derived ceramic papers pyrolyzed in a reactive ammonia atmosphere
- 2024Monolithic ZrB₂‐based UHTC s using polymer‐derived Si(Zr,B)CN as sintering aidcitations
- 2024Room‐Temperature Synthesis of a Compositionally Complex Rare‐Earth Carbonate Hydroxide and its Conversion into a Bixbyite‐Type High‐Entropy Sesquioxidecitations
- 2024Exceptional Hardness and Thermal Properties of SiC/(Hf,Ta)C(N)/(B)C Ceramic Composites Derived from Single‐Source Precursor
- 2024Oxidation Resistance and Microstructural Analysis of Polymer‐Derived (HfₓTa₁₋ₓ)C/SiC Ceramic Nanocomposites
- 2024Polymer‐Derived Ceramic Coatings with Excellent Thermal Cycling Stability
- 2023Microstructural evolution of novel Si(M)(BC)N polymer-derived ceramics upon different heat treatments
- 2023Hard and tough novel high-pressure $γ-Si_3N_4/Hf_3N_4$ ceramic nanocompositescitations
- 2023Processing of polymer-derived, aerogel-filled, SiC foams for high-temperature insulationcitations
- 2022Structure and Electrical Properties of Carbon-Rich Polymer Derived Silicon Carbonitride (SiCN)citations
- 2022Structure and Electrical Properties of Carbon-Rich Polymer Derived Silicon Carbonitride (SiCN)citations
- 2022Monolithic ZrB₂‐based UHTCs using polymer‐derived Si(Zr,B)CN as sintering aidcitations
- 2022Microstructural evolution of Si(HfₓTa₁₋ₓ)(C)N polymer-derived ceramics upon high-temperature annealcitations
- 2022Oxidation resistance of ZrB₂‐based monoliths using polymer‐derived Si(Zr,B)CN as sintering aidcitations
- 2022Synthesis and temperature-dependent evolution of the phase composition in palladium-containing silicon oxycarbide ceramicscitations
- 2021Synthesis of Silver Modified Bioactive Glassy Materials with Antibacterial Properties via Facile and Low-Temperature Route
- 2020Review: Silicon oxycarbide based materials for biomedical applicationscitations
- 2019Combining soft polysilazanes with melt-shear organization of core–shell particles: On the road to polymer-templated porous ceramicscitations
- 2019Facile Preparative Access to Bioactive Silicon Oxycarbides with Tunable Porositycitations
- 2019Reactive element effect applied by alloying and SiHfBCN coating on the oxidation of pure chromiumcitations
- 2019Apatite Forming Ability and Dissolution Behavior of Boron- and Calcium-Modified Silicon Oxycarbides in Comparison to Silicate Bioactive Glasscitations
- 2017A study on the thermal conversion of scheelite-type ABO(4) into perovskite-type AB(O,N)(3)
- 2016Synthesis and high-temperature creep behavior of a SiLuOC-based glass-ceramiccitations
- 2016Synthesis and in vitro activity assessment of novel silicon oxycarbide-based bioactive glassescitations
- 2015Ceramic Nanocomposites from Tailor-Made Preceramic Polymerscitations
- 2014Polymer-derived ceramics (PDCs): Materials design towards applications at ultrahigh-temperatures and in extreme environments
- 2013Polymer-derived ceramics (PDCs): Materials design towards applications at ultrahigh-temperatures and in extreme environments
Places of action
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article
Room‐Temperature Synthesis of a Compositionally Complex Rare‐Earth Carbonate Hydroxide and its Conversion into a Bixbyite‐Type High‐Entropy Sesquioxide
Abstract
<jats:title>Abstract</jats:title><jats:p>In the present work, the solvent‐deficient synthesis of the high‐entropy rare‐earth carbonate hydroxide RE(CO<jats:sub>3</jats:sub>)(OH) (RE=La, Ce, Pr, Nd, Sm, and Gd) and its thermal conversion into bixbyite‐type sesquioxide RE<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> are reported for the first time. The high‐entropy rare earth carbonate hydroxide was prepared via mechanochemical reaction of the corresponding metal nitrate hydrates with ammonium hydrogen carbonate followed by the removal of the NH<jats:sub>4</jats:sub>NO<jats:sub>3</jats:sub> by‐product. Calcination of the carbonate hydroxide precursor in ambient atmosphere at temperatures in the range from 500 to 1000 °C led to the high‐entropy rare earth sesquioxide which exhibited a bixbyite‐type structure (<jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="graphic/ejic202300330-math-0001.png" xlink:title="urn:x-wiley:14341948:media:ejic202300330:ejic202300330-math-0001" /> ) independent of the calcination temperature. Transmission electron microscopy (TEM) investigation revealed the homogeneous distribution of all six rare earth cations in the high‐entropy sesquioxide lattice, however, with some compositional variation between individual grains. The bixbyite‐type structure may be considered as the result of heavy doping of the fluorite‐type CeO<jats:sub>2</jats:sub> lattice with the other rare earth cations, which leads to a high concentration of oxygen vacancies, as revealed by electron diffraction and Raman spectroscopy data. The solvent‐deficient synthesis method used in the present study is considered as a valuable, straightforward and easily up‐scalable method to synthesize compositionally complex oxide ceramics.</jats:p>