| 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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Bernauer, Jan
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2024Single‐Source Precursor Synthesis of a Compositionally Complex Early Transitional Metal Carbonitride (Ti,Zr,Hf,Nb,Ta)NₓC₁₋ₓ
- 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
- 2024Microstructure Characterization and Mechanical Properties of Polymer‐Derived (HfₓTa₁₋ₓ)C/SiC Ceramic Prepared upon Field‐Assisted Sintering Technique/Spark Plasma Sintering
- 2024Thermal Conductivity Analysis of Polymer‐Derived Nanocomposite via Image‐Based Structure Reconstruction, Computational Homogenization, and Machine Learning
- 2024Microstructure Characterization and Mechanical Properties of Polymer‐Derived (Hf<sub><i>x</i></sub>Ta<sub>1−<i>x</i></sub>)C/SiC Ceramic Prepared upon Field‐Assisted Sintering Technique/Spark Plasma Sinteringcitations
- 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
- 2022Microstructural evolution of Si(HfₓTa₁₋ₓ)(C)N polymer-derived ceramics upon high-temperature annealcitations
- 2022Single-source-precursor derived bulk Si3N4HfBxN(1-x) ceramic nanocomposites with excellent oxidation resistancecitations
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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>