https://phys.org/news/2025-02-ceramic-powders-archimedean-resist-extreme.html Phys.org Topics * Week's top * Latest news * Unread news * Subscribe [ ] Science X Account [ ] [ ] [*] Remember me Sign In Click here to sign in with or Forget Password? Not a member? Sign up Learn more * Nanotechnology * Physics * Earth * Astronomy & Space * Chemistry * Biology * Other Sciences * Medical Xpress Medicine * Tech Xplore Technology [INS::INS] * * share this! * Share * Tweet * Share * Email 1. Home 2. Chemistry 3. Materials Science * * * --------------------------------------------------------------------- February 28, 2025 The GIST Editors' notes This article has been reviewed according to Science X's editorial process and policies. Editors have highlighted the following attributes while ensuring the content's credibility: fact-checked trusted source proofread Ceramic powders with Archimedean shapes resist extreme heat and oxidation by Zhang Nannan, Chinese Academy of Sciences Researchers create high-performance ceramic powders with enhanced heat resistance Boride ceramic particle growth process schematic. Credit: WANG Zhen A research team led by Prof. Hu Xiaoye from the Hefei Institutes of Physical Science of the Chinese Academy of Sciences has synthesized high-quality boride ceramic powders with an Archimedean shape. These findings, published in the Journal of the European Ceramic Society, hold promising implications for the future of heat protection materials. Boride ceramics are renowned for their high melting points, excellent oxidation resistance, and outstanding corrosion resistance, making them ideal candidates for heat-resistant materials. However, the synthesis of high-performance boride ceramic composites has remained a significant challenge, particularly in producing high-purity powders. In this study, the researchers refined a precursor-carbon/boron thermal reduction process to successfully produce high-purity ZrB[2] and HfB[2] powders, known for their superior properties. By introducing a novel sol-gel-assisted carbon-boron reduction method, they achieved molecular-level mixing at low temperatures, resulting in high-purity ceramic powders. By adding dispersing agents like polyethylene glycol (PEG) and oleic acid, they managed to reduce the particle size and prevent aggregation, offering precise control over the ceramic powder's dimensions. They then created boride powders with Archimedean polyhedral shapes--complex, highly symmetrical geometries that enhance the mechanical and electrical properties of the ceramics. These new powders have exceptional crystallinity, reducing defects and improving the material's overall performance. The high crystallinity of the polyhedral morphology also prevents weakening at grain boundaries, reducing the risk of oxidation and improving the material's longevity in high-temperature environments. These Archimedean polyhedral-shaped ceramic powders not only improved the material's oxidation resistance but also formed a protective MO [2] layer on the surface when subjected to extreme heat. When exposed to 1,400degC for three hours, the ceramic oxidation layer formed on the surface measured just 86.43 micrometers in thickness, a significant improvement over similar materials reported in previous studies. This breakthrough in ceramic powder synthesis not only offers a new approach to producing advanced materials but also opens up new avenues for developing ultra-high-temperature materials capable of withstanding extreme conditions. More information: Zhen Wang et al, Growth mechanism and sintering properties of high crystallinity Archimedean polyhedral (Zr0.5Hf0.5) B2 nanoparticles, Journal of the European Ceramic Society (2025). DOI: 10.1016/j.jeurceramsoc.2025.117251 Provided by Chinese Academy of Sciences Citation: Ceramic powders with Archimedean shapes resist extreme heat and oxidation (2025, February 28) retrieved 10 March 2025 from https: //phys.org/news/ 2025-02-ceramic-powders-archimedean-resist-extreme.html This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. 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A refined precursor-carbon/boron thermal reduction process and a novel sol-gel-assisted method enabled the production of high-purity ZrB[2] and HfB[2] powders. These powders exhibit enhanced mechanical and electrical properties, forming a protective MO[2] layer at high temperatures, significantly improving performance and longevity. This summary was automatically generated using LLM. Full disclaimer Let us know if there is a problem with our content Use this form if you have come across a typo, inaccuracy or would like to send an edit request for the content on this page. For general inquiries, please use our contact form. For general feedback, use the public comments section below (please adhere to guidelines). 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