Development of metastable-phase advanced material synthesis technology
As with the widespread interest in graphite and diamond, there is growing interest in metastable phases that have different physical properties than the standard phases. However, the processes for creating metastable-phase products are very limited. New discoveries have been published in the latest issue of Natural About the development of a new metastable-phase synthesis system that could drastically improve the physical properties of various materials.
Dr. in the Clean Energy Research Division of the Korea Institute of Science and Technology (KIST; Chairman: Yoon, Seok Jin). Chun, a research team led by Dong Won, has announced the successful development of a new advanced metastable-phase palladium hydride (PdHx). ) Subject. Moreover, they identified its development mechanism.
A metastable-phase material has a higher thermodynamic energy than a stationary phase, but requires considerable energy to achieve a constant phase, unlike other materials, which are at a constant phase with low thermodynamic energy. The research team integrated a metal hydride directly by developing a substance that can store hydrogen under a suitable hydrogen atmosphere, without scattering hydrogen into a metal. Significantly, they successfully developed metastable-phase metal hydride with a new crystal structure. Furthermore, they confirmed that the developed metastable-phase material has good thermal stability and twice the hydrogen storage capacity of the static-phase material.
To clarify the theoretical basis and scientific evidence for these findings, the study team used atomic electron tomography, which reconstructs 3D images from 2D electron microscopy to nanometer-sized crystals in a metal hydrate. As a result, they demonstrated that the metastable phase is thermodynamically stable, identified the 3D structure of metastable-phase crystals, and proposed a new nanoparticle development mechanism called “multi-phase crystallization”. While most research focuses on creating stable-phase materials, this study is significant as it reveals a new paradigm in metastable-base-based material development.
Dr. Chun said, “These research findings provide an important process for the acquisition of raw technology in the development of advanced alloy materials with light atoms. Like the Czochralski (CZ) method used to produce the main material, single-crystal silicon, it will be a source technology.
<div class="article-main__explore my-4 d-print-none"> The new hydrogen storage material reads on the gas </div> <hr class="mb-4"/> <div class="article-main__more p-4"> <strong>More info:</strong> Palladium hydride, packed close to the metastable hexagon in liquid cell TEM, by Jeong Hong et al. <i>Natural</i> (2022) <a data-doi="1" href="https://dx.doi.org/10.1038/s41586-021-04391-5" target="_blank" rel="noopener">DOI: 10.1038 / s41586-021-04391-5</a> </div> <p> Presented by the National Science and Technology Research Council <!-- print only --> <div class="d-none d-print-block"> <strong>Quote</strong>: Advances in Metastable-Face Advanced Package Technology (2022, April 15) 15 April 2022 Retrieved from https://phys.org/news/2022-04-metastable-phase-advanced-material-synthesis-technology.html This document is subject to copyright. No part may be reproduced without written permission, except for any reasonable manipulation for the purpose of personal study or research. Content is provided for informational purposes only. </div> </div>https://connect.facebook.net/en_US/sdk.js</p>