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: Researchers at University of Tsukuba have discovered that the crystal structure of zirconia nanoparticles remains stable under uniform pressure applied from all directions but changes under anisotropic pressure. This unique property is expected to lead to new technologies for detecting and evaluating pressure anisotropy, which has been difficult to assess using conventional methods.
Zirconia is a ceramic material with high mechanical strength, heat resistance and wear resistance. It is widely used in applications ranging from industrial products to medical and dental materials. Zirconia can adopt several crystal structures, of which the monoclinic phase is stable at room temperature under normal conditions.
When zirconia particles are reduced to the nanometer scale, however, the tetragonal phase that normally forms only at high temperatures can be retained even at room temperature. In a new study published in the European Journal of Inorganic Chemistry, the research team focused on tetragonal zirconia nanoparticles and investigated how their crystal structure changes depending on how pressure is applied. Under hydrostatic pressure, which is applied uniformly from all directions, the tetragonal phase remained largely unchanged.
In contrast, when anisotropic pressure was applied, the tetragonal phase transformed into the monoclinic phase, and this transformation occurred more readily as pressure anisotropy increased. These properties suggest that such structural changes could be used to detect and evaluate pressure anisotropy, which has been difficult to assess using conventional methods. The approach is expected to find applications across the many fields that use high-pressure technologies, including food processing, medicine and materials research.
Yuki Konno et al, Hydrostatic and Anisotropic Pressure Responses in Tetragonal Zirconia Nanoparticles, European Journal of Inorganic Chemistry (2026). DOI: 10.1002/ejic.70302 Journal information: European Journal of Inorganic Chemistry BA art history, MA material culture. Former museum editor, paramedic, and transplant coordinator.
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