Publications by authors named "Xuefei Miao"
Multiple Magnetic Phase Transitions and Giant Refrigerant Capacity in a GdDyHoErTm High-Entropy Alloy.
ACS Appl Mater Interfaces
December 2024
Magnetocaloric high-entropy alloys (HEAs) have recently garnered significant interest owing to their potential applications in magnetic refrigeration, offering a wide working temperature range and large refrigerant capacity. In this study, we thoroughly investigated the structural, magnetic, and magnetocaloric properties of equiatomic GdDyHoErTm HEAs. The as-cast alloy exhibits a single hexagonal phase, a randomly distributed grain orientation, and complex magnetism.
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- Engineering electronic band structures through doping is essential for enhancing thermoelectric performance in materials.
- The study reveals that the Sn-s states in SnTe significantly impact the density of states at the valence band's top, influencing band structure tuning.
- A design approach is presented, identifying Al as an effective dopant that, combined with Sb and AgBiTe, leads to a record high average ZT of 1.15 across a temperature range of 300 to 873 K.
A brief review of microstructure design in transition metal-based magnetocaloric materials.
J Phys Condens Matter
September 2024
Magnetic cooling, a solid-state refrigeration technology based on the magnetocaloric effect, has attracted significant attention in space cooling due to its high energy-efficiency and environmental friendliness. Transition metal-based magnetocaloric materials (MCMs) with the merit of low-cost have emerged as promising candidates for efficient magnetic refrigeration applications. This review explores the intricate relationship between microstructure and multiple properties (e.
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- SnSe single crystals are popular for their great thermoelectric performance, but polycrystalline versions are more desirable for easier processing and scalability.
- This study reports impressive thermoelectric figures: a high average thermoelectric figure of merit (ZT) of 0.88 and a peak ZT of 1.92 in solution-processed SnSe nanoplates, thanks to effective heat scattering mechanisms.
- The incorporation of germanium (Ge) and indium (In) enhances the electronic structure and increases the Seebeck coefficient, improving both electrical conductivity and overall power factor, making Ge- and In-codoped SnSe nanoplates promising for thermoelectric generators.
Fundamental research into the Li-O2 battery system has gone into high gear, gaining momentum because of its very high theoretical specific energy. Much progress has been made toward understanding the discharge mechanism, but the mechanism of the oxygen evolution reaction (OER) on charge (i.e.
View Article and Find Full Text PDFThe present study investigated the effectiveness of electromagnetic fields in preventing calcium carbonate (CaCO₃) fouling in cooling water. Four different frequencies and two different voltages were adopted to induce electromagnetic fields directly in water with constant water temperature and constant flow velocity. Artificial hard water was used.
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