In a groundbreaking study published in ‘Materials Today Advances’, researchers have unveiled the potential of high-entropy alloys (HEAs) as advanced magnetic shielding materials, specifically for low-frequency wireless power transmission applications. Led by Cheng-Hsien Yeh from the Department of Electrical Engineering at National Cheng Kung University in Tainan, Taiwan, this research highlights a significant leap in soft magnetic materials, which are essential for enhancing the efficiency of electromagnetic shielding.
Traditionally, soft magnetic materials like the iron-based FeMnZn alloys have been widely used in various applications, but they come with limitations such as low saturation magnetization and poor thermal stability. Yeh’s team has turned the spotlight on HEAs, which have recently gained attention for their remarkable magnetic properties. “Our findings demonstrate that the FeCoNiSiCuNb HEA, when subjected to specific ball-milling and annealing processes, can achieve a saturation magnetization that surpasses conventional materials,” Yeh explained. This innovative alloy retains over 50% of its magnetic properties even at elevated temperatures of 700K, a feature that could revolutionize the design of electronic devices and systems.
The research highlights a substantial increase in real permeability, with the FeCoNiSiCuNb HEA showing a 2.25-fold improvement over traditional materials at an operating frequency of 100 kHz. This enhancement translates into practical benefits, such as higher inductance and an impressive coupling coefficient of 0.84, leading to a 19% increase in transmission efficiency. Such advancements are crucial for the construction sector, particularly in the realm of wireless charging technologies for electric vehicles and smart infrastructure.
As the construction industry increasingly integrates smart technologies, the implications of these findings are far-reaching. The ability to utilize HEAs in magnetic shielding could pave the way for more efficient and reliable wireless power systems, which are essential for the growing number of electric vehicles and smart devices that rely on seamless energy transfer. “This research not only provides a new material option but also opens avenues for the development of next-generation wireless power systems that are both efficient and robust,” added Yeh.
The potential applications of HEAs extend beyond just wireless charging; they could also play a critical role in improving the electromagnetic compatibility of various construction technologies, making buildings smarter and more energy-efficient. As the industry moves toward more sustainable and technologically advanced solutions, the insights from this study could serve as a catalyst for innovation.
For those interested in the technical details and implications of this research, more information can be found at National Cheng Kung University, where Cheng-Hsien Yeh and his team continue to explore the frontiers of materials science. This research not only marks a significant advancement in the field of soft magnetic materials but also sets the stage for exciting developments in construction and technology.