The technology is considered the developed the world’s first continuous manufacturing technology for millimetre wave-absorbing magnetic materials.
The material in question is epsilon iron oxide, known for its ability to absorb millimetre waves with a coercive force equivalent to that of neodymium (Nd) magnets. Epsilon iron oxide is also almost the only magnetic material that absorbs ultra-high frequencies (30 to 200GHz), which is a potential 6G frequency band.
Until recently, this material could only be formed in particles of under 50 nanometres. A team in Japan did manage to produce pure epsilon iron oxide, but their technique is not considered practical, as it involves a time-consuming multi-stage process.
In contrast, the researchers at KIMS have been able to continuously manufacture epsilon iron oxide through a process that would facilitate the commercialisation of the material.
“The significance of the study is that it developed the first continuous...