Chieko Fujimoto

Title: Chieko Fujimoto: Innovator in Rare-Earth Cobalt Permanent Magnets

Introduction

Chieko Fujimoto is a prominent inventor based in Shiroishi, Japan. She has made significant contributions to the field of materials science, particularly in the development of rare-earth cobalt permanent magnets. Her innovative work has led to advancements in magnetic technology, which are crucial for various applications.

Latest Patents

Chieko Fujimoto holds a patent for a rare-earth cobalt permanent magnet, along with its manufacturing method and associated devices. This patent describes a rare-earth cobalt permanent magnet that exhibits excellent magnetic characteristics. The composition includes 23 to 27 mass % of a rare-earth element R, which includes Samarium (Sm), 4.0 to 5.0 mass % of Copper (Cu), 22 to 27 mass % of Iron (Fe), 1.7 to 2.5 mass % of Zirconium (Zr), with the remainder consisting of Cobalt (Co) and unavoidable impurities. The magnet features a structure comprising a plurality of crystal grains and grain boundary parts, with a cell structure size ranging from 100 to 600 nm.

Career Highlights

Chieko Fujimoto is associated with Tokin Corporation, where she has been instrumental in advancing the company's research and development efforts in magnetic materials. Her expertise and innovative approach have positioned her as a key figure in the field.

Collaborations

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Conclusion

Chieko Fujimoto's contributions to the development of rare-earth cobalt permanent magnets highlight her role as an influential inventor in the field of materials science. Her work continues to impact various technological applications, showcasing the importance of innovation in advancing magnetic technology.