Shigeru Kojima

Title: Shigeru Kojima: Innovator in Permanent Magnet Technology

Introduction

Shigeru Kojima is a prominent inventor based in Kyoto, Japan. He has made significant contributions to the field of materials science, particularly in the development of permanent magnets. With a total of 6 patents to his name, Kojima's work has had a lasting impact on the industry.

Latest Patents

Kojima's latest patents include a method of making a permanent magnet from a manganese-aluminum-carbon (Mn-Al-C) alloy. This innovative method involves preparing a polycrystalline Mn-Al-C alloy magnet with a specified direction of easy magnetization. The process includes subjecting the magnet to compressive working at temperatures ranging from 550°C to 780°C, ensuring that the degree of compressive working is equivalent to a logarithmic strain of ≤ -0.1. Additionally, he has developed a permanent magnetic Mn-Al-C alloy that incorporates copper in amounts ranging from 0.5 to 6.2 wt%. This alloy comprises 68.0 to 73.0 wt% of manganese, a specific range of carbon, and aluminum, which is subjected to warm plastic deformation to enhance its plasticity.

Career Highlights

Kojima has been associated with Matsushita Electric Industrial Co., Ltd., where he has played a crucial role in advancing magnet technology. His expertise in alloy development has positioned him as a key figure in the field.

Collaborations

Kojima has collaborated with notable coworkers, including Kiyoshi Kojima and Yoichi Sakamoto. Their combined efforts have contributed to the success of various projects within the company.

Conclusion

Shigeru Kojima's innovative work in the field of permanent magnets has established him as a leading inventor in materials science. His contributions continue to influence the industry and pave the way for future advancements.