Tohru Obata

Title: Tohru Obata: Innovator in R-T-B Based Sintered Magnets

Introduction

Tohru Obata is a notable inventor based in Yabu, Japan. He has made significant contributions to the field of materials science, particularly in the development of R-T-B based sintered magnets. With a total of 2 patents, his work has advanced the manufacturing processes of these essential components.

Latest Patents

Obata's latest patents include a method for manufacturing R-T-B based sintered magnets. This method involves preparing a coarse ground powder made from an alloy for R-T-B based sintered magnets, which has an average particle size of 10-500 μm. The process continues with obtaining a fine powder with an average particle size of 2.0-4.5 μm by using a jet mill device filled with inert gas. The final step produces a sintered body of the fine powder, ensuring that the inert gas is humidified and the oxygen content of the R-T-B based sintered magnet is maintained between 1000-3500 ppm by mass. Another patent focuses on a highly efficient manufacturing method that includes an RH supply-diffusion process. This method allows for an increased number of magnets to be processed simultaneously without them sticking to holding members.

Career Highlights

Throughout his career, Tohru Obata has worked with prominent companies such as Hitachi Metals, Ltd. and Proterial, Ltd. His experience in these organizations has contributed to his expertise in the field of magnet manufacturing.

Collaborations

Obata has collaborated with notable colleagues, including Nobuhiko Fujimori and Kazuhiro Sonoda. These partnerships have likely enriched his research and development efforts in the field of sintered magnets.

Conclusion

Tohru Obata's innovative work in R-T-B based sintered magnets has made a significant impact on the industry. His patents reflect a commitment to advancing manufacturing techniques and improving the efficiency of magnet production.