Shuichi Shiina

Title: Innovations of Shuichi Shiina in Ferrite Powder Technology.

Introduction

Shuichi Shiina is a notable inventor based in Saitama-ken, Japan. He has made significant contributions to the field of ferrite powder technology, particularly in the development of bonded magnets. With a total of 3 patents to his name, his work has had a considerable impact on the industry.

Latest Patents

One of his latest patents focuses on a ferrite powder used for bonded magnets. This ferrite powder possesses a substantially magnetoplumbite-type crystal structure and an average diameter of 0.9-2 µm. The basic composition of this ferrite powder is represented by the general formula: (A R)O.n[(Fe M)O] by atomic ratio. In this formula, A is Sr and/or Ba, R includes rare earth elements such as Y and La, and M consists of elements like Co, Mn, Ni, and Zn. The patent outlines specific conditions for the elements involved, ensuring high-quality production of the ferrite powder. The process includes mixing iron oxide with minimal amounts of (Si+Ca) and (Al+Cr), followed by calcination, pulverization, and heat treatment at temperatures between 750-950 °C for a duration of 0.5-3 hours in the air.

Career Highlights

Shuichi Shiina is currently employed at Hitachi Metals, Ltd., where he continues to innovate in the field of materials science. His work has been instrumental in advancing the technology behind bonded magnets, which are essential in various applications, including electronics and automotive industries.

Collaborations

He has collaborated with notable coworkers such as Yasunobu Ogata and Yutaka Kubota, contributing to the collective expertise and innovation within their team.

Conclusion

Shuichi Shiina's contributions to ferrite powder technology and bonded magnets highlight his role as a significant inventor in the field. His patents reflect a commitment to advancing material science, which continues to influence various industries.