Shigeo Iiri

Title: Shigeo Iiri: Innovator in High-Purity Metal Powders

Introduction

Shigeo Iiri is a notable inventor based in Yokohama, Japan. He has made significant contributions to the field of materials science, particularly in the production of high-purity metal powders. With a total of 2 patents, his work has implications for various advanced technologies.

Latest Patents

Iiri's latest patents include methods for preparing high-purity molybdenum or tungsten powder. This process involves decomposing a powder or an oxide powder of molybdenum or tungsten with hydrogen peroxide water, followed by contacting the resulting aqueous solution with a cation exchange resin. The concentrated solid material can then be reduced to obtain high-purity molybdenum or tungsten powders, which are essential for VLSI elements. Additionally, he has developed a method for producing barium-ferrite series powder from an alkaline aqueous solution. This method involves heating the solution to precipitate a precursor, which is then baked to crystallize the powder.

Career Highlights

Throughout his career, Shigeo Iiri has worked with prominent companies such as Tokyo Shibaura Denki and Toshiba Corporation. His experience in these organizations has allowed him to refine his expertise in materials science and patent development.

Collaborations

Iiri has collaborated with notable colleagues, including Masaru Hayashi and Hiroshi Endo. Their joint efforts have contributed to advancements in the field of high-purity metal powders.

Conclusion

Shigeo Iiri's innovative work in the production of high-purity metal powders has established him as a key figure in materials science. His patents reflect a commitment to advancing technology and improving manufacturing processes.