Noriaki Yamada

Title: Noriaki Yamada: Innovator in Ferrite Technology

Introduction

Noriaki Yamada is a notable inventor based in Ube, Japan. He has made significant contributions to the field of materials science, particularly in the development of ferrite particles used in magnetic recording media. His innovative approach has led to advancements that enhance the performance of these materials.

Latest Patents

Yamada holds a patent for a method titled "Wet process of preparing fine particles of ferrite of magnetoplumbite." This patent describes a hydrothermal treatment process for creating fine and plate-shaped ferrite particles. The process involves using a powder of gamma-Fe2O3 or (FeO)x.Fe2O3, along with compounds of Ba, Sr, or Pb in an aqueous alkali solution. The introduction of Sn4+ or M2+ ions, such as Fe2+, Cu2+, or Zn2+, into the reaction system allows for the partial substitution of Fe3+ in the ferrite. This substitution effectively lowers the coercive force of the ferrite powder, making it suitable for use in perpendicularly magnetizing recording media. The process also enables the reduction of particle size to approximately 0.2 μm.

Career Highlights

Noriaki Yamada is currently associated with Central Glass Company, Limited, where he continues to innovate in the field of ferrite technology. His work has been instrumental in advancing the capabilities of magnetic materials, which are crucial for modern recording technologies.

Collaborations

Yamada has collaborated with notable colleagues, including Satoshi Nishimura and Hiromi Kawamoto. These partnerships have fostered a collaborative environment that enhances research and development efforts in their field.

Conclusion

Noriaki Yamada's contributions to ferrite technology exemplify the impact of innovative thinking in materials science. His patented methods and ongoing work at Central Glass Company, Limited, continue to influence the development of advanced magnetic materials.