Takao Kumaki

Title: Takao Kumaki: Innovator in Zirconia-Alumina Composite Technology

Introduction

Takao Kumaki is a notable inventor based in Kumagaya, Japan. He has made significant contributions to the field of materials science, particularly in the development of ultra-fine powders. His innovative approach has led to advancements in the preparation of zirconia-alumina base composites.

Latest Patents

Kumaki holds a patent for a hydrothermal process for preparing zirconia-alumina base ultra-fine powder. This process involves mixing an aluminum salt or alumina hydrate with an aqueous zirconium oxychloride solution, with or without a metal salt acting as a stabilizer. The mixture is then combined with urea or a substance capable of generating ammonia by hydrolysis. The reaction occurs at temperatures ranging from 140°C to 300°C and pressures between 4 to 150 kg/cm² in a high-temperature and high-pressure vessel. The resulting product is dried, calcined, and crushed to obtain an ultra-fine powder. He has 1 patent to his name.

Career Highlights

Throughout his career, Kumaki has worked with Chichibu Cement Co., Ltd., where he applied his expertise in materials science. His work has contributed to the advancement of technologies related to composite materials.

Collaborations

Kumaki has collaborated with notable colleagues such as Shigeyuki Soumiya and Masahiro Yoshimura. Their combined efforts have furthered research and development in the field of ultra-fine powders.

Conclusion

Takao Kumaki's innovative work in the preparation of zirconia-alumina base ultra-fine powders showcases his significant contributions to materials science. His patent and collaborations highlight his role as a key figure in advancing this technology.