Kazumitsu Hishinuma

Title: Kazumitsu Hishinuma: Innovator in Zirconia-Alumina Composite Technology

Introduction

Kazumitsu Hishinuma 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

Hishinuma 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 stabilizing metal salt. The mixture is then combined with urea or a substance that generates ammonia through 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 yield an ultra-fine powder. He has 1 patent to his name.

Career Highlights

Throughout his career, Hishinuma has worked with Chichibu Cement Co., Ltd., where he applied his expertise in materials science. His work has contributed to the advancement of composite materials, enhancing their applications in various industries.

Collaborations

Hishinuma has collaborated with notable colleagues such as Shigeyuki Soumiya and Masahiro Yoshimura. These partnerships have fostered innovation and development in the field of materials science.

Conclusion

Kazumitsu Hishinuma's contributions to the field of zirconia-alumina composites demonstrate his innovative spirit and dedication to advancing materials technology. His patent and collaborations highlight the importance of teamwork in achieving significant scientific breakthroughs.