Hirohisa Yamamoto

Title: Hirohisa Yamamoto: Innovator in Glass-Ceramic Technology

Introduction

Hirohisa Yamamoto is a notable inventor based in Osaka, Japan. He has made significant contributions to the field of materials science, particularly in the development of glass-ceramic technologies. His innovative approach has led to advancements that benefit various applications, including dental materials.

Latest Patents

Yamamoto holds a patent for a "Method for preparing glass-ceramic." This invention provides a method for preparing a glass-ceramic containing leucite crystals. The process involves mixing a glassy material with specific compositions of SiO, Al2O3, K2O, and Na2O, along with synthetic leucite seed crystals. The mixture is then heat-treated at temperatures ranging from 750 to 950 degrees Celsius for a duration of 1 to 5 hours. The resulting glass-ceramic is characterized by its substantial freedom from opacification and a stable coefficient of thermal expansion during fusion-bonding to a metal frame.

Career Highlights

Yamamoto is associated with Yamamoto Precious Metal Co., Ltd., where he continues to innovate in the field of glass-ceramics. His work has been instrumental in enhancing the properties of dental porcelain powders and metal-ceramic restorations.

Collaborations

Yamamoto has collaborated with notable colleagues, including Takeshi Hoshikawa and Masatoshi Yamazoe. Their combined expertise has contributed to the advancement of glass-ceramic technologies.

Conclusion

Hirohisa Yamamoto's contributions to glass-ceramic technology exemplify the impact of innovative thinking in materials science. His patent and ongoing work continue to influence the field positively.