Norihira Takai

Title: Norihira Takai: Innovator in Silicon Nitride Technology

Introduction

Norihira Takai is a prominent inventor based in Yamato, Japan, known for his significant contributions to the field of materials science, particularly in silicon nitride technology. With a total of two patents to his name, Takai has developed innovative methods that enhance the manufacturing processes of advanced ceramic materials.

Latest Patents

Takai's latest patents include a method for manufacturing a beta'-Sialon sintered body. This invention outlines a process that involves preparing a starting material by adding 10 to 1,000 wt. parts of metal silicon powder to 100 wt. parts of a mixed powder composed of 20 to 80 wt. % silica powder and 80 to 20 wt. % aluminum powder. The method further includes the addition of a refractory fine powder, if required, and involves molding the mixture into a green compact before sintering it in a nitrogenous non-oxidative gas atmosphere at temperatures ranging from 1,200°C to 1,550°C. The result is a compact sintered body that showcases improved properties.

Another notable patent by Takai is a process for preparing silicon nitride powder with a high alpha-phase content. This process consists of providing a blended powder material made of silica powder and amorphous carbon powder, followed by nitriding and burning the blended material at temperatures between 1,300°C and 1,700°C while feeding a nitrogen-containing, non-oxidizing gas. The resulting product is suitable for manufacturing high-density and high-strength sintered articles of silicon nitride.

Career Highlights

Norihira Takai is associated with Toshiba Ceramics Co., Ltd., where he has been instrumental in advancing the company's research and development efforts in ceramic materials. His work has significantly contributed to the field, enhancing the performance and applications of silicon nitride and related materials.

Collaborations

Takai has collaborated with notable colleagues, including Masaaki Mori and Tamotu Ogawa, who have contributed to his research endeavors and innovations in the field of materials science.

Conclusion

Norihira Takai's innovative work in silicon nitride technology has led to advancements that benefit various industrial applications. His patents reflect a commitment to enhancing material properties and manufacturing processes, solidifying his reputation as a leading inventor in his field.