Location History:
- Hirakata, JA (1976 - 1977)
- Katano, JP (1979 - 1984)
- Ikoma, JP (1993 - 1994)
- Nara, JP (1997 - 1999)
Company Filing History:
Years Active: 1976-1999
Title: **Kiyoshi Kojima: Innovations in Magnetic Materials**
Introduction
Kiyoshi Kojima, an accomplished inventor based in Nara, Japan, has made significant contributions to the field of advanced materials. With a portfolio of 13 patents, his work primarily focuses on rare-earth-iron-nitrogen based magnetic materials, which are crucial for various industrial applications.
Latest Patents
Kiyoshi Kojima is renowned for his latest patents, which include an innovative approach to producing rare-earth-iron-nitrogen based magnetic materials. His patented method enhances magnetic properties and effectively addresses the decline during pulverizing processes. The methodology precisely controls the particle dimensions necessary for achieving single-domain behavior, utilizing a combination of elements such as Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, and W in specific atomic percentages. The production is optimized through a gas current type jet mill, which ensures efficient pulverization and minimizes fragility.
Another significant patent involves the method for producing alloy powder of the R2T17 system. This process includes a homogenizing heat-treatment that transforms an ingot with rare earth elements into an alloy, enhancing its durability and usability in magnetic applications. By employing hydrogen absorption in controlled conditions, the method facilitates effective coarse crushing treatment.
Career Highlights
Kiyoshi Kojima works at Matsushita Electric Industrial Co., Ltd., where he has played a pivotal role in developing cutting-edge magnetic materials. His contributions not only advance technological innovation but also strengthen industrial capabilities in material sciences.
Collaborations
Throughout his career, Kiyoshi Kojima has collaborated with esteemed colleagues such as Shigeru Kojima and Takao Kubo. Their collective expertise and teamwork have led to breakthrough innovations in magnetic materials and production methods, highlighting the significance of collaboration in the field of research and development.
Conclusion
Kiyoshi Kojima stands out as a prominent inventor whose work in rare-earth-iron-nitrogen based magnetic materials continues to influence industrial practices. His patents reflect a commitment to innovation and excellence in material science, positioning him as a key figure in advancing technology in this domain.