Company Filing History:
Years Active: 1987-1997
Title: Tetsu Narutani: Innovator in Mn-Zn Ferrite Technology
Introduction
Tetsu Narutani is a prominent inventor based in Chiba, Japan. He has made significant contributions to the field of materials science, particularly in the development of Mn-Zn ferrites. With a total of 6 patents to his name, Narutani's work has had a substantial impact on the efficiency and effectiveness of magnetic materials used in various applications.
Latest Patents
One of Narutani's latest patents is a method for producing Mn-Zn ferrites. This innovative method involves a three-step sintering process that efficiently produces Mn-Zn ferrites with excellent magnetic properties. The first step raises the temperature from room temperature to 600°C over a period of 30 minutes to 5 hours. The second step involves increasing the temperature to the sintering temperature and maintaining it until cooling begins, all within a period shorter than 10 hours. Finally, the cooling step lowers the temperature to 150°C over a period longer than 3 hours, with the total duration of the three steps being less than 20 hours. This method allows for the rapid production of high-quality Mn-Zn ferrites.
Another notable patent by Narutani is for a low power loss Mn-Zn ferrite. This ferrite is composed primarily of Fe₂O₃, MnO, and ZnO in specific mole ratios, along with trace amounts of SiO₂, CaO, niobium oxide, and titanium oxide or antimony oxide. This innovative ferrite is particularly suitable for use as a transformer material in switched mode power supplies, showcasing Narutani's commitment to advancing technology in the field.
Career Highlights
Tetsu Narutani is associated with Kawasaki Steel Corporation, where he has been instrumental in driving research and development efforts in magnetic materials. His work has not only contributed to the company's success but has also positioned him as a leading figure in the industry.
Collaborations
Throughout his career, Narutani has collaborated with notable colleagues, including Masakatsu Yamazaki and Shigeharu Suzuki. These collaborations have fostered innovation and have led to advancements in the field of materials science.
Conclusion
Tetsu Narutani's contributions to the development of Mn-Zn ferrites have established
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