Company Filing History:
Years Active: 1998-1999
Title: Kohichi Hayashi: Innovator in Piezoelectric Ceramics
Introduction
Kohichi Hayashi is a notable inventor based in Shiga-ken, Japan. He has made significant contributions to the field of piezoelectric ceramics, holding a total of 2 patents. His work focuses on enhancing the properties of piezoelectric materials, which are essential in various electronic applications.
Latest Patents
Hayashi's latest patents include innovative developments in piezoelectric ceramics. One patent describes a piezoelectric ceramic that possesses a low mechanical quality coefficient Qm and excellent heat resistance. This ceramic is particularly suitable for filter elements that can be applied to surface mounting. The composition includes a composite oxide of lead, zirconium, and titanium, along with oxides of manganese, silicon, and boron. Notably, the concentration of manganese oxide in the crystal grain boundary is higher than that in the crystal grains of the ceramic.
Another patent focuses on a piezoelectric ceramic that maintains high piezoelectric properties within a composition featuring a morphotropic phase boundary (MPB) structure. This ceramic has a solid solution expressed by the general formula xPbTiO.sub.3 --(1-x) PbZrO.sub.3 as its main component. The presence of a ceramic with a spinel type structure, maintained at about 5 volume % or less, enhances the material's stability in resonant frequency.
Career Highlights
Kohichi Hayashi is currently employed at Murata Manufacturing Co., Ltd., a leading company in the electronics industry. His work at Murata has allowed him to focus on the development of advanced materials that are crucial for modern electronic devices. His innovative approach and dedication to research have positioned him as a key figure in the field of piezoelectric ceramics.
Collaborations
Hayashi has collaborated with notable coworkers, including Kenichi Nada and Kosuke Shiratsuyu. Their combined expertise has contributed to the advancement of piezoelectric technology and the successful development of new materials.
Conclusion
Kohichi Hayashi's contributions to the field of piezoelectric ceramics demonstrate his commitment to innovation and excellence. His patents reflect a deep understanding of material science and its applications in electronics. Through his work at Murata Manufacturing Co., Ltd., he continues to influence the future of piezoelectric technology.