Yuuhei Ueyama

Title: Yuuhei Ueyama: Innovator in Piezoelectric Ceramics

Introduction

Yuuhei Ueyama is a notable inventor based in Takasaki, Japan. He has made significant contributions to the field of piezoelectric ceramics, holding a total of 3 patents. His work focuses on developing lead-free piezoelectric materials that enhance performance and sustainability.

Latest Patents

Ueyama's latest patents include innovative methods for manufacturing piezoelectric ceramics and devices. One of his patents describes a piezoelectric ceramic that contains no lead as a constituent element. This ceramic features a coefficient of variation (C.V.) of grain size of 35% or less. An image quality (IQ) analysis using electron backscatter diffraction (EBSD) shows that at least one of the grains has a size between 3 μm to 5 μm, with a domain area ratio of 85% or more. Another patent focuses on a piezoelectric ceramic characterized by a perovskite compound composition formula (BiNaBa)(TiMn)O, which also maintains a C.V. in grain size of 35% or lower, resulting in improved dielectric loss tangent.

Career Highlights

Yuuhei Ueyama is currently employed at Taiyo Yuden Co., Ltd., where he continues to advance the field of piezoelectric materials. His research and innovations have positioned him as a key figure in the development of environmentally friendly ceramics.

Collaborations

Ueyama collaborates with talented coworkers, including Tomohiro Harada and Hiroyuki Shimizu. Their combined expertise contributes to the success of their projects and the advancement of piezoelectric technology.

Conclusion

Yuuhei Ueyama's work in piezoelectric ceramics exemplifies innovation in sustainable materials. His contributions are paving the way for future advancements in this important field.