Kazuhiko Tomomatu

Title: Kazuhiko Tomomatu: Innovator in Barium Titanate Single Crystals

Introduction

Kazuhiko Tomomatu is a notable inventor based in Tokyo, Japan. He has made significant contributions to the field of materials science, particularly in the preparation of barium titanate single crystals. His innovative approach has led to advancements in various applications, including electronics and optics.

Latest Patents

Kazuhiko Tomomatu holds a patent for a process for preparing barium titanate single crystals. This patent describes a method involving a mixture of titanium dioxide and an oxide or carbonate of barium, which includes one or more transition metal elements selected from the group of V, Cr, Mn, Fe, Co, Ni, and Cu, in the amount of 2 ppm or more. The mixture is heated to a predetermined temperature to create a melt. A seed crystal of BaTiO.sub.3 is then brought into contact with the melt under an environment with a low oxygen partial pressure of 0.02 atm or less. The melt is slowly cooled to grow a single crystal on the seed crystal. The resulting single crystal is subsequently heated at a temperature of 600 °C or more, under an oxidizing environment with an oxygen partial pressure greater than 0.1 atm.

Career Highlights

Kazuhiko Tomomatu is associated with Fujikura Limited, where he has been able to apply his expertise in materials science. His work has not only contributed to the company's research and development but has also positioned him as a key figure in the field of crystal growth.

Collaborations

Kazuhiko has collaborated with notable coworkers, including Akihito Kurosaka and Osamu Nakao. Their combined efforts have furthered the research and development of advanced materials.

Conclusion

Kazuhiko Tomomatu's innovative work in the preparation of barium titanate single crystals exemplifies the impact of dedicated research in materials science. His contributions continue to influence various technological advancements.