Yoshikazu Sakai

Title: Yoshikazu Sakai: Inventor of High-Strength Cu–Ag Conductive Materials.

Introduction

Yoshikazu Sakai is an inventor associated with Ibaraki, Japan. His work includes a patented method for producing a high-strength, conductive copper–silver alloy material. Sakai is listed as the inventor on 1 patent.

Latest Patents

Sakai’s patent, “Method of Producing Cu–Ag Alloy-Based Conductive Material,” describes a process for making an alloy containing approximately 10% to 20% silver by atomic percentage. The method continuously casts the alloy into a rod and quickly cools it, then cold-works the rod to reduce its cross-sectional area by at least 80%. The rod is heat-treated at 250°C to 350°C for at least one hour, followed by further cold-working to achieve a reduction in area of at least 90%, measured relative to the cast rod. The resulting material is designed to achieve a tensile strength of at least 700 MPa and conductivity of at least 75% IACS.

Career Highlights

Sakai’s listed professional affiliations include Showa Electric Wire & Cable Co., Ltd., and the National Research Institute for Metals, where he is identified as a general director. These affiliations connect his work with industrial wire and cable production as well as metals research.

Collaborations

Sakai’s listed coworkers include Tomoyuki Kumano and Tooru Hirota. Their names provide context for the professional network associated with his work.

Conclusion

Yoshikazu Sakai’s patent documents a carefully sequenced casting, cooling, cold-working, and heat-treatment process for producing Cu–Ag conductive material with high strength and conductivity.