Hiroyuki Shikama

Title: Hiroyuki Shikama: Refractory Materials Inventor

Introduction

Hiroyuki Shikama is an inventor associated with Tokyo, Japan, and Shinagawa Refractories Co., Ltd. His work includes a patented refractory brick designed for demanding steelmaking applications.

Latest Patents

Shikama is associated with 1 patent, titled “Refractory brick.” The invention describes a brick intended to provide durability comparable to alumina-magnesia castable materials, particularly for use in steelmaking ladles. It is made from alumina and magnesia raw materials, with at least 90% of the raw material consisting of fine powder no larger than 0.5 mm. The materials are press-molded and heat-treated at temperatures from 100°C to 1,150°C. The patent specifies a composition containing at least 90% by mass of alumina and magnesia combined, 4–16% magnesia, 0.5–5% silica, and 0.3–2% sodium oxide and potassium oxide combined, with the balance consisting of alumina and unavoidable impurities.

Career Highlights

Shikama’s documented patent work focuses on refractory materials and their performance in steel production. The brick’s specified composition and manufacturing process address durability in the demanding conditions of a steelmaking ladle.

Collaborations

Shikama’s listed coworkers include Ryosuke Nakamura and Hisashi Tomiya. His patent work is associated with Shinagawa Refractories Co., Ltd.

Conclusion

Hiroyuki Shikama’s patent documents a refractory brick designed to combine a defined alumina-magnesia composition with durability suited to steelmaking ladles.