Hiroyuki Kosokabe

Title: Hiroyuki Kosokabe: Innovator in Glass Technology

Introduction

Hiroyuki Kosokabe is a prominent inventor based in Yamagata, Japan. He has made significant contributions to the field of glass technology, holding a total of 7 patents. His work focuses on developing specialized glass compositions for various applications, particularly in electronic and lighting technologies.

Latest Patents

One of his latest innovations is the infra-red absorption glass for a reed switch. This glass is designed for encasement of a reed switch using magnetic wire members made of Fe-Ni based alloy (52 alloy). The infra-red absorption glass has an infra-red transmittance at a wavelength of 1050 nm that is not greater than 10% for a thickness of 0.5 mm, with a chlorine content not exceeding 150 ppm. Additionally, it features a coefficient of thermal expansion in a temperature range between 30 and 380°C, ideally between 85-100×10/°C. The composition of this glass consists of 60-75% SiO, 1-10% AlO, 0-10% BO, 3.5-10% RO (where R includes one or more elements such as Ca, Mg, Ba, Sr, and Zn), 0.5-5% LiO, 8-17% NaO+KO, and 2-10% FeO.

Another notable patent is the tungsten sealing glass for use in fluorescent lamps. This glass has a composition of 65-76% SiO, 10-25% B O, 2-6% Al O, 0.5-5.8% of a mixture of MgO, CaO, SrO, BaO, and ZnO, 3-8% of a mixture of Li O, Na O, and K O, 0.01-4% of Fe O and CeO, 0.1-5% TiO, and 0.1-10% of a mixture of TiO, Sb O, and PbO, with a maximum of 2% ZrO. The ratio of Na O to the sum of Na O and K O is maintained at less than or equal to 0.6.

Career Highlights

Hiroyuki Kosokabe is currently employed at