Kei Yoshimura
Hitachi
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Publication
Featured researches published by Kei Yoshimura.
Japanese Journal of Applied Physics | 2011
Takashi Naito; Takuya Aoyagi; Yuichi Sawai; Shinichi Tachizono; Kei Yoshimura; Yuji Hashiba; Mamoru Yoshimoto
We optimized the fundamental composition and additives in a semiconducting V2O5–P2O5–TeO2 glass system to develop lead-free low-melting glass suitable for low-temperature sealing below 400 °C. Glass with a composition of 55.7V2O5–19.8P2O5–23.5TeO2 (mol %) has a low glass transformation temperature (Tg < 300 °C) as well as hard crystallization, and it is desired as a low-temperature sealing material. The effects of adding BaO, Sb2O3, MnO2, or Fe2O3 to the fundamental composition of 55.7V2O5–19.8P2O5–23.5TeO2 (mol %) on the thermal properties and water-vapor resistance were then characterized. Adding 11.7 mol % Fe2O3 improved the water-vapor resistance drastically and decreased the thermal expansion coefficient without increasing Tg. Sealing at 360 °C with our lead-free Fe2O3-added vanadate glass enabled practical airtight packaging on an electronic device.
Archive | 2010
Shinichi Tachizono; Kei Yoshimura; Yuji Hashiba; Takashi Naito; Takuya Aoyagi
Archive | 2010
Takashi Naito; Shinichi Tachizono; Kei Yoshimura; Yuji Hashiba; Keiichi Kanazawa; Shinji Yamada; Satoru Amou; Hiroki Yamamoto; Takuya Aoyagi
Archive | 2009
Satoru Amo; Takuya Aoyagi; Yuji Hashiba; Keiichi Kanazawa; Takashi Naito; Shinichi Tachizono; Shinji Yamada; Hirotaka Yamamoto; Kei Yoshimura; 孝 内藤; 圭 吉村; 悟 天羽; 浩貴 山本; 真治 山田; 裕司 橋場; 信一 立薗; 啓一 金澤; 拓也 青柳
Archive | 2009
Takashi Naito; Shinichi Tachizono; Kei Yoshimura; Hiroki Yamamoto; Hiroshi Yoshida; Shinji Yamada; Katsumi Mabuchi
Archive | 2010
Yuji Hashiba; Shinichi Tachizono; Kei Yoshimura; Takashi Naito; Takuya Aoyagi
Archive | 2010
Takashi Naito; Shinichi Tachizono; Kei Yoshimura; Yuji Hashiba; Keiichi Kanazawa; Shinji Yamada; Satoru Amou; Hiroki Yamamoto; Takuya Aoyagi
Archive | 2010
Kei Yoshimura; Shinichi Tachizono; Yuji Hashiba; Takashi Naito; Takuya Aoyagi
Archive | 2011
Takuya Aoyagi; Takashi Naito; Yuji Hashiba; Kei Yoshimura; Shinichi Tachizono
Journal of The Ceramic Society of Japan | 2013
Takashi Naito; Akifumi Matsuda; Daishi Shiojiri; Takuya Aoyagi; Yuichi Sawai; Tadashi Fujieda; Shinichi Tachizono; Kei Yoshimura; Yuji Hashiba; Mamoru Yoshimoto
