Coolidge, WD

Japanese: Coolidge,W.D.(英語表記)CoolidgeWD
Coolidge, WD

…Although manufacturing is difficult due to its high melting point, the use of these materials has expanded due to the development of manufacturing and processing methods for processable materials. At the beginning of the 20th century, American William David Coolidge (1873-1975) succeeded in manufacturing tungsten wire, which was used for light bulb filaments, revolutionizing lighting. Because tungsten has a high melting point and is difficult to melt, he succeeded in producing a material that could be processed into thin wires by solidifying tungsten powder and sintering it in a high-temperature hydrogen atmosphere. …

*Some of the terminology that mentions "Coolidge, WD" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…融点が高いことから製造は難しいが,加工できる材料の製造法と加工法の開発によって,これらの材料の利用が拡大してきた。 20世紀の初めにアメリカのクーリッジWilliam David Coolidge(1873‐1975)がタングステン線の製造に成功し,これが電球のフィラメントに応用されて照明に革命をもたらした。融点が高く溶解が難しいので,タングステンの粉末を固め,高温の水素雰囲気中で焼結し,細い線に加工できる材料の製造に成功した。…

※「Coolidge,W.D.」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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