Hall , Charles Martin
(1863–1914) American chemist
Hall was born in Thompson, Ohio, and educated at Oberlin College, graduating in 1885. He became interested in the costly process of manufacturing aluminum – until the late 19th century aluminum was a precious metal costing about $5.50 an ounce. Napoleon III would have the majority of his guests served from gold plate; he and the chosen few he wished to impress were served from aluminum plates. Hall was stimulated by a remark of his teacher that anyone who could find a cheap way to make aluminum would win great wealth and fame.
Although the ore itself (bauxite, aluminum oxide) was cheap and plentiful, the metal could only be extracted by electrolysis of the molten ore, and aluminum oxide has a very high melting point. Hall tried various added compounds and, in 1886, found that adding 10–15% of cryolite (sodium aluminum fluoride) reduced the melting point to a little over 1000°C. Hall produced his first sample in the form of buttons, which soon became known as the ‘aluminum crown jewels’. The French chemist Paul Héroult(1863–1914) discovered the process independently at about the same time and the electrolytic method for extracting aluminium is called the Hall-Héroult process. Hall helped to found the Pittsburgh Reduction Company (later the Aluminum Company of America), of which he became vice-president in 1890.

Scientists. . 2011.

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  • Hall, Charles Martin — born Dec. 6, 1863, Thompson, Ohio, U.S. died Dec. 27, 1914, Daytona Beach, Fla. U.S. chemist. He attended Oberlin College, where, soon after graduating in 1885, he discovered the method of producing aluminum by electrolysis (simultaneously with… …   Universalium

  • Hall, Charles Martin — (6 dic. 1863, Thompson, Ohio, EE.UU.–27 dic. 1914, Daytona Beach, Fla.). Químico estadounidense. Estudió en el Oberlin College y descubrió, luego de graduarse en 1885, el método de producir aluminio por electrólisis (simultáneamente con Paul… …   Enciclopedia Universal

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  • Charles Martin Hall — Born December 6, 1863 Thompson, Ohio Died December 27, 1914 Daytona, Florida …   Wikipedia

  • Charles Martin Hall — (6 de diciembre de 1863 27 de diciembre de 1914) fue un inventor e ingeniero estadounidense, famoso por su descubrimiento en 1886 de un método barato para producir aluminio, que se convirtió así en el primer metal en lograr un uso generalizado… …   Wikipedia Español

  • Charles Martin Hall — Pour les articles homonymes, voir Hall. Charles Martin Hall. Charles Martin Hall (1863 1914) est un ingénieur américain. Il a inventé le procédé élect …   Wikipédia en Français

  • Charles Martin Hall — (* 6. Dezember 1863 in Thompson (Ohio); † 27. Dezember 1914 in Daytona, Florida) war ein amerikanischer Erfinder, Ingenieur und Unternehmer. Er wurde bekannt durch seine Entdeckung einer kostengünstigen Methode zur Herstellung von Aluminium.… …   Deutsch Wikipedia

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  • Hall, Charles Francis — ▪ American explorer born 1821, Rochester, N.H., U.S. died Nov. 8, 1871, Thank God Harbor, Greenland       American explorer who made three Arctic expeditions.       Hall spent his early life in Ohio, where he held such various jobs as those of… …   Universalium

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