| 释义 |
alundum|əˈlʌndəm|
[f. aluminium + corundum.]
The proprietary name of a hard material produced by fusing alumina in an electric furnace, used chiefly as an abrasive agent.
U.S. Patent by C. B. Jacobs, 1900, but the word alundum was not used in it.
1904Sci. Amer. Suppl. 24 Sept. 24018/2 Alundum, the trade name for artificial corundum, is an abrasive made by a process due to C. B. Jacobs and others. 1905Trans. Faraday Soc. I. 301 Artificial corundum, or, as the Americans call it, ‘alundum’, also deserved notice..as, in addition to being highly refractory, it was of extreme hardness. 1906Westm. Gaz. 27 Dec. 2/1 The advent of the electric furnace has brought about a revolution by the introduction of alundum. 1918Nature 4 July 350/2 The fusion of bauxite gives another abrasive, alundum, which has practically superseded other materials for the grinding of steel. |