| 单词 | nernst lamp |
| 释义 | > as lemmasNernst lamp 2. attributive and in the genitive. Designating a kind of incandescent lamp used esp. as a source of infrared radiation, in which an unenclosed filament or rod consisting of a mixture of rare earths and other metallic oxides (as magnesia or zirconia) is made hot and luminous by the passage of an electric current (after first being brought to a conducting state by external heating). Also: designating the filament itself. Esp. in Nernst glower, Nernst lamp. Now chiefly historical. ΘΚΠ the world > matter > light > artificial light > an artificial light > artificial light defined by light-source > [noun] > incandescent lamp > specific types of Nernst lamp1898 turn-down1909 sun gun1960 1898 Science 24 June 856/2 The filament of Nernst's lamp is non-conducting when cold, but on being warmed it conducts, and then glows with a very brilliant light. 1898 Science 18 Nov. 689/1 (heading) The Nernst lamp. 1912 W. S. Franklin Electr. Lighting v. 134 There are five important kinds of glow lamps as follows:..(e) The Nernst lamp in which the glower is a small rod of porcelain-like material. 1950 L. J. Brady in M. G. Mellon Analyt. Absorption Spectrosc. viii. 444 One serious objection to the Nernst glower is the frequent mechanical failure of the source due to the poor bonding of the platinum leads to the element itself. 1952 Science 19 Dec. 687/1 A Nernst lamp or an ordinary tungsten lamp was suggested as a source of infrared light. 1965 J. R. Dyer Applic. Absorption Spectroscopy Org. Compounds iii. 24 A common light source for infrared radiation is the Nernst glower. 1980 Sci. Amer. May 123/2 The Welsbach mantle..proved to be a rich source of N rays. So did the Nernst glower. 2003 S. C. Singhal & K. Kendall High Temperature Solid Oxide Fuel Cells ii. 25 The light efficiency of the Nernst lamp exceeded that of the carbon filament lamp by nearly 80%. < as lemmas |
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