-
1 neodymium alloy
Englsh-Russian aviation and space dictionary > neodymium alloy
-
2 alloy
сплав; припой; легирующий элемент; примесь; сплавлять; легироватьberyllium filamented reinforced alloy — сплав, армированный нитями бериллия
boron-fiber reinforced aluminum alloy — алюминиевый сплав, армированный борволокном
differentially solidified nickel-based alloy alloy — дифференциально закристаллизованный сплав на никелевой основе
high-melting point brazing alloy — тугоплавкий [жаропрочный] припой
stainless-steel-wire reinforced aluminum alloy — алюминиевый сплав, армированный проволокой из нержавеющей стали
steel-fiber reinforced aluminum alloy — сплав алюминия, армированный стальной нитью
tungsten reinforced oxidation resistant columbium alloy — стойкий к окислению ниобиевый сплав, армированный вольфрамом
— - chromium alloy -
3 Welsbach, Baron Carl Auer von
[br]b. 1 September 1858 Vienna, Austriad. 4 August 1929 Treibach, Austria[br]Austrian inventor of the gas mantle.[br]Welsbach studied at Vienna Polytechnic and then at Heidelberg under the distinguished German chemist Bunsen. He carried out research into the rare earth elements and in 1885 succeeded in separating didymium into two earths, neodymium and praesodymium. He observed that asbestos fibres impregnated with rare earths, when strongly heated, gave off a bright light. This was the basis for his invention of the incandescent gas mande, which he patented in 1885. He found that a mixture of 99 per cent thoria and 1 per cent ceria produced the best light. The invention was well timed, for during the 1880s gas light was being challenged by the new electric light and the Welsbach mande gave gas light a new lease of life. It was in wide use by 1900, and in that year it was further improved by the introduction of the inverted mande burner which had a higher light efficiency and better light distribution. For industrial and street lighting, Welsbach and Lucas achieved still higher efficiencies using the regenerative principle. Welsbach sought a use for the ceria waste from the lamps and formed an alloy of 35–40 per cent ceria with iron, known as Auer metal. This material is in wide use as the flint in cigarette and gas lighters.[br]BibliographyArticles in J. Chem. Ed., 1929, pp. 2,051–2, and Chemical News, 1902, pp. 254–6.LRDBiographical history of technology > Welsbach, Baron Carl Auer von
См. также в других словарях:
Neodymium magnet — Nickel plated neodymium magnet on a bracket from a hard drive. Nickel plated neodymium m … Wikipedia
rare-earth element — /rair errth /, Chem. any of a group of closely related metallic elements, comprising the lanthanides, scandium, and yttrium, that are chemically similar by virtue of having the same number of valence electrons. Also called rare earth metal. [1955 … Universalium
Mischmetal — Carl Auer von Welsbach Mischmetal (from German: Mischmetall mixed metal ) is an alloy of rare earth elements in various naturally occurring proportions. It is also called cerium mischmetal, rare earth mischmetal or misch metal. A typical… … Wikipedia
Fission products (by element) — On this page, a discussion of each of the main elements in the fission product mixture from the nuclear fission of an actinide such as uranium or plutonium is set out by element. Krypton 83 86 Krypton 85 is formed by the fission process witha… … Wikipedia
Electropositive shark repellent — Electropositive metals (EPMs) are a new class of shark repellent materials that produce a measurable voltage when immersed in an electrolyte. The voltages produced are as high as 1.75 eVDC in seawater. It is hypothesized that this voltage… … Wikipedia
Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… … Universalium
Nd:YAG laser — with lid open showing frequency doubled 532 nm green light Nd:YAG laser rod … Wikipedia
Antimony — This article is about the element. For the town, see Antimony, Utah. Not to be confused with Antinomy, a type of paradox. tin ← antimony → tellurium As ↑ Sb ↓ Bi … Wikipedia
Praseodymium — (pronEng|ˌpreɪzioʊˈdɪmiəm or IPA|/ˌpreɪsioʊˈdɪmiəm/) is a chemical element that has the symbol Pr and atomic number 59. Characteristics Praseodymium is a soft silvery metal in the lanthanide group. It is somewhat more resistant to corrosion in… … Wikipedia
Rare-earth magnet — Rare earth magnets are strong, permanent magnets made from alloys of rare earth elements. Rare earth magnets are substantially stronger than ferrite or alnico magnets. The magnetic field typically produced by rare earth magnets can be in excess… … Wikipedia
Magnet — This article is about objects and devices that produce magnetic fields. For a description of magnetic materials, see magnetism. For other uses, see Magnet (disambiguation) … Wikipedia