noble metal


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noble metal

n.
A metal or alloy, such as gold, that is highly resistant to oxidation and corrosion.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.noble metal - any metal that is resistant to corrosion or oxidation
metal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
atomic number 79, Au, gold - a soft yellow malleable ductile (trivalent and univalent) metallic element; occurs mainly as nuggets in rocks and alluvial deposits; does not react with most chemicals but is attacked by chlorine and aqua regia
atomic number 78, platinum, Pt - a heavy precious metallic element; grey-white and resistant to corroding; occurs in some nickel and copper ores and is also found native in some deposits
Ag, atomic number 47, silver - a soft white precious univalent metallic element having the highest electrical and thermal conductivity of any metal; occurs in argentite and in free form; used in coins and jewelry and tableware and photography
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations
ušlechtilý kov
jalometalli
nemesfém
edelmetall
References in periodicals archive ?
When two dissimilar materials are in contact, the more active one will tend to have accelerated corrosion while the corrosion rate of the more noble metal will decrease.
In recent years, there are significant efforts to search cheap metal nanoparticles in order to displace noble metal nanoparticles such as Au, Ag, and Pt, although the studies still have little research.
The surface plasmon resonance of noble metal nanoparticles can be easily monitored with UV-Vis spectroscopy [61], which directly determines the size and concentration of gold nanoparticles [62].
The most important factors controlling the catalytic activity of nanoscale noble metal catalysts appear to be the particle size, nature of support, and noble metal oxidation state [19].
There is a growing movement among semiconductor manufacturers to replace gold wire, which is currently the most widely used bonding wire for connecting lead frames and IC chips, with copper wire, which enables the cost of noble metal bullion to be reduced by approximately 90 percent.
Cluster of noble metals can be produced by thermal decomposition of their mercaptides at moderately low temperatures (180-250[degrees]C).
Moen Incorporated has received a patent for an article having on at least a portion of its surface, a coating of a thin transition layer consisting of a metal bearing material and having a composition that varies from an exterior first composition comprising a metal to a second composition beneath the exterior first composition, which transition layer is superimposed on a metal bearing color layer and is substantially transparent and colorless to visible light, in which the first composition is a noble metal chosen from the group consisting of gold, silver, platinum, platinum group metals, or an alloy thereof.
The metal was chosen for this year's award after evidence showing sales in the so called 'noble metal' have risen in the last five years from 500 ounces to 45,000 ounces.
Moreover, the effect of metal substrate was also tested: Ag substrate is comparably suited for Glaser coupling [25, 26], and Glaser coupling can be used highly efficiently to generate linear oligomer/polymer along the step-edges of the noble metal vicinal surface while inhibiting a variety of side-reactions resulting in irregularly branched polymeric networks [27].
But gold is an expensive noble metal and the price is unpredictable, strongly affecting manufacturing profit margins and, in the end, component prices.