noble metal

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metal

 [met´'l]
any chemical element marked by luster, malleability, ductility, and conductivity of electricity and heat, and which will ionize positively in solution. adj., adj metal´lic.
alkali metal one of a group of monovalent elements including lithium, sodium, potassium, rubidium, and cesium.
metal fume fever an occupational disorder with malaria-like symptoms occurring in those engaged in welding and other metallic operations and due to the volatilized metals. It includes brassfounder's fever (brass chill, brazier's chill) and spelter's fever (zinc chill, zinc fume fever).
heavy metal one with a high specific gravity, usually defined to be above 5.0.
heavy metal poisoning poisoning with any of the heavy metals, particularly antimony, arsenic, cadmium, lead, mercury, thallium, or zinc.
noble metal a metal that is highly resistant to oxidation and corrosion.

no·ble met·al

a metal that cannot be oxidized by heat alone, nor readily dissolved by acid, for example, gold, platinum.
Synonym(s): noble element

noble metal

A metal that resists corrosion or oxidation. Examples are gold, platinum, and silver.
See also: metal

no·ble met·al

(nōbĕl metăl)
Any metallic element used in dental restorations and appliances that resists tarnish, corrosion, and oxidation during heating or in intraoral environments (e.g., gold, platinum).
References in periodicals archive ?
Noble metals were still required for catalyst regeneration in the rich conditions.
The optimized parameters of the DCP model for noble metals are shown in Table 1.
Catalysts reviewed for formaldehyde removal as reported in the literature are mainly transition metal oxide and noble metal doped on a substrate, which was metal oxide in many cases.
Testing indicates that MST and mMST exhibit good affinity for the adsorption of noble metal, mercury and cadmium compounds from both water and PBS.
According to Fukui, the company will need to reduce the amount of noble metals used for fuel cells, improve hydrogen storage and lower production costs of hydrogen before mass production is possible.
Cluster of noble metals can be produced by thermal decomposition of their mercaptides at moderately low temperatures (180-250[degrees]C).
Energy densities are optimized for ablation of various materials, including glass, steel, noble metals, plastics, ceramics and biological matrices.
Norwegian mineral fertilisers producer Yara International ASA said on Thursday (23 February) that it had signed an agreement with Johnson Matthey Plc, Noble Metals for cooperation on sales and marketing of its nitrous oxide catalyst.
That is why platinum or gold (or any other inert metallic element) is used for those probes; these noble metals are electrical conductors, but not subject to oxidation.
The chromated aluminum coupons corrode very little when they are in contact with nonconductive elastomer gaskets, but they can suffer large amounts of corrosion in contact with gaskets made with relatively noble metals.
Typical roles for Tegal's etching systems used in MEMS and biochip fabrication include producing structures in silicon, silicon nitride, and silicon dioxide, in organic materials like BCB and polyimide and in noble metals, like platinum and gold.
The precision printing of noble metals and advanced decorating technologies placed Noritake in a unique position to develop sophisticated electronic products including vacuum fluorescent displays (VFD), printed thick film ceramic circuit substrates, plasma display panels and custom ceramics for industrial and medical applications.