Also found in: Dictionary, Thesaurus, Medical, Financial, Acronyms, Wikipedia.


Dull, as applied to appearance of a surface.
An impure metallic sulfide mixture produced by smelting the sulfide ores of such metals as copper, lead, or nickel.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



an intermediate product or a by-product in nonferrous metallurgy. A matte is an alloy of variable chemical composition that consists of iron sulfide and sulfides of nonferrous metals.

Owing to the low solubility of sulfides of nonferrous metals in oxide melts, the relatively low melting point (below 1100°C) of such sulfides, and the high density (greater than 4 g/cm3) of the sulfides, a molten matte separates from a slag upon smelting and forms a separate layer below the slag. A matte is a primary product into which copper, nickel, and cobalt go when a copper sulfide or nickel sulfide raw material is smelted or when oxide ores are processed by means of certain techniques. Mattes usually contain 10–50 percent Cu and Ni, 15–25 percent S, and Fe as the remainder.. Mattes are also produced in lead smelting when copper and sulfur are present in the raw material. As a rule, noble metals and metal impurities in raw materials accumulate in mattes.

Mattes are processed in a converter (seeCONVERTER BLOWING OF MATTE), where the sulfur is oxidized and the iron is converted from the sulfide form to the oxide form and, together with silica, yields converter slag. The copper sulfide and nickel sulfide are subjected to further processing after the iron is removed.

Nickel matte produced in smelting is sometimes called raw matte. A matte that is produced after converter blowing and has an iron content of less than 3 percent is referred to as converter matte. A matte with an intermediate iron content is known as furnace matte. Copper matte that is produced after the completion of the first blowing period and contains < 1 percent Fe is called white matte.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

matte, mat, matt

A surface finish which is dull, with little or no gloss or sheen, and with low light reflectivity.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
The matte white plastic case straddles the matte white silicone strap with matching loop and matte white plastic buckle.
A matte finish can still be wearable and comfortable - try Elizabeth Arden's new Moisturising Matte, PS21, for proof.
Since shine highlights imperfections, Dempsey thinks once people get used to using matte they'll grow to love it.
Keith Schmidt: Matte tin uses a different additive system.
to Ulta3 adding at least one supplier's matte offerings.
The Vivo V5s Matte Black has a 13-megapixel rear camera.
How To MasTer iT: 1 Chaps and dry patches will show up under a matte formula so exfoliate first with a sugar scrub (or some sugar mixed with olive oil).
A matte dark blue plastic case is presented with a matte blue silicone strap, dark blue silicone loop and a matte dark blue plastic buckle.
A matte black plastic bezel with green print is mounted on a matte black plastic case.
Mattes reports his findings in the current PHYSIOLOGY & BEHAVIOR (volume 74, number 3).
"Liquid calories don't trip our satiety mechanisms," says Mattes. "They just don't register."
Mattes tested for changes in concentrations of both cholesterol and triglycerides in the blood as the safflower oil was digested, but only the triglycerides varied from test to test, he reports in the June American Journal of Clinical Nutrition.