carbon black

any of various finely divided forms of amorphous carbon prepared by the partial combustion of hydrocarbons, as of natural gas, or by charring wood, bones, or other plant or animal tissues: used in pigments, as reinforcing agents in the manufacture of rubber products, and as clarifying or filtering agents.
[1885-90]

* * *

      any of a group of intensely black, finely divided forms of amorphous carbon, usually obtained as soot from partial combustion of hydrocarbons, used principally as reinforcing agents in automobile tires and other rubber products but also as extremely black pigments of high hiding power in printing ink, paint, and carbon paper. Carbon black is also used in protective coatings, plastics, and resistors for electronic circuits. As a reinforcing filler it greatly increases resistance to wear and abrasion. About one fourth of the weight of a standard automobile tire is carbon black. For tires on vehicles on which it is necessary to avoid building up an electrostatic charge, such as oil trucks and hospital operating carts, even more carbon black is added to make the rubber electrically conducting.

      Carbon black particles are usually spherical in shape and less regularly crystalline than graphite. Carbon black changes into graphite if heated at 3,000° C (5,400° F) for a prolonged period. Among the most finely divided materials known, carbon blacks vary widely in particle size depending on the process by which they are made. Channel or impingement black is made by the impingement of smoky flames from tiny jets on iron channels; the deposited black is scraped off by moving the channels over stationary scrapers. Furnace blacks are made in refractory chambers by incomplete combustion of any of various types of gaseous or liquid hydrocarbons. Thermal blacks are produced in the absence of air when hydrocarbons are decomposed by contact with heated refractories. Lampblack, the oldest known black pigment, is produced by burning oil, usually coal-tar creosote, in shallow pans, in a furnace with the draft regulated to give a heavy smoke cloud. Acetylene black is produced in refractory chambers in the absence of air by the decomposition of acetylene gas preheated to 800° C (1,500° F). It is used in applications requiring high electrical conductivity, such as dry cells.

* * *


Universalium. 2010.

Look at other dictionaries:

  • Carbon black — is a material produced by the incomplete combustion of heavy petroleum products such as FCC tar, coal tar, ethylene cracking tar, and a small amount from vegetable oil. Carbon black is a form of amorphous carbon that has a high surface area to… …   Wikipedia

  • carbon black — n. finely divided carbon produced by the incomplete burning of oil or gas: used in making rubber, ink, etc …   English World dictionary

  • Carbon Black — Carbon Black, aus Amerika kommender, durch Verbrennen von natürlichen Gasen unter vermindertem Luftzutritt hergestellter Ruß von tiefer Schwärze, aber mitunter etwas körniger Beschaffenheit. Andés …   Lexikon der gesamten Technik

  • carbon black — ● carbon black nom masculin Désignation de certains noirs de carbone …   Encyclopédie Universelle

  • carbon black — dujų suodžiai statusas T sritis chemija apibrėžtis Labai smulkūs C milteliai, susidarantys nevisiškai sudeginus gamtines dujas arba alyvą. atitikmenys: angl. carbon black; gas black; impingement black; micronex rus. газовая сажа; микронекс …   Chemijos terminų aiškinamasis žodynas

  • carbon black — suodžiai statusas T sritis chemija apibrėžtis Smulkiadispersė mikrokristalinė arba amorfinė anglis. atitikmenys: angl. black; carbon black rus. сажа …   Chemijos terminų aiškinamasis žodynas

  • carbon black — noun a black colloidal substance consisting wholly or principally of amorphous carbon and used to make pigments and ink • Syn: ↑lampblack, ↑soot, ↑smut, ↑crock • Derivationally related forms: ↑smut (for: ↑smut), ↑ …   Useful english dictionary

  • carbon black — noun Date: circa 1889 any of various colloidal black substances consisting wholly or principally of carbon obtained usually as soot and used especially in tires and as pigments …   New Collegiate Dictionary

  • carbon black — noun A fine black powder of amorphous carbon manufactured by the incomplete combustion of natural gas or oil, and used as a pigment in the manufacture of ink and paint. Used as a filler in rubber like polymers and rubber. It helps the polymers… …   Wiktionary

  • carbon black — car′bon black n. chem. any of various finely divided forms of amorphous carbon, used in pigments, in the manufacture of rubber products, and as clarifying or filtering agents • Etymology: 1885–90 …   From formal English to slang

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.