Home > Science and Technology > Chemistry > Compounds and Elements

Topic:magnesia

Visit our new topic page about magnesia

magnesia

The Columbia Encyclopedia, Sixth Edition | Date: 2008

magnesia common name for the chemical compound magnesium oxide, MgO. It occurs as colorless, cubic crystals. It is refractory, melting at about 2,800°C. It is very slightly soluble in pure water but is soluble in acids and solutions of ammonium salts. The magnesia of commerce is a fine white powder used in soaps, cosmetics, pharmaceuticals, and as a filler in rubber goods. Magnesia is used to make crucibles and other ceramic goods. Crude magnesia is prepared by roasting dolomite (calcium magnesium double carbonate) or magnesite (magnesium carbonate). Pure magnesia is prepared by refining the crude product. Magnesia is also extracted from seawater. It occurs in nature as the mineral periclase.

Author not available, MAGNESIA., The Columbia Encyclopedia, Sixth Edition 2008

Related newspaper, magazine, and journal articles from HighBeam Research

	Magnesia, magnesite Mining Engineering; 6/1/2000; Manocha, M; 995 words ; Worldwide demand for magnesia (MgO) is predominantly driven by the use of magnesia-based refractories for steel production. There ... improvements in refractory application. This decrease in magnesia consumption has been taking place since the mid-198 ... Read more
	Evolution of magnesia-carbon refractories. Ceramic Industry; 2/1/1995; Troell, Peter T.; 2809 words ; The development and refinement of magnesia-carbon brick, encompassing compositional ... bonded and burned, pitch impregnated magnesia brick in 1960, carbon has been recognized ... to develop improved carbon containing magnesia brick, where carbon was not merely a ... Read more
	Structural, physical and mechanical properties of modified wood-magnesia composite. Construction and Building Materials; 9/1/2007; Plekhanova, T.A. Keriene, J. Gailius, A. Yakovlev, G.I.; 3157 words ; ... physical and mechanical properties of wood-magnesia composites based on magnesium binder (caustic magnesia) and filler of wood sawdust modified with ... found that during the hydration of caustic magnesia containing fluorine anhydrite additive ... Read more
	Behavior of alumina-magnesia complex inclusions and magnesia inclusions on the surface of molten low-carbon steels Metallurgical and Materials Transactions; 2/1/2001; Kimura, Sei; Nakajima, K; Mizoguchi, S; 1940 words ; ... clusters. On the other hand, alumina-magnesia complex inclusions on the surface of ... inclusion was 93 mass pct alumina-7 mass pct magnesian, obtained in a Mg-added Al-killed steel ... second type of inclusion was nearly pure magnesia, obtained in a Mg-killed steel. The attractive ... Read more
	Kinetics and mechanism of carbothermic reduction of magnesia Metallurgical and Materials Transactions; 8/1/2003; Rongti, Li; Wei, Pan; Sano, Masamichi; 3016 words ; ... the effects of compacting pressure, magnesia/carbon ratio, heating rate, Ar carrier-g ... solid phase-boundary reaction between magnesia and carbon particles. The second stage ... magnesium chloride and thermal reduction of magnesia. Electrolysis is the predominant route ... Read more
	Industrial minerals 1997: Magnesite and magnesia Mining Engineering; 6/1/1998; McCracken, W H; Duncan, L R; 896 words ; ... animals, to larger amounts in the form of caustic magnesia for environmental applications. The largest application ... is in the refractory industry as a dead-burned magnesia. The main sources of magnesia are from natural magnesium carbonate ore and ... Read more
	Martin Marietta Magnesia Completes Phase Two at Baton Rouge Industrial Specialties News; 4/22/1996; 596 words ; Martin Marietta Magnesia Specialties (MMMS) of Baltimore, MD ... than two-fold increase in the price of magnesia increased its costs substantially ... of China. MTI imported some of its magnesia requirements in 1995 from North Korea ... Read more
	Minerals Technologies Signs Deal for North Korean Magnesia Industrial Specialties News; 6/26/1995; 268 words ; ... signed an agreement with the North Korean Magnesia Clinker Export and Import Co for supply of North Korean magnesia. Specific terms of the agreement were ... importation of tens of thousands of tons of magnesia. The agreement will result in the first ... Read more
	Magnesia expansion in Iran.(Industry News) Advanced Ceramics Report; 9/1/2004; 137 words ; ... IRRPCO) has raised its capacity for magnesia raw materials for refractories manufacture ... on-line 20 kt a year of various magnesia-based refractory co-clinkers. IRRPCO is the only producer of dead burned magnesia (DBM) in Iran and owns key magnesite ... Read more
	Rubber World Hotlinks @ rubberworld.com.(Martin Marietta Magnesia Specialties) Rubber World; 6/1/2001; 1313 words ; Martin Marietta Magnesia Specialties develops and markets chemicals ... rubber, plastic and others. Specialized magnesia products are available from this ISO ... and fluoroelastomers. Martin Marietta Magnesia Specialties also offers MagChem 40 ... Read more

See all related premium articles

Related entries from encyclopedias, dictionaries, and thesauruses

	magnesia World Encyclopedia magnesia Magnesium oxide (MgO), a white, neutral, stable powder formed when magnesium is burned in oxygen. It is used industrially in firebrick and medicinally in stomach powders. Magnesium carbonate, found as magnesite and also used as an antacid, is often called magnesia. Read more
	magnesia The Concise Oxford Dictionary of English Etymology magnesia A. †(alch.) mineral ingredient of the philosopher's stone XIV; B. †(spec. black m. ) manganese XVII; C ... magnesium oxide XVIII. — medL. magnēsia — Gr. (hē) Magnēsía (líthos) ‘the Magnesian stone’, (1) loadstone, (2) stone with silvery ... Read more
	milk of magnesia A Dictionary of Food and Nutrition milk of magnesia Magnesium hydroxide solution used as an antacid and laxative . Read more
	Magnesia ad Sipylum Britannica Concise Encyclopedia ... the Seleucids under Antiochus III (the Great), forcing them back across the Taurus Mountains . It suffered severe earthquakes, notably in 17, and there are few archaeological remains. Magnesia ad Sipylum Magnesia ad Sipylum Magnesia ad Sipylum Read more
	milk of magnesia The Oxford Pocket Dictionary of Current English milk of mag·ne·sia • n. a white suspension of hydrated magnesium carbonate in water, used as an antacid or laxative. Read more