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Topic: Barium oxide

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barium sulfate

Barium nitrate

barium chloride

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	Barium - Wikipedia, the free encyclopedia
		Barium is a chemical element in the periodic table that has the symbol Ba and atomic number 56.
		Its oxide is historically known as baryta but it reacts with water and carbon dioxide and is not found as a mineral.
		Barium oxide is used in a coating for the electrodes of fluorescent lamps, which facilitates the release of electrons.
	en.wikipedia.org /wiki/Barium (705 words)

	barium. The Columbia Encyclopedia, Sixth Edition. 2001-05
		Barium is often used in barium-nickel alloys for spark-plug electrodes and in vacuum tubes as a drying and oxygen-removing agent.
		Barium carbonate is used in glass, as a pottery glaze, and as a rat poison.
		Barium oxide strongly absorbs carbon dioxide and water; it is used as a drying agent.
	www.bartleby.com /65/ba/barium.html (348 words)

	BARIUM
		Barium metal is manufactured by the King process, in which barium oxide is reduced by aluminum at 1,830 degrees Ferenheit in a vacuum furnace at low pressure.
		Uses of barium sulfate are as a flux in glass manufacture to lower the melting point of oxide mixtures, as a filler in paints, as an inner white vase in photographic paper, leather, and cloth, and as a remover of dirt and ground rock in treatment of oil wells.
		Barium chloride is used as a flux in glass manufacture of magnesium metal, as a raw material in forming barium colors, and as a substance in heat-treating baths.
	lakeview.esu7.org /science/ba.htm (608 words)

	Yttrium barium copper oxide - Wikipedia, the free encyclopedia
		Superconductivity was first observed in 1911 when Heike Kamerlingh Onnes was investigating the resistance of mercury cooled in liquid helium.
		Seventy-five years later, Georg Bednorz and Alex Müller, working at IBM in Zurich Switzerland, discovered that certain semiconducting oxides became superconducting at the then relatively high temperature of 35 K. Bednorz and Müller found a motif for high temperature superconductors in lanthanum barium copper oxide.
		Oxide materials such as this are brittle, and forming them into wires is difficult.
	en.wikipedia.org /wiki/YBCO (856 words)

	Barium enema (Site not responding. Last check: 2007-10-30)
		Whereas barium hydroxide is highly acid since it forms soluble barium hydroxide inward irrigate, barium sulphate is not risky barium enema on bill of the fact that it is near insoluble inward piddle..
		Barium carbonate is secondhand inwards the ceramics and chalk diligence as good barium enema as to fighting rodents inwards farming.This paginate barium enema was live modified 07:50, 13 April 2006.No spraying barium device is visible when the exposure is magnified.
		Barium metal behind likewise constitute islated from the reducing of barium oxide, barium enema bao, with aluminium.
	locate66.t35.com (1552 words)

	Barium or chromium additives to magnesium oxide coating slurry - Patent 4512823
		The instant invention is directed to a slurry for use in coating silicon steel prior to high temperature annealing, comprising magnesium oxide, water and at least one inorganic compound selected from the group consisting of barium oxide, barium nitrate, chromium nitrate, and their hydrates.
		The suspension comprises a quantity of magnesium oxide in water and is mixed sufficiently for the desired application; the magnesium oxide may be hydrated to an extent dependent on the character of the oxide used, the duration of mixing and the temperature of the suspension.
		During this anneal, a portion of the magnesium oxide coating reacts with the silica on the surface of the silicon steel to form a glass-like coating of magnesium silicate.
	www.freepatentsonline.com /4512823.html (1332 words)

	It's Elemental - The Element Barium
		Barium is used as a getter, a material that combines with and removes trace gases from vacuum tubes.
		Barium carbonate is used to purify some chemical solutions and is the primary base material for the manufacture of other barium compounds.
		Barium oxide (BaO) easily absorbs moisture and is used as a desiccant.
	education.jlab.org /itselemental/ele056.html (342 words)

	Barium and Compounds (CASRN 7440-39-3), IRIS, Environmental Protection Agency
		Barium concentrations in upper, middle, and lower sections of the femur were increased by approximately three-orders of magnitude in the high dose groups when compared to controls.
		The database on the toxicity of inhaled barium compounds in humans consists primarily of studies of occupational exposure to barium sulfate or barite ore or to unspecified soluble barium compounds.
		(1962) The absorption of calcium, strontium, barium and radium from the gastrointestinal tract of the rat.
	www.epa.gov /iris/subst/0010.htm (10328 words)

	BARIUM and COMPOUNDS / Toxicology - Edouard Bastarache (Site not responding. Last check: 2007-10-30)
		Barium compounds are not reputed to penetrate by skin unless the cutaneous barrier is broken as in chemical burns; a case has been described in the relevant medical literature which had been caused by barium chloride in fusion.
		Absorbed barium is mainly deposited in bones, which accounts for 93% of the body burden in man. It is mainly excreted in feces and a small part (1 to 10%) in urine.
		Barium chloride dihydrate was not mutagenic in Salmonella typhimurium, nor did it induce sister chromatid exchanges or chromosomal aberrations in cultured Chinese hamster ovary cells.
	ceramic-materials.com /cermat/education/162.html (1280 words)

	BARIUM AND BARIUM COMPOUNDS (CICAD 33, 2001)
		Barium is used in the manufacture of alloys, soap, rubber, and linoleum; in the manufacture of valves; as a loader for paper; and as an extinguisher for radium, uranium, and plutonium fires.
		Barium sulfate is present in soil through the natural process of soil formation; barium concentrations are high in soils formed from limestone, feldspar, and biotite micas of the schists and shales (Clark and Washing ton, 1924).
		Barium sulfate instilled in the trachea or bronchus of laboratory animals was present in the lungs for up to 126 days after administration and induced local increases in the number of polymorphonuclear leukocytes 1 day post-instillation, followed by an increase in macrophages.
	www.inchem.org /documents/cicads/cicads/cicad33.htm (17575 words)

	Barium titanium oxide-containing fluidizable cracking catalyst composition - Patent 4791085
		A catalyst according to claim 5, wherein said barium titanium oxide and said zeolitic, crystalline aluminosilicate are embedded in 10 to 90 percent by weight of said matrix material.
		This compound, however, and many other barium compounds are not quite suitable to be used for composing a metal resistant cracking catalyst, as appears from metal resistance and micro-activity tests (referred to as MR test and MAT test, respectively).
		For instance, the barium titanium oxide and the aluminosilicate may be combined with the matrix material when the latter material is already in the gelled state.
	www.freepatentsonline.com /4791085.html (2602 words)

	RAIS: Barium (7440393)
		The average barium concentration for the mortality study was 7.3 mg/L, which corresponds to a dose of 0.20 mg/kg/day assuming drinking water consumption of 2 L/day for a 70 kg human.
		Barium oxide dust is considered to be a dermal and nasal irritant (Beliles 1994).
		Barium bioavailability as the chloride, sulfate or carbonate salt in the rat.
	risk.lsd.ornl.gov /tox/profiles/barium_f_V1.shtml (3318 words)

	Barium (Site not responding. Last check: 2007-10-30)
		Barium, Ba, is an alkaline earth metallic element found in Group IIa of the periodic table.
		Barium is used as a getter in the electronics industry, to remove the last traces of gases in vacuum tubes.
		Barium is detected by the green colouration it imparts to a flame.
	www.ucc.ie /ucc/depts/chem/dolchem/html/elem/elem056.html (197 words)

	Ceramic Oxide: BaO Barium Oxide, Baria (Site not responding. Last check: 2007-10-30)
		-Baria is the heaviest of the divalent fluxing oxides.
		Barium forms silicates slowly, but when completely combined it is very active as a fluxing agent.
		Barium glazes are well known for thier ability to produce matte turquoise colors with copper.
	ceramic-materials.com /cermat/oxide/bao.html (703 words)

	Interaction of Iron Oxide with Barium Peroxide and Hydroxide during the Decomposition of Sodium Chlorate
		Decomposition of sodium chlorate catalyzed by iron oxide in the presence of barium peroxide and hydroxide is studied by thermogravimetric analysis.
		Barium peroxide and hydroxide are moderately active catalysts by themselves but are inhibitors when used together with iron oxide.
		The catalytic activity change of the iron oxide in the presence of barium peroxide and hydroxide is discussed based on the electron configuration change of the iron ions.
	pubs.acs.org /cgi-bin/abstract.cgi/iecred/1997/36/i05/abs/ie9606754.html (180 words)

	Introduction to Superconductors
		The new ceramic oxide superconductors are type II superconductors and early research indicated upper critical fields that appear to be at least as high as anything yet discovered.
		The similar rare earth ceramic oxide, thulium-barium-copper-oxide, was reported to have a critical field of 36 Tesla at liquid nitrogen temperature and 100 Tesla or greater at liquid helium temperature.
		The most common method of making the yttrium-barium-copper oxide superconductors is to mix dry powders of yttrium oxide, barium carbonate, and cupric oxide in the proper molecular ratios.
	www.webcom.com /cfsc/scintro.html (3108 words)

	ORNL's Thin-Film Waveguide and the Information Highway
		Barium titanate is both a perovskite (a mineral with a roughly cubic crystal structure like that of silicon and MgO) and a ferroelectric (a material in which the positive and negative ions move apart, setting up electric fields within the crystal).
		Titanium and barium are vaporized and reacted with oxygen to make alternating layers of titanium oxide and barium oxide, which are aligned to form a barium titanate waveguide film.
		Characterization of our waveguides produced by growing nearly perfect thin films of barium titanate on magnesium oxide has shown that their ability to channel light with little loss in intensity is as good or better than that of bulk titanium-drifted lithium niobate waveguides.
	www.ornl.gov /info/ornlreview/rev27-3/text/wav.htm (3440 words)

	Reactions of the Group 2 elements with air or oxygen
		To be able to make any sensible comparison, you would have to have pieces of metal which were all equally free of oxide coating, with exactly the same surface area and shape, exactly the same flow of oxygen around them, and heated to exactly the same extent to get them started.
		Barium: I have only seen this burn on video, and although the accompanying description talked about a pale green flame, the flame appeared to be white with some pale green tinges.
		Barium peroxide can form because the barium ion is so large that it doesn't have such a devastating effect on the peroxide ions as the metals further up the Group.
	www.chemguide.co.uk /inorganic/group2/reacto2.html (1706 words)

	The World Market for Natural Barium Sulfate (Barytes) and Natural Barium Carbonate (Witherite) Excluding Purified ...
		Chapter 4 does the same, but for imports of natural barium sulfate (barytes) and natural barium carbonate (witherite) excluding purified barium oxide for all countries in the world.
		Combined, Chapters 3 and 4 present the complete picture for imports and exports of natural barium sulfate (barytes) and natural barium carbonate (witherite) excluding purified barium oxide to and from all major countries in the world.
		The SITC code that defined "natural barium sulfate (barytes) and natural barium carbonate (witherite) excluding purified barium oxide" is 27892.
	www.marketresearch.com /map/prod/1029202.html (1221 words)

	The Chemical Engineers' Resource Page (Site not responding. Last check: 2007-10-30)
		Barium Carbonate (Powder and Granular) Formula: BaCO3 Molecular weight: 197.35 Property: It has three crystal state, monoclinic, hexagon and cubic.
		Forming barium sulfate when combining with sulphuric acid.
		Zinc Oxide (99.7%, 99.5%, 99%, 98%, 95%) Name of Commodity: Zinc oxide Molecular Formula: ZnO Molecular Weight: 81.39 Property: This commodity is a white powder, its density is 5.606, its melting point is 1975??.
	www.cheresources.com /forums/forum1/thread_full23.shtml (4313 words)

	Amazon.com: barium (Site not responding. Last check: 2007-10-30)
		BARIUM SILICATE MINERALS FROM TRUMBULL PEAK, MARIPOSA COUNTY, CALIFORNIA.: An article from: The Mineralogical Record by Gail E. Dunning and Joseph F. Jr.
		Barium meal-induced gastric perforation.(Images in Surgery): An article from: Indian Journal of Surgery by Siddharth Lakhotia and G.P. Shrivastava (Mar 1, 2004)
		Barium Property Data on MatWeb -- MatWeb has detailed property information on over 20,000 entries including Barium and other polymers, metals and engineering materials.
	www.amazon.com /s?ie=UTF8&search-alias=aps&keywords=barium&page=1 (301 words)

	YBCO Information Center - yttrium barium copper oxide ribbon 212 ybco
		Without divulging information about the elements of their samples, Maw-Kuen told Peiherng, "We just did what we discussed previously (in Houston in early January)." Peiherng, Ruling and I reviewed all our previous data and decided to make a few new samples containing the newly arrived Y and Yb oxides.
		Unfortunately, we failed to see any stable superconductivity at 90 K. Maw-Kuen and Jim arrived at Houston the next morning of January 30 with their samples which had a nominal formula of Y
		Yttrium barium copper oxide is used commercially in the fabrication yttrium barium copper oxide ribbon 212 ybco of superconducting tapes and microwave filters.
	www.scipeeps.com /Sci-Chemistry_Topics_W_-_Z/YBCO.html (505 words)

	PSILOMELANE (Barium Manganese Oxide Hydroxide)
		Still in use around the world the name is applied to hydrated barium bearing manganese specimens.
		The difficulty in distinguishing romanechite from other barium manganese oxides, that are probably mixed together in the same specimen, is why the name psilomelane is still in use.
		The mining term "wad" is used to indicate ores that are a mixture of several manganese oxides such as psilomelane, pyrolusite and others that are difficult to distinguish.
	mineral.galleries.com /minerals/oxides/psilomel/psilomel.htm (346 words)

	Chemistry : Periodic Table : barium : compound data [barium (II) oxide]
		For each compound, and where possible, a formal oxidation number for each element is given, but the usefulness of this number is limited, especially so for p-block elements in particular.
		Based upon that oxidation number, an electronic configuration is also given but note that for more exotic compounds you should view this as a guide only.
		Barium oxide is made by the thermolysis of salts such as barium carbonate
	www.webelements.com /webelements/compounds/text/Ba/Ba1O1-1304285.html (323 words)

	Athiappa Chemicals - Barium: manufacturer of barium sulphide,barium carbonate,barium chloride,barium nitrate,sodium ...
		Treatment of the brine with Barium Carbonate removes Sulphates as insoluble Barium Sulphate and Calcium and Magnesium Salts as their insoluble Carbonates.
		n the glass industry, formulae containing various percentages of Barium Oxide are used for several purposes.
		To obtain Barium Oxide of requried percentage, Barium Carbonate is added to the mix.
	www.athiappa.com /barium.htm (454 words)

	ROMANECHITE (Hydrated Barium Manganese Oxide)
		The mining term "wad" is used to indicate ores that are a mixture of several manganese oxides such as psilomelane (romanechite), pyrolusite and others that are difficult to distinguish.
		Color is variable from iron-fl to bluish fl to steel gray.
		Associated Minerals are barite, hematite, quartz, pyrolusite and other manganese oxide minerals.
	mineral.galleries.com /Minerals/OXIDES/romanech/romanech.htm (270 words)

	Barium metaborate Use
		Barium metaborate - Pesticide use statistics for 2003
		with boron oxide (B2O3) (1:1), Bariummetaboraat, Bariummetaborate, Boric acid (HBO2), barium salt, Boric acide (H2B2O4), barium salt (1:1), Boron oxide (B2O3), compd.
		with barium oxide (1:1), Busan 11M1, Butrol 11M1, Metaboric acid, barium salt
	www.pesticideinfo.org /Detail_ChemUse.jsp?Rec_Id=PC34837 (1012 words)

	Structure of YBCO (Yttrium Barium Copper Oxide)
		YBCO has what is called a Perovskite structure.
		This refers to the kind of layering seen in this complex metal oxide.
		The research that we do in our group is aimed at finding better ways to make YBCO.
	www.ch.ic.ac.uk /otway/YBCO.html (84 words)

	Mechanism for NO2 Storage in Barium Oxide Supported on Magnesium Oxide Studied by in Situ Raman Spectroscopy (Site not responding. Last check: 2007-10-30)
		Mechanism for NO2 Storage in Barium Oxide Supported on Magnesium Oxide Studied by in Situ Raman Spectroscopy
		The mechanism for NO storage in barium oxide supported on magnesium oxide (BaO/MgO) was investigated.
		In situ Raman spectroscopy was used to follow temporal changes in the composition of the catalyst that occurred during the reaction with NO Up to catalyst temperatures of 400
	pubs.acs.org /cgi-bin/abstract.cgi/jpcbfk/2002/106/i25/abs/jp0206976.html (195 words)

	Yttrium barium copper oxide - Free net encyclopedia (Site not responding. Last check: 2007-10-30)
		Yttrium barium copper oxide - Free net encyclopedia
		Because liquid nitrogen, with a boiling point of 77K, is significantly less expensive than liquid helium, YBCO enabled a number of commercial applications.
		Yttrium barium copper oxide is used commercially in the fabrication of superconducting tapes and microwave filters.
	www.netipedia.com /index.php/YBCO (200 words)

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