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Topic: Boric oxide


  
  Tribology at Rensselaer   (Site not responding. Last check: 2007-10-18)
Boric oxide is known to form lubricious boric acid surface films when exposed to moisture in the ambient air.
Results of pin-on-disk sliding tests demonstrated the boric oxide filler to be an effective means of reducing the coefficient of friction from 0.16 for unfilled PTFE to approximately 0.12 for 25% B2O3-filled PTFE slid in relative humidities greater than 15%.
Additionally, the boric oxide filler was effective in reducing the wear rate from 0.001 mm3/N-m for unfilled PTFE to approximately 2.6x10-5 mm3/N for 25% B2O3-filled PTFE slid in relative humidities greater than 25%.
www.rpi.edu /locker/87/001087/Research/Specifics/B2O3.html   (285 words)

  
 Hair Loss Help - Live Chat - Experts - Forums - Info - Products
the compound comprising boron is boric acid, and the compound comprising zinc is zinc oxide.
Preferably, the zinc-containing compound is zinc oxide, the boron-containing compound is boric acid, and the carrier suitable for topical application is a mixture of starch and water.
It is believed that the present invention works because the zinc oxide cleans the skin, the boric acid kills germs, and the starch assists in penetration of the zinc oxide and boric acid into the pores of the skin.
www.hairlosshelp.com /html/patentzincoxide.cfm   (3757 words)

  
 Nat' Academies Press, Toxicological Risks of Selected Flame-Retardant Chemicals (2000)
The physical and chemical properties of zinc borate, zinc oxide, and boric acid are summarized in Table 8–1.
Boric acid is used in enamels, porcelain, soaps, cosmetics, and as an insecticide.
Boric acid (5 mL, 10% w/v in water) and borax (10 mL, 5% w/v in water) were found to be moderate and mild irritants, respectively, in guinea pigs.
www.nap.edu /books/0309070473/html/149.html   (6643 words)

  
 Rio Tinto Borax : Library : Pioneer Magazine
Boric oxide, sodium oxide, and calcium oxide are all about equally effective at lowering high temperature viscosity when substituted for silica, while aluminum oxide is not effective.
This may be partly a function of bestowing increased durability, but it also seems that boric oxide helps to protect the interface between the glass fiber surfaces and their organic binder.
Boric oxide substitutions for silica are the only ones that have all the required properties, simultaneously decreasing high temperature viscosity, lowering liquidus temperature, increasing moisture resistance, and reducing surface tension.
www.borax.com /pioneer20.html   (812 words)

  
 Hair Loss Help - Live Chat - Experts - Forums - Info - Products
The original idea to use Zinc oxide for hair loss came out of a patent where Zinc oxide and Boric acid were combined and applied as a hair growth stimulant.
In a study Clinical studies on zinc oxide ointment replacing boric acid and zinc oxide ointment, it was shown that the zinc oxide ointment without boric acid had the same effect on wound healing as the boric acid and zinc oxide ointment.
Zinc Oxide is a cheap addition to any hair loss regime with proven benefits in wound healing and it very likely stimulates hair growth in humans as it does in animals.
www.hairlosshelp.com /html/zincoxide2.cfm   (1019 words)

  
 [No title]   (Site not responding. Last check: 2007-10-18)
In accordance with another aspect of the invention, a sintered ceramic composition comprises a major amount of aiumina, a minor amount of boric oxide, and a minor amount of at least two different alkaline-earth metal oxides, wherein the metal oxides are independently selected from beryllium oxide, magnesium oxide, calcium oxide, strontium oxide and barium oxide.
Boric oxide (B203) can be produced by heating boric acid until it fuses to form boric oxide and water vapor.
A sintered ceramic composition comprising: a major amount of alumina; a minor amount of boric oxide; and a minor amount of at least two different alkaline-earth metal oxides, wherein the metal oxides are independently selected from beryllium oxide, magnesium oxide, calcium oxide, strontium oxide and barium oxide.
www.wipo.int /cgi-pct/guest/getbykey5?KEY=01/44133.010621&ELEMENT_SET=DECL   (4136 words)

  
 Nanoscale Tribological Properties of Boric Acid Films on Boric Oxide Substrates   (Site not responding. Last check: 2007-10-18)
Boric acid (H_3BO_3) is a solid lubricant because of its lamellar crystal structure.
A thin lubricious boric acid film forms spontaneously when a boric acid (B_2O_3) substrate is exposed to humid air.
A film (presumably a phase of boric acid) up to 1500 nm thick covers the areas between the protrusions on B_2O_3 substrates and is easily worn away by the SFM tip.
flux.aps.org /meetings/YR98/BAPSMAR98/abs/S4830007.html   (223 words)

  
 boric acid. The Columbia Encyclopedia, Sixth Edition. 2001-05
The major uses of the boric acids are in forming other boron compounds and in borate salts, e.g., borax.
A dilute water solution of boric acid is commonly used as a mild antiseptic and eyewash.
Boric acid is also used in leather manufacture, electroplating, and cosmetics.
www.bartleby.com /65/bo/boricaci.html   (291 words)

  
 Crown glass (optics) - Wikipedia, the free encyclopedia
Crown glass is produced from alkali-lime silicates containing approximately 10% potassium oxide.
Borosilicates contain about 10% boric oxide, have good optical and mechanical characteristics, and are resistant to chemical and environmental damage.
Other additives used in crown glasses include zinc oxide, phosphorus pentoxide, barium oxide, and fluorite.
en.wikipedia.org /wiki/Crown_glass_(optics)   (191 words)

  
 Manufacturing plaster articles - Patent 5026428
In a typical application the concentration of boric acid in the aqueous solution is from 0.3 to 1.1 grams boric oxide per liter of solution and the preferred concentration of silicic acid in the aqueous solution is within the range of from 75 mls to 300 mls concentrated silicic acid per liter of aqueous solution.
By incorporating boric acid and/or silicic acid in the plaster, the amount of air entrapped in the powder is significantly reduced, the surface of a formed article is more resistant to abrasion and the article as a whole is both harder and stronger.
In each instance the stated amount of boric oxide is dissolved in water and then the stated amount of a concentrated silicic acid solution is added to the boric acid solution, boric acid being produced when boric oxide is dissolved in water.
www.freepatentsonline.com /5026428.html   (1839 words)

  
 Glass
Similar to sodium oxide, boric oxide is a powerful base with a high chemical resistance.
Boric oxide is an essential component in the production of optical glass.
The heat resistance of glass is attributable to boric oxide, which replaces sodium oxide in the structure of the glass, creating lower thermal expansion.
www.inkabor.com /en/Glass.htm   (72 words)

  
 boric acid Proposed Tolerance Exemption 6/93
Boric Acid and its Salts, Borax (Sodium Borate Decahydrate), Disodium Octaborate Tetrahydrate, Boric Oxide (Boric Anhydride), Sodium Borate and Sodium Metaborate; Tolerance Exemptions AGENCY: Environmental Protection Agency (EPA).
The petition requested that an exemption from the requirement of a tolerance be established as a result of the use of boric acid as a fire ant control bait in agricultural areas.
180.1121 Boric acid and its salts, borax (sodium borate decahydrate), disodium octaborate tetrahydrate, boric oxide (boric anhydride), sodium borate and sodium metaborate; exemption from the requirement of a tolerance.
pmep.cce.cornell.edu /profiles/insect-mite/abamectin-bufencarb/boric-acid/boric-acid-prop-tol.html   (873 words)

  
 Tribology Laboratory - University of Florida
The reaction between boric oxide and water vapor in the atmosphere will result in boric acid.
Boric acid is a lubricous lamellar solid at room temperature.
Polymers containing boric oxide fillers have shown excellent wear resistance properties and low friction coefficients as a result of this surface reaction with humid air.
grove.ufl.edu /~wgsawyer/Laboratory/WhitePapers/VPLwp.HTML   (1690 words)

  
 Doctors Oppose New Law that puts Poisonous Chemicals in All Our Mattresses
Boric acid and borate compounds in the body exist primarily as undissociated boric acid, which distributes evenly throughout the soft tissues of the body (Ku et al., 1991; Naghii and Samman, 1996b).
Boric acid is excreted primarily in the urine.
Boric Acid, a chemical made from the reaction of Sulfuric Acid and Borax, should not be confused with Boron salts that occur in nature.
www.supplepedic.com /newsrelease.htm   (7289 words)

  
 Boron: A Better Energy Carrier than Hydrogen? (27 July 2004)
Boric acid is soluble, and like oxygen can enter the bloodstream through the lungs.
Boron's oxide coat is unusual in that at temperatures between 450±2 Celsius and roughly 2,000 Celsius it is a very viscous liquid coat.
In most metal oxides and in boria the oxidized atoms are farther apart than they were in pure element.
www.eagle.ca /~gcowan/boron_blast.html   (6664 words)

  
 opaque
Dozens of papers were published on this subject, mainly up to the middle of the century, which concentrated on ternary (triaxial) systems of base oxides of lead,calcium, barium and zinc and others with boric oxide and silica.
It is now clear that the alumina content in fritted glazes containing boric oxide is of paramount importance - low alumina = milky glaze and conversely judicious addition of alumina or china clay = clear glaze.
In late fifties the race for the unusual opaque glazes were indeed numbered the supplies of tin oxide peaked and a new opacifier micronised zircon - came on the marked.
members.iinet.net.au /~sujon/ceramicstudygroup/opaque.html   (594 words)

  
 Please Help
They are using Antimony Oxide (linked to cancer, liver, and heart damage) and Boric Acid (a pesticide that is poison to humans, and the EPA links it to sterility, fetal death, and birth defects).
Please see the letter I sent retailers, the whole story, a cutaway photo of how over a pound of Boric Acid is being used in mattresses, retailer and leading doctor quotes on this issue at www.Strobel.com/vote.htm This law is effective Jan 1 in California and is being enacted nationwide by the CPSC.
The CPSC reports Antimony Oxide is not chemically bound and is released from Modacrylic fibers.
www.supplepedic.com /response.htm   (3131 words)

  
 [No title]   (Site not responding. Last check: 2007-10-18)
Borothermic reduction of metal oxides In this method, zirconium oxide is reduced using boron metal powder in furnace under inert atmosphere, represented by the following equation.
In one embodiment of the invention, zirconium chloride and boric acid are milled prior to mixing.
In another embodiment of the invention, the zirconium chloride, boric acid and magnesium used as raw materials are of commercial grade.
www.wipo.int /cgi-pct/guest/getbykey5?KEY=03/82739.031009&ELEMENT_SET=DECL   (1878 words)

  
 Method of fabricating articles (US5507962)
The method includes cutting an oxide ceramic workpiece in a cutting zone and applying a cutting fluid to the cutting zone.
The boron compound is selected from the group consisting of boric acid, alkali metal borates, aluminum borate, and mixtures thereof.
A method of fabricating articles, which includes cutting a workpiece in a cutting zone with an oxide ceramic cutting point and applying a cutting fluid to the cutting zone is also disclosed.
www.delphion.com /details?pn=US05507962__   (296 words)

  
 boric acid on Encyclopedia.com
BORIC ACID [boric acid] any one of the three chemical compounds, orthoboric (or boracic) acid, metaboric acid, and tetraboric (or pyroboric) acid; the term often refers simply to orthoboric acid.
Fiberboards treated with N'-N-(1, 8-Naphthalyl) hydroxylamine (NHA-Na), borax, and boric acid.
Boric Acid Damage Is Unique to FirstEnergy's Oak Harbor, Ohio, Nuclear Plant.
www.encyclopedia.com /html/b1/boricaci.asp   (392 words)

  
 Letters Patent 1700066 - Insulator For Radio Frequency Currents
Boric acid is preferably also present as tending to the complete fusion and as producing non-hydroscopic and chemical stable glass which tends to preserve a smooth surface under weathering
Glass of the general composition above stated also has the advantage that the principal elements in the composition, that is to say, boric oxide and silica, both possess electro-negative characteristics and that the ions of the alkali that are introduced in the preferred composition given are relatively immobile.
In a system carrying radio frequency currents, the combination with a part charged with such currents, of an insu1ator therefor Composed of a homogeneous mixture having a high silica content, and containing boric oxide and a small amount of potash.
www.nia.org /timeline/text/1700066.htm   (648 words)

  
 Boron: A Better Energy Carrier than Hydrogen? (3 October 2003)
Boric acid dissolves in water, so if boron grew a coat of oxide at normal temperatures, water could attack it in two steps, and it would not be as inert as it is.
Viscosity and density data are from "Boron Oxides, Boric Acid, and Borates", Kirk-Othmer Encylopedia of Chemical Technology, 4th edition.
Each particular surface microgust gets laden with oxide vapour, but overall there is an abundant excess of oxygen, because of the boron motor's ability to retain unconsumed oxygen and bring it around again.
www.bpower.ca /commercial.html   (12660 words)

  
 JCE 2002 (79) 1202 [Oct] CLIP: Acetic Anhydride
I do not question that heating a mixture of acetic anhydride and boric acid is a hazardous operation, but I do strongly question whether boric acid is an oxidizing agent of any kind, mild or otherwise.
Acetic anhydride reacted with boric acid to form acetic acid and boric oxide (boric anhydride).
This may be considered a mere quibble, but I have been involved in a situation in which ferric oxide was labeled a strong oxidizer, due to the thermite reaction with aluminum metal.
jchemed.chem.wisc.edu /Journal/Issues/2002/oct/abs1202_1.html   (345 words)

  
 HairSite - Waseda's Regimen - Botanical Based Hair Care & Hair Loss Treatments
correct i use the boric acid and zinc oxide and starch like patent posted by waseda, you may be right on the 1 hr being a bit to long to have it on..
As the zinc amount of zinc oxide is four fifths of the latter, it amounts to 480mg zinc.
Unluckily, zinc oxide is a typical oxide which is less soluble in water and ascorbic acid is a typical acid which is prone to be oxidated in high temperature.
www.hairsite2.com /waseda/summary/zo.htm   (11629 words)

  
 A study of liquid boric oxide particle growth rates in a gas stream from a simulated jet engine combustor   (Site not responding. Last check: 2007-10-18)
A study of liquid boric oxide particle growth rates in a gas stream from a simulated jet engine combustor
It was experimentally determined that the liquid boric oxide particles leaving a jet engine combustor, burning a boron-containing fuel, will have diameters of 1.0 x 10(exp -5) to 2.0 x 10(exp -5) centimeter.
A study of boric oxide deposition mechanisms is included, and suggestions for decreading deposition rates given.
naca.larc.nasa.gov /reports/1957/naca-rm-e55i20a   (132 words)

  
 Materials — Boron Nitride (BN) Properties
BN is stable in inert and reducing atmospheres up to 2800°C, and in oxidizing atmospheres to 850°C. Three grades are commonly used, including a boric oxide binder system, a calcium borate binder system, and a pure diffusion bonded grade.
The boric oxide containing material (Grade BO) absorbs moisture which causes swelling and property degradation.
The boric oxide material is the most commonly used grade.
www.accuratus.com /boron.html   (271 words)

  
 Boric Oxide, Boric Oxide Manufacturers Suppliers Exporters of Boric Oxide
Exporters of sodium bichromate, chrome oxide green, chromic acid flakes, boric acid, borax, sodium penta chloro phenate, sodium benzoate, copper sulphate, benzoic acid, electroplating chemicals, chrome salt and other industrial chemicals.
Exporter & dealer of sodium penta chlro phenate, boric acid, borax, oxalic acid, sodium bichromate, chrome oxide green, chromic acid, flakes,magnesium chloride,sodium benzoate, benzoic acid,electroplating chemicals,and other basic chemicals.
Suppliers of chemicals such as acetone, acetic acid, ammonium chloride, phosphoric acid, hydrozen peroxide, carbon tetra chloride, citric acid, magnesium sulphate, potassium permanganate, zinc oxide, chloroform and caustic sods flakes.
www.indianchemicalportal.com /boric-oxide.html   (464 words)

  
 [No title]   (Site not responding. Last check: 2007-10-18)
An acid derived from boric oxide in the form of white, triclinic crystals, melting at 185°C, soluble in water.
O A fuming liquid hydrolyzed by air immediately; boiling point is 125.7°C; used as a catalyst in reactions involving condensation, dehydration, polymerization, alkylation, and acetylation.
] A salt of boric and silicic acids which occurs in the natural minerals tourmaline, datolite, and dumortierite.
www.accessscience.com /Dictionary/B/B26/DictB26.html   (2531 words)

  
 boric acid
boric acid, any one of the three chemical compounds, orthoboric (or boracic) acid, metaboric acid, and tetraboric (or pyroboric) acid; the term often refers simply to orthoboric acid.
The major uses of the boric acids are in forming other boron compounds and in borate salts, e.g.,
boracic acid - boracic acid: see boric acid.
www.infoplease.com /ce6/sci/A0808367.html   (346 words)

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