Last edited by Faugal
Tuesday, October 20, 2020 | History

1 edition of Preparation of high-purity boron found in the catalog.

Preparation of high-purity boron

Preparation of high-purity boron

  • 270 Want to read
  • 32 Currently reading

Published by Rand Corp. in Santa Monica, Calif .
Written in English

    Subjects:
  • Boron.

  • Edition Notes

    Statement[by] C. F. Powell [and others]
    ContributionsPowell, Cecil Frank.
    Classifications
    LC ClassificationsQ180.A1 R36 no. 398, QD181.B1 R36 no. 398
    The Physical Object
    Pagination26 l.
    Number of Pages26
    ID Numbers
    Open LibraryOL5111873M
    LC Control Number74184457

    THE PREPARATION OF THIN SELF SUPPORTING BORON FILMS shown diagrammatically in fig. I, is mounted on an Edwards High Vacuum 6" oil diffusion pump, suitably trapped and backed with a NGN, PSR 12 rotary pump, giving an ultimate vacuuln better diameter enabled a geometry to be obtained which produced a suitable voltage-current setting at the   1. Introduction. Di-boron trioxide (B 2 O 3) is used as a network former in optical fiber, where stringent purity levels with particular reference to transition metal impurities, which act as trap centers are required. Further, highly pure grade B 2 O 3 is required in the electronics industry as a liquid encapsulent for the Czochralski type growth of group iii–v semiconductor ://

    Amorphous boron is attractive material with applications in fuel additives [1, 2], dopant in solar cell [3, 4], and boron neutron capture therapy [5, 6]. In particular, amorphous boron is a very interesting material as a fuel additive because it has high mass and volume specific combustion energy [7, 8].   Grosso, G., Moon, H., Lienhard, B. et al. Tunable and high-purity room temperature single-photon emission from atomic defects in hexagonal boron

      @article{osti_, title = {THE PREPARATION OF HIGH-PURITY BERYLLIUM OXIDE THROUGH THE ACETYLACETONE- EDTA SOLVENT EXTRACTION PROCESS}, author = {Moore, R E and Shaffer, J H and McDuffie, H F}, abstractNote = {A solvent extraction process was devised and used successfully in the preparation of high-purity BeO. A smallscale production operation was ://   The infrared spectra of high‐purity amorphous boron films showed no absorption peaks in the 2–15‐μ region. It is shown that the major peaks previously reported may be attributed to oxide, hydroxide, or carbon ://


Share this book
You might also like
Gems from Catholic Poets

Gems from Catholic Poets

Strength of metals and alloys

Strength of metals and alloys

The glory of their times

The glory of their times

Birmingham gold and silver 1773-1973

Birmingham gold and silver 1773-1973

Electrically propelled spacecraft and associated subjects.

Electrically propelled spacecraft and associated subjects.

Wild flowers of the United States

Wild flowers of the United States

Numerical analysis of elastic plates and shallow shells by an integral equation method

Numerical analysis of elastic plates and shallow shells by an integral equation method

Outline of American literature

Outline of American literature

The RONA guide to the world of naïve art.

The RONA guide to the world of naïve art.

circular to sea captains and other seafaring men.

circular to sea captains and other seafaring men.

CELF Preschool 2

CELF Preschool 2

Handbook of congenital malformations.

Handbook of congenital malformations.

No need for words

No need for words

Treating and overcoming anorexia nervosa

Treating and overcoming anorexia nervosa

symbolic meaning of the story of King Arthur.

symbolic meaning of the story of King Arthur.

Partial Revision of the Indigenous and Tribal Populations Convention 1957, No 107 (Report, 76th Session, 4, 2b)

Partial Revision of the Indigenous and Tribal Populations Convention 1957, No 107 (Report, 76th Session, 4, 2b)

Preparation of high-purity boron Download PDF EPUB FB2

Preparation of High Purity Boron by Molten Salt Electroextraction Abstract Molten salt electroextraction (refining) process was conducted to prepare elemental boron using the electrolyte KCl-KBF 4-KF and boron carbide (B 4 C) as soluble anode.

The reactor and Amorphous boron powder of high purity ( %) with a particle size of l-2 mm is preferred as a fuel for fuel-rich propellants for integrated rocket ramjets and for igniter ://   Facile preparation of boron phosphide particles with high purity and high structural stability Menglei Feng 1, Jinbo Zhang 2,3, Hongpeng Zhou 1, Pengfei Jiang 1, Dingke Zhang 4, Lin Wang 2 and Shijian Chen 1,5   This invention relates to high purity boron pellets, useful as dopants in the manufacture of single crystal, low resistivity, silicon ingots.

Such ingots are starting materials for preparation of semiconductor devices. This invention also relates to a process for producing high purity boron in free-flowing, bead-like Deposition rates up to 9 g/hr, with better than 90% recovery of boron from the tribromide, were obtained.

Under optimum conditions, the impurity levels in parts per million in the product were as follows: oxy nitro sul silicon less thancarbon The invention provides a method for the preparation of an upgraded high-purity powder of hexagonal boron nitride still having low crystallinity to retain activity for sintering.

The first method comprises the steps of admixing a crude powder of hexagonal boron nitride with a carbonaceous material and heating the blend in a stream of an inert :// The method is suitable for preparing carbide and boride with high melting point of boron compounds, such as boron carbide, boron nitride, zirconium diboride, titanium diboride, the purity of the product will be based on raw materials and process to adjust, under certain conditions, can make the product purity Facile Preparation of Boron Phosphide Particles with High Purity and High Structural Stability Menglei Feng1, Jinbo Zhang2,3, Hongpeng Zhou1, Pengfei Jiang1, Dingke Zhang4,Lin Wang2 and Shijian Chen1.

School of Physics, Chongqing University,China. Center for High Pressure Science and Technology Advanced Research, Shanghai Boric acid is often added into coolant as neutron capture agent for pressurized water reactor, whose amount is influenced by its abundance and purity.

Therefore, the preparation of enriched 10 B boric acid with high purity is beneficial to nuclear industry. 10 B is also used in developing tumor-specific boronated drugs in boron neutron capture The residual rich SiO2 slag was obtained for magnesium was leached from the boron mud by sulfuric acid.

The SiO2 was leached from the residual slag by sodium hydroxide solution. The effect of the leaching temperature and the leaching time, the ratio of the sodium hydroxide solution to slag and the concentration of the sodium hydroxide solution on the leaching efficiency of SiO2 in the residual A summary of the work on the preparation of high-purity boron by the hot-wire reduction of boron tribromine.

This report is part of the RAND Corporation research memorandum series. The Research Memorandum was a product of the RAND Corporation from to that represented working papers meant to report current results of RAND research to A method for the determination of ultratrace amounts of boron in high-purity tantalum materials [tantalum metal, tantalum(V) oxide, tantalum pentachloride and tantalum pentaethoxide] is -line anion-exchange matrix separation combined with inductively coupled plasma mass spectrometry (ICP-MS) was employed for the determination of boron at the ng g −1 ://   β-Rhombohedral Boron: At the Crossroads of the Chemistry of Boron and the Physics of Frustration.

Chemical Reviews(5), DOI: /://   Ammonia borane (AB) is emerging as a promising solid hydrogen carrier, particularly for power generation in portable devices that employ proton-exchange membrane fuel cells.

A preparative-scale synthesis of AB from sodium borohydride and ammonium salts in high yields (≥95%) and very high purity (≥98%) has been described.

The first systematic study of a transitional metal-catalyzed The Preparation of High Purity Silicon Dioxide from Boron Mud - The Solid Wastes of Boromagnesite for Producing Borax by Alkali or Soda Article May with 10 Reads How we measure 'reads' Abstract.

For many years, most physico-chemical studies of boron and its compounds were made with elemental boron which was of low purity and usually amorphous or at least very poorly ://   the Sanskrit word for borax.

The element boron was not discovered until when Humphry Davy (), Joseph-Louis Gay-Lussac () and Louis-Jacques Thénard () prepared it independently by reducing boron trioxide with potassium and by electrolysis of moistened boric acid. The purity of their products was about 50%. 12(4) pdf.

A solvent extraction process was devised and used successfully in the preparation of high-purity BeO. A smallscale production operation was demonstrated. The process consists of extracting a solution of beryllium acetylacetonate in CCl/sub 4/ with an aqueous solution containing :// Enhancement of the production yield of boron nitride nanotubes (BNNTs) with high purity was achieved using an amorphous boron-based precursor and a nozzle-type reactor.

Use of a mixture of amorphous boron and Fe decreases the milling time for the preparation of the precursor for BNNTs synthesis, as well as the Fe impurity contained in the B/Fe interdiffused precursor nanoparticles by using a The Preparation of High-Purity Boron by Hot-Wire Techniques.

Pages Simple Rhombohedral Boron—Preparation and Properties. *immediately available upon purchase as print book shipments may be delayed due to the COVID crisis.

ebook access is temporary and does not include ownership of the ebook. Only valid for books with an ebook  › Chemistry › Inorganic Chemistry.

Preparation of high-purity nickel (OCoLC) Material Type: Government publication, National government publication: Document Type: Book: All Authors / Contributors: Karl K Kershner; F W Hoertel; J C Stahl; United States.

Bureau of Mines,The invention relates to a method for producing high-purity triisopropyl borate through system external circulation reaction dehydration. The method comprises the following steps: 1, adding boric acid and isopropanol according to the mole ratio ofas well as isopropanol and solvent according to the volume ratio of ()-() into a reaction kettle; and adding phosphorus pentoxide, two - A professional high purity boron nanoparticle manufacturer and factory,offer high quality high purity boron nanoparticle with competitive price!

[email protected]://