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Topic: Boehmite


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In the News (Thu 12 Nov 09)

  
  Title page for ETD etd-10032003-114015
Phosphate was sorbed in single-mineral aqueous suspensions of ferrihydrite (ferric hydroxide), boehmite (aluminum oxyhydroxide), goethite (iron oxyhydroxide), or non-crystalline (non-xl) Al-hydroxide, and mixtures of ferrihydrite/boehmite, goethite/boehmite, and ferrihydrite/non-xl Al-hydroxide at pH 6.
Phosphorus K-XANES spectra for phosphate on Fe- vs. Al-oxide minerals differed in that a weak doublet peak was observed for Fe-oxides on the low-energy side of the P K-edge, i.e., in the pre-edge region.
The quantitative distribution of phosphate between ferrihydrite and boehmite in mixtures of these minerals was determined using linear combination fitting (LCF) analysis of the XANES pre-edge region.
www.lib.ncsu.edu /theses/available/etd-10032003-114015   (473 words)

  
 Boehmite
Thermochemical properties of gibbsite, bayerite, boehmite, diaspore, and the aluminate ion between 0 and 350p0sC (SuDoc Y 3.N 88:25/5271)
Hydrothermal precipitation of boehmite from aluminum chloride solutions ([Open-file report] / United States Department of the Interior, Bureau of Mines)
Thermochemical properties of gibbsite, bayerite, boehmite, diaspore, and the aluminate ion between 0 and 350°C
www.veryhappening.com /things/boehmite   (115 words)

  
 XANES Determination of Adsorbed Phosphate Distribution between Ferrihydrite and Boehmite in Mixtures -- Khare et al. 68 ...
Adsorption isotherms for PO on boehmite, ferrihydrite, and mixed boehmite/ferrihydrite (1:1 mass basis) at pH 6.0 ± 0.1, along with Freundlich isotherm models as solid lines for the June 2002 data.
The pre-edge region of XANES spectra for PO adsorbed on boehmite
Pre-edge region in edge-normalized P K-XANES spectra for PO adsorbed on ferrihydrite (ferri.—June 2002 and October 2002 data) or boehmite at various concentrations at pH 6.0 ± 0.1 along with averaged standards for PO adsorbed on each mineral.
soil.scijournals.org /cgi/content/full/68/2/460   (5284 words)

  
 Alan Guisewite's Mineral Collection Images: Miscellaneous Systematic Oxides Page
A micromount of tan boehmite (or böhmite, aluminum hydroxyoxide) on white natrolite from the Saga Quarry, Strandåsen, Porsgrunn,Telemark, Norway.
Diaspore is one of the three aluminum (hydr)oxides (with boehmite and gibbsite) referred to as bauxite.
Gibbsite is a polymorph with bayerite, doyleite, and nordstrandite and comprises, along with boehmite and diaspore, the aluminum ore bauxite.
www-2.cs.cmu.edu /~adg/adg-psoimages.html   (6356 words)

  
 Organic Derivatives of Layered Inorganics Having the Second Stage Structure   (Site not responding. Last check: 2007-10-12)
) in glycol at elevated temperatures yielded the glycol derivative of boehmite together with a small amount of well-crystallized boehmite and a residue of unreacted gibbsite.
The addition of water to the medium increased the reactivity of gibbsite and yielded a novel phase having a large basal spacing.
XRD analysis showed that the products had the boehmite layer structure and that the difference between the basal spacings of the present products and those of the corresponding glycol derivatives of boehmite obtained in pure glycols was about the same as the thickness of a boehmite layer.
pubs.acs.org /cgi-bin/abstract.cgi/cmatex/1997/9/i07/abs/cm970018h.html   (251 words)

  
 Böhmite: Böhmite mineral information and data.   (Site not responding. Last check: 2007-10-12)
Kiss, A. B., Keresztury, G., and Farkas, L. (1980): Raman and IR spectra and structure of boehmite (γ-AlOOH).
Larsen, A. (1981): Boehmite from syenite pegmatites in the Oslo region, Norway.
Hill, R. (1981): Hydrogen atoms in boehmite: a single crystal X-ray diffraction and molecular orbital study.
www.mindat.org /min-707.html   (891 words)

  
 Boehmite Alumina Powder from READE
boehmite alumina, colloidal boehmite, sols, boehmite dispersions, nano-sized boehmite, dispersible boehmite, aluminum oxide, boehmite alumina, colloidal boehmite, sols, boehmite dispersions, nano-sized boehmite, dispersible boehmite, aluminum oxide
Boehmite alumina, colloidal boehmite, sols, boehmite dispersions, nano-sized boehmite, dispersible boehmite, aluminum oxide
boehmite alumina, colloidal boehmite, sols, boehmite dispersions, nano-sized boehmite, dispersible boehmite, aluminum oxide, boehmite alumina, colloidal boehmite, sols, boehmite dispersions, nano-sized boehmite, dispersible boehmite, aluminum oxide, boehmite alumina, colloidal boehmite, sols, boehmite dispersions, nano-sized boehmite, dispersible boehmite, aluminum oxide
www.reade.com /Products/Oxides/boehmite_alumina.html   (167 words)

  
 Sasol North America Alumina Group Home Page @ www.SasolTechData.com
PURAL® and CATAPAL® are the respective trade names for the high purity boehmite aluminas produced in Germany and in the USA.
DISPERAL® and DISPAL® are the trade names for the high purity, highly dispersible, colloidal boehmite alumina powders manufactured by Sasol in Germany and the USA, respectively.
These aluminas, which are sub micron sized in the dispersed phase, exhibit a unique combination of purity, consistency, and dispersibility that make them excellent materials for use in demanding colloidal applications.
www.sasoltechdata.com /alumina_group.asp   (792 words)

  
 COLL 183 - Dye adsorption on cationically modified colloidal boehmite from aqueous solution   (Site not responding. Last check: 2007-10-12)
Adsorption behavior of indicator molecules on cationically modified colloidal boehmite from aqueous solution was compared to indicator adsorption on naturally cationic, unmodified colloidal boehmite.
Three types of anionic dyes commonly used in printing inks were used as indicators; C.I. Acid Blue 9, Acid Red 37, and Direct Yellow 50.
Waterfastness testing on coated paper indicates cationic modification of pigments used in ink receiver formulations is an effective way to improve waterfastness of images printed with anionic dye colorants.
membership.acs.org /c/coll/neworleans/P614891.HTM   (178 words)

  
 SURFACE ENTHALPY OF BOEHMITE -- Majzlan et al. 48 (6): 699 -- Clays and Clay Minerals
SURFACE ENTHALPY OF BOEHMITE -- Majzlan et al.
favoring the crystallization of boehmite or gibbsite from aqueous
databases, we confirm that bulk boehmite is metastable with
ccm.geoscienceworld.org /cgi/content/abstract/48/6/699   (296 words)

  
 Polymorf - Knowhwere- Boehmite   (Site not responding. Last check: 2007-10-12)
The boehmite structure consists of layers of FCC close packed O and OH ions with
structure except in the boehmite layer the occupied AX
The FCC crystal lattice model demonstrates that two rows of adjacent AX groups
www.polymorf.net /matter32.htm   (211 words)

  
 resume   (Site not responding. Last check: 2007-10-12)
Developed a procedure to coat boehmite layer on SiC particles via a sol-gel technique, and modified the procedure to work on various core ceramic particles.
Studied the rheological and consolidation behaviors of coated ceramic particle suspensions to analyze the contact interaction between particles.
C.-Y. Yang and W.-H. Shih, “Effects of Acid on the Coating of Boehmite onto Silicon Carbide Particles in Aqueous Suspensions”, J. Am.
www.pages.drexel.edu /~sg95793c/resume.html   (659 words)

  
 Reade Advanced Materials Boehmite Alumina Powder (Al2O3)
Key Words: Al2O3, boehmite alumina, colloidal boehmite, sols, boehmite dispersions, nano-sized boehmite, dispersible boehmite, aluminum oxide
Most bauxite is refined by the Bayer process to remove impurities and produce a nominal 99.5% Al2O3 product.
Four types of alumina are generally utilized: calcined, tabular, hydrated, and synthetic boehmite.
www.matweb.com /search/SpecificMaterialText.asp?bassnum=CREADE002   (230 words)

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