Results 171 to 180 of about 5,084 (220)
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Autoprecipitation of Gibbsite and Boehmite
2016When thick bauxite slurry was heated up to 160°C, boehmite precipitation was observed and caused scale formation on the surface of heat exchangers in digestion step.
T. Harato, T. Ishida, K. Yamada
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Clays and Clay Minerals, 2000
Abstract The persistence of many seemingly metastable mineral assemblages in sediments and soils is commonly attributed to their sluggish transformation to the stable-phase assemblage. Although undoubtedly kinetics plays a major role, this study shows that thermodynamic factors, particularly surface energy ...
Juraj Majzlan +2 more
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Abstract The persistence of many seemingly metastable mineral assemblages in sediments and soils is commonly attributed to their sluggish transformation to the stable-phase assemblage. Although undoubtedly kinetics plays a major role, this study shows that thermodynamic factors, particularly surface energy ...
Juraj Majzlan +2 more
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Vacuum dehydration of boehmite
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science, 19591. The vacuum dehydration of boehmite at low temperatures gives homogeneously porous preparations of high specific surface (about 300 sq. m/g and higher) with preservation of the crystal structure. 2. The specific surfaces of vacuum-dehydration products are independent of temperature in the range 20–420°.
Yu. A. �l'tekov +2 more
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A Kinetic Study of Phosphate Adsorption by Boehmite
Journal of Pharmaceutical Sciences, 1997Rates of phosphate adsorption to PT-A (a new type of aluminium oxide hydroxide) and ALG (aluminum hydroxide gel) from a pH 3 phosphate solution were measured by a batch method. Phosphate uptake progressed mainly by the adsorption mechanism for PT-A, but dissolution of aluminum and precipitation of aluminum phosphate took place in addition to phosphate ...
W P, Tang, O, Shima, A, Ookubo, K, Ooi
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Pressure-induced stacking disorder in boehmite
Physical Chemistry Chemical Physics, 2018The structure of an aluminum layered hydroxide, boehmite (γ-AlOOH), as a function of pressure was studied by using in situ synchrotron X-ray and neutron diffraction.
Y. Ishii +6 more
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Properties of boehmite (γ-AlOOH) and Eu3+-doped boehmite synthesized by hydrothermal method
Optik, 2018Abstract Boehmite nanoplates and Eu 3+ -doped boehmite nanoplates were synthesized by a facile hydrothermal reaction. And the boehmite nanoparticles behave as plate-like in morphology and have a small size about 59 nm. Those nanoplates could be effectively excited by near-UV light in the range of 360 nm to 420 nm.
Lu Yixuan +5 more
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Properties of the boehmitized aluminium surface
Surface Technology, 1982Abstract The system boehmitized aluminium-aqueous solution was investigated over a broad pH range by contact angle and ζ potential measurements. Both measurements gave significant results. The contact angle as a function of pH shows a pronounced maximum, while the ζ potential is a linear function of pH.
V. Vujičić, B. Lovreček
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Hydrothermal preparation and characterization of boehmites
Materials Letters, 2000Boehmites (Al2O3·xH2O ...
D. Mishra +3 more
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The Crystal Structure of Synthetic Boehmite
The Journal of Chemical Physics, 1946Crystal structure computations have been made for synthetic boehmite, the α-modification of aluminum oxide monohydrate, using the powder method. The experimental data were found to fit an orthorhombic lattice with constants a0 = 2.859A, b0 = 12.24A, and c0 = 3.691A.
Paul P. Reichertz, W. Jacque Yost
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Metallurgical and Materials Transactions B, 2011
This article focuses on the mechanically induced reactivity of boehmite prepared by thermal decomposition of gibbsite. Boehmite, which retained the morphology of gibbsite, was characterized by a specific surface area of 264 m2/g. Mechanical activation (MA) was carried out in a planetary mill up to 240 minutes. The samples were characterized in terms of
T. C. Alex +5 more
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This article focuses on the mechanically induced reactivity of boehmite prepared by thermal decomposition of gibbsite. Boehmite, which retained the morphology of gibbsite, was characterized by a specific surface area of 264 m2/g. Mechanical activation (MA) was carried out in a planetary mill up to 240 minutes. The samples were characterized in terms of
T. C. Alex +5 more
openaire +1 more source