Results 21 to 30 of about 18,650 (253)

First-principles study of dehydration interfaces between diaspore and corundum, gibbsite and boehmite, and boehmite and γ-Al2O3: Energetic stability, interface charge effects, and dehydration defects

Applications of Surface Science, 2020
Aluminum hydrate dehydration interfaces were studied using a van der Waals density functional. The interface configurations investigated here as a first exploration of possible interface geometries, were all found to have a reasonable probability of ...
H. Gog
semanticscholar   +1 more source

Solid-state NMR characterisation of the thermal transformation of a Hungarian white illite [PDF]

, 2005
1H, 27Al, 29Si and 39K solid-state NMR are reported from a Hungarian illite 2:1 clay for samples heated up 1600 °C. This single-phase sample has a small amount of aluminium substitution in the silica layer and very low iron-content (0.4 wt%).
Ban, Bastow, Brindley, Brindley, Brown, Brown, D.L. Carroll, Deer, Drachman, Drits, Earnest, Engelhardt, Fitzgerald, Fitzgerald, Freude, Grim, Grim, Hayashi, He, Herrero, Jaymes, Jaymes, Kunath-Fandrei, Kunath-Fandrei, Kunwar, Lambert, Lambert, Lausen, M.E. Smith, MacKenzie, Mackenzie, Mackenzie, Massiot, Massiot, McConville, Merwin, Michael, Murad, Rehak, Roch, Rocha, Rocha, Sanchez-Soto, Sanz, Sanz, Schairer, Schroeder, Slade, Smith, Smith, Smith, Smith, T.F. Kemp, T.J. Bastow, Watanabe, Woessner, Worrall   +56 more
core   +1 more source

Low-Waste Synthesis and Properties of Highly Dispersed NiO·Al₂O₃ Mixed Oxides Based on the Products of Centrifugal Thermal Activation of Gibbsite

ChemEngineering, 2023
This study revealed an increased reactivity of centrifugally thermoactivated products of gibbsite toward aqueous solutions of nickel nitrate at room temperature as well as under hydrothermal conditions. X-ray, thermal, microscopy, adsorption and chemical
Aleksey V. Zhuzhgov, Lyubov A. Isupova, Evgeny A. Suprun, Aleksandr S. Gorkusha   +3 more
doaj   +1 more source

Granulometric Separation of Bauxite Tailings to Metallurgical Processing [PDF]

Materials Research
The beneficiation of bauxite ore generates significant quantities of tailings, primarily composed of kaolinite and residual gibbsite, the latter still amenable to metallurgical recovery.
Elaine Cristina Lima de Melo, Oscar Jesus Choque Fernandez, Murilo Ponciano Emim, Bruno Apolo Miranda Figueira, Nayara Aparecida Fonseca Couto   +4 more
doaj   +1 more source

Synchrotron Radiation Pair Distribution Function Analysis of Gels in Cements [PDF]

, 2017
The analysis of atomic ordering in a nanocrystalline phase with small particle sizes, below 5 nm, is intrinsically complicated because of the lack of long-range order.
Cuesta-Garcia, Ana Maria, García-Aranda, Miguel Ángel, Gomez-de-la-Torre, Maria de los Angeles, Londono-Zuluaga, Diana, Santacruz-Cruz, Maria Isabel, Vallcorba, Oriol, Zea-Garcia, Jesus D.   +6 more
core   +4 more sources

Relationship between macrofauna, mineralogy and exchangeable calcium and magnesium in Cerrado Oxisols under pasture Relações entre macrofauna, mineralogia, cálcio e magnésio trocáveis em Latossolos do Cerrado sob pastagem

Pesquisa Agropecuária Brasileira, 2009
The objective of this work was to assess the relationship between macrofauna, mineralogy and exchangeable calcium and magnesium in Cerrado Oxisols under pasture.
Pedro Rodolfo Siqueira Vendrame, Robélio Leandro Marchão, Osmar Rodrigues Brito, Maria de Fátima Guimarães, Thierry Becquer   +4 more
doaj   +1 more source

Soil Chemistry and Clay Mineralogy of an Alluvial Chronosequence from the North Carolina Sandhills of the Upper Coastal Plain, USA

Soil Systems, 2021
Temporal changes in soil development were assessed on fluvial terraces of the Little River in the upper Coastal Plain of North Carolina. We examined five profiles from each of six surfaces spanning about 100,000 years.
Bradley E. Suther, David S. Leigh, Larry T. West   +2 more
doaj   +1 more source

Decomposition of Bayer process organics: Phenolates, polyalcohols, and additional carboxylates [PDF]

, 2011
The degradation of nineteen low-molecular-weight phenolates, polyalcohols and selected aliphatic and aromatic carboxylates of relevance to the Bayer process has been studied in 6 mol kg-1 NaOH(aq) at 90 °C for up to 36 days, and (for some species) at 180
Hefter, G.T., Laird, D.W., Machold, T., May, P.M., Rowen, C.C.   +4 more
core   +2 more sources

Surface Hydration and Hydroxyl Configurations of Gibbsite and Boehmite Nanoplates

Journal of Physical Chemistry C, 2020
The discontinuation of the bulk structure at the interface between metal oxide particles and water leads to altered bonding characteristics and unique facet-dependent molecular environments.
M. Sassi, Zhemin Wang, E. Walter, Xin Zhang, Hailin Zhang, Xiaohong Li, Aashish Tuladhar, M. Bowden, Hong-fei Wang, S. Clark, K. Rosso   +10 more
semanticscholar   +1 more source

Incipient ferralization and weathering indices along a soil chronosequence in Taiwan [PDF]

, 2016
The low hilly topography of Green Island, a volcanic island off southeastern Taiwan, includes an altitudinal sequence of sub-horizontal benches. We examined eight profiles along this sequence, ranging from pale brown loamy coral sand on the lowest bench ...
Baillie, Ian C., Chen, Y. Y., Chiu, C. Y., Huang, W. S., Jien, S. H.   +4 more
core   +1 more source