Searched for: subject:"alumina"
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Guatame-Garcia, L.A. (author), Buxton, M.W.N. (author)
In response to the growing demand for sustainable products and services, the kaolin calcination industry is developing practices that optimise the use of resources. The main challenges include more efficient use of raw materials and a reduction in the energy consumed by the calcination furnace. An opportunity to achieve this lies in the...
journal article 2020
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Azof, Fabian Imanasa (author), Yang, Y. (author), Panias, Dimitrios (author), Kolbeinsen, Leiv (author), Safarian, Jafar (author)
The leaching characteristics and mechanism of synthetic CaO-Al <sub>2</sub> O <sub>3</sub> slags in alkaline solution at atmospheric pressure have been studied. The purpose of the study is to have a better understanding of the leaching part of the Pedersen process, as an alternative to the Bayer process for alumina production. The...
journal article 2019
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Zhang, Di (author), la Zara, D. (author), Quayle, Michael J. (author), Petersson, Gunilla (author), van Ommen, J.R. (author), Folestad, Staffan (author)
The morphology, size, and surface properties of pharmaceutical particles form an essential role in the therapeutic performance of active pharmaceutical ingredients (APIs) and excipients as constituents in various drug delivery systems and clinical applications. Recent advances in methods for surface modification, however, rely heavily on...
journal article 2019
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Boatemaa, L. (author)
Alumina (Al2O3) is an attractive ceramic for engineering applications operating at elevated or high temperatures because of its good thermal and chemical resistance. It also maintains high strength and hardness at high temperatures. These desirable properties are due to the strong covalent and ionic bonds existing between its atoms.<br/>However,...
doctoral thesis 2018
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Guatame-Garcia, L.A. (author), Buxton, M.W.N. (author), Deon, F. (author), Lievens, Caroline (author), Hecker, Chris (author)
In the production of calcined kaolin, the on-line monitoring of the calcination reaction is becoming more relevant for the generation of optimal products. In this context, this study aimed to assess the suitability of using infrared (IR) spectroscopy as a potential technique for the on-line characterization of the<br/>calcination of kaolin. The...
journal article 2018
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Kwakernaak, C. (author), Sloof, W.G. (author)
A fast and generic scheme is proposed to calculate the work of adhesion between two different materials or the cohesive energy between two crystal planes in a material. These calculations make use of the regular solution theory. This theory is extended to describe chemical interactions between atoms at either side of an interface. The so...
journal article 2018
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Boatemaa, L. (author), van der Zwaag, S. (author), Sloof, W.G. (author)
This work explores the possibility of using embedded micron-sized Ti particles to heal surface cracks in alumina and to unravel the evolution of the crack filling process in case of pure solid-state oxidation reactions. The oxidation kinetics of the Ti particles is studied and the results are applied in a simple model for crack-gap filling....
journal article 2018
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Boatemaa, Linda (author), Bosch, Myrthe (author), Farle, Ann Sophie (author), Bei, G. (author), van der Zwaag, S. (author), Sloof, W.G. (author)
In this work, the oxidation-induced crack healing of Al<sub>2</sub>O<sub>3</sub> containing 20 vol.% of Ti<sub>2</sub>AlC MAX phase inclusions as healing particles was studied. The oxidation kinetics of the Ti<sub>2</sub>AlC particles having an average diameter of about 10 μm was studied via thermogravimetry and/or differential thermal...
journal article 2018
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Valdesueiro, David (author), Hettinga, Hans (author), Drijfhout, Jan Pieter (author), Lips, Priscilla (author), Meesters, G.M.H. (author), Kreutzer, M.T. (author), van Ommen, J.R. (author)
In this work, we report a method to change the surface finish of a standard polyester-based powder coating paint, from gloss to matt, by depositing ultrathin films of Al<sub>2</sub>O<sub>3</sub> on the powder coating particles. The coating experiments were performed in a fluidized bed reactor at 1 bar and 27 °C, using a gas-phase coating...
journal article 2017
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Carabat, A.L. (author), Van der Zwaag, S. (author), Sloof, W.G. (author)
Easy crack propagation in oxide ceramic coatings limits their application in high temperature environment (e.g. such as engines and gas turbine components) [1]. In order to overcome this problem, incorporation of sacrificial particles into an oxide ceramic coating may be a viable option. Particles of silicon compounds, such as: Si3N4, SiC, MoSi2...
conference paper 2013
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Nanko, M. (author), Maruoka, D. (author)
Abstract only.
conference paper 2013
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Carabat, A.L. (author), Van der Zwaag, S. (author), Sloof, W.G. (author)
Easy crack propagation in oxide ceramic coatings limits their application in high temperature environment (e.g. such as engines and gas turbine components) [1]. In order to overcome this problem, incorporation of sacrificial particles into an oxide ceramic coating may be a viable option. Particles of silicon compounds, such as: Si3N4, SiC, MoSi2...
conference paper 2013
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Nijdam, T.J. (author), Sloof, W.G. (author)
The relation between the Y distribution in the alloy and the growth kinetics of the developing oxide scale was studied for the thermal oxidation of two Ni–20Co–19Cr–24Al–0.2Y (at.%) alloys at 1,373 K: (i) a coarse-grain cast alloy with large Ni5Y intermetallic precipitates, and (ii) a fine-grain freestanding coating with small Ni5Y precipitates....
journal article 2007
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Yan, B. (author), Pham, H.T.M. (author), Ma, Y. (author), Zhuang, Y. (author), Sarro, P.M. (author)
The authors demonstrate a method for the fabrication of in situ ultrathin porous anodic aluminum oxide layers (aspect ratio<2:1) on Si, which can be directly used as templates for nanodot preparation and for pattern transfer. The regular shape of the aluminum oxide pores is maintained even when the thickness of the aluminum oxide template is...
journal article 2007
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Nijdam, T.J. (author)
The turbine blades in gas turbine engines need to be protected against high temperature oxidation and corrosion with a coating system. This coating system comprises of a Ni-based superalloy substrate, a NiCoCrAlY bond coating (BC) and an insulating ceramic thermal barrier coating (TBC). Good protection is offered when during service of the...
doctoral thesis 2005
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Stassen, A.F. (author), De Boer, R.W.I. (author), Iosad, N.N. (author), Morpurgo, A.F. (author)
We have performed a comparative study of rubrene single-crystal field-effect transistors fabricated using different materials as gate insulator. For all materials, highly reproducible device characteristics are obtained. The achieved reproducibility permits one to observe that the mobility of the charge carriers systematically decreases with...
journal article 2004
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Dekker, J.P. (author), Van der Put, P.J. (author), Veringa, H.J. (author), Schoonman, J. (author)
journal article 1994
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Butchereit, E. (author), Schreiber, M. (author), Schoonman, J. (author)
journal article 1994
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Rao, N. (author), Srensen, O.T. (author), Van den Bleek, C.M. (author), Schoonman, J. (author)
journal article 1993
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Rao, N. (author), Van den Bleek, C.M. (author), Schoonman, J. (author)
journal article 1992
Searched for: subject:"alumina"
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