Results 181 to 190 of about 2,147 (208)
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Mechanism of sodium adsorption on metakaolinite surfaces: MD investigation
Colloids and Surfaces A: Physicochemical and Engineering AspectsXueying Liu +4 more
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Synthesis of zeolite Na-A from metakaolinite revisited
Journal of the Chemical Society, Faraday Transactions, 199129 Si and 27Al NMR, XRD, IR, SEM and EDAX have been used to examine the synthesis of zeolite Na-A from metakaolinite. When metakaolinite is treated with 5 mol dm–3 NaOH, five- and six-coordinated Al in the aluminous matrix is rapidly converted into four-coordination.
Jo�o Rocha +2 more
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Polyacrylamide/metakaolinite nanocomposites by in-situ intercalative polymerization
Particulate Science and Technology, 2015ABSTRACTA series of polyacrylamide (PAM) organoclay nanocomposites were synthesized by in-situ intercalative polymerization using acrylic amide, sodium hydrogen sulfite, and ammonium peroxydisulfate in the presence of various contents of metakaolinite (MK) modified with potassium acetate (KAc).
Tao Xu, Mei-Ting Liao, Wei Han
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Effect of Metakaolinite on Properties of Alkali Activated Slag Materials
Key Engineering Materials, 2018Metakaolinite was introduced to alkali activated slag mortars and pastes. Properties of fresh and hardened mortars as well as phase composition and microstructure of hardened pastes were investigated. Introduction of metakaolinite both as addition as well as substitution of slag results in severe decrease in strength of the mortars.
Łukasz Kotwica +6 more
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The Effect of Anionic Sorption on the Metakaolinite
Materials Science Forum, 2010This paper reports an investigation on the effect of thermal activation of kaolinite. It is well known that during calcinations (400–650°C), kaolinite loses the OH lattice water and is transformed into metakaolinite or amorphous material. Arsenic is trace element that is toxic to animals including humans.
Valquiria Campos +4 more
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Reaction of metakaolinite with phosgene and carbon tetrachloride
Reactivity of Solids, 1987Abstract The chlorination and chloride volatilization process of a calcined disordered kaolin with phosgene and carbon tetrachloride was studied in the temperature range 300–1100 K mostly by thermogravimetry. The effects of heat treatment, temperature and time of the reaction and also morphological changes were investigated. Preferential chlorination
Zs. Roder, I. Bertóti, T. Székely
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High-resolution TEM studies of mullite formation in metakaolinite
Proceedings, annual meeting, Electron Microscopy Society of America, 1986Studies on the compressive fracture strength (759 MPa at 15000°C) and the flexural strength (700MPaat 1300°C) of polycrystalline mullite (3Al2O3•2SiO2-2Al2O3•SiO2) illustrate its potential for high temperature applications. In the processing of these high strength mullites, molecularly mixed Al2O3-SiO2 precursors are used to enhance mullite formation ...
Mehmet Sarikaya, IInan A. Aksay
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The Characteristics of Metakaolinite-Based Geopolymer at Different Temperature
Applied Mechanics and Materials, 2013Geopolymer is an inorganic cementing material with three-dimensional network structure, which is synthesized from alumino-silicate minerals or solid wastes and alkali-activated agent. But the previous reported that it is not fit for fire-resistant materials and thermal insulation materials.
Jie Yu Chen +3 more
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Crystallization Studies of Preheated Metakaolinite
2013It is well-known that metakaolinite forms mullite and β-cristobalite at high temperatures. The alumina component of metakaolinite never crystallizes into corundum during heating. But corundum forms in a kaolinite if it contains alumina minerals as associated phase.
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Festkörper‐NMR‐Untersuchungen zur Struktur und Reaktivität von Metakaolinit
Angewandte Chemie, 1990Unterschiedlich umgebene Si‐Atome sowie vier‐, fünf‐ und sechsfach koordinierte Al‐Atome, deren Verhältnis von der Calcinierungstemperatur abhängt, liegen nach hochaufgelösten Festkörper‐NMR‐Spektren in Metakaolinit vor. Die Untersuchungen zeigten, daß die höchste Reaktivität von Metakaolinit (Calcinierungstemperatur 480–500°C) mit einem Minimum in der
João Rocha, Jacek Klinowski
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