Results 171 to 180 of about 3,128,811 (214)

Carbothermic Reduction of Anatase and Rutile.

ChemInform, 2005
AbstractFor Abstract see ChemInform Abstract in Full Text.
Setoudeh, N., Saidi, A., Welham, N.J.
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Carbothermal reduction of sillimanite

Journal of Materials Chemistry, 1996
Preliminary studies on the carbothermal reduction of sillimanite (Al2O3SiO2) powders are reported. The effects of various reaction parameters, e.g. reaction temperature (1550–1700 °C), C: Si molar ratio (4.5–9.0) in the reactant mixtures, the nature and source of carbon (carbon black or activated charcoal) and the reaction atmosphere (argon or nitrogen
Prasanta K. Panda, Loganathan Mariappan, Vellore A. Jaleel, Thandali S. Kannan, Jean Dubois, Gilbert Fantozzi   +5 more
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Carbothermal reduction of kaolinite under nitrogen atmosphere

Ceramics International, 2000
Preliminary studies on the carbothermal reduction of kaolinite (A1203.2SiO2.2H20) in a static nitrogen gas pressure of 0.15 MPa are reported. The effect of various reaction parameters, e.g.
P K Panda
exaly   +1 more source

Carbothermal reduction and nitriding of TiO2

Journal of the European Ceramic Society, 1989
Abstract Reduction of finely dispersed TiO 2 by carbon in nitrogen flow begins at approximately 1000°C. In the initial stages up to approximatel 1170°C reduction of TiO 2 into lower titanium oxides takes place. Ti 4 O 7 was identified as one of the intermediates. Significant nitriding begins above 1200°C.
T. Ličko, V. Figusch, J. Púchyová
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Enrichment of kyanite by carbothermal reduction

Refractories and Industrial Ceramics, 2010
Thermodynamic analysis is provided for possible reactions. A carbothermal reduction scheme is developed for kyanite in a pseudoclosed system. Adependence is given for the yield of Al2O3 on the amount of reduction. A product is obtained that may be used for producing mullite-corundum refractories (GOST 24704).
N. N. Grishin, O. A. Belogurova, A. G. Ivanova   +2 more
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Carbothermic reduction of refractory metals

Journal of Vacuum Science and Technology, 1976
The reduction of stable refractory metal oxides by carbon is generally unacceptable since the product is usually contaminated with carbides. The carbide formation may be avoided by selecting a solvent metal to dissolve the reactive metal as it is produced and reduce its chemical activity below that required for carbide formation. This approach has been
R. N. Anderson, N. A. D. Parlee
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Alumina purification by carbothermal reduction

Journal of Materials Chemistry, 1996
Sodium, silicon, iron, calcium and gallium as impurities in alumina were removed by carbothermal reduction from alumina particles between 1100 and 1400 °C. Reduction of calcium and silicon oxides starts as low as 1200 and 1100 °C, respectively. Thermodynamics and rate of the alumina cleaning process are discussed.
Dulcina P. F. de Souza, Milton F. de Souza   +1 more
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Carbothermal Reduction of Silica

1977
Silicon carbide, silicon nitride or silicon monoxide may be produced by carbothermal reduction of silica depending on conditions. The mechanism for the reduction of silica involves a chain reaction, gas-solid scheme. Both silica and carbon surfaces are involved. An explanation for the role of iron as a catalyst is given.
J. G. Lee, P. D. Miller, I. B. Cutler
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Carbothermal reduction of zinc ferrite

Metallurgical and Materials Transactions B, 2001
The carbothermal reduction of zinc ferrite was studied using X-ray diffractometer (XRD), wet chemical analysis, scanning electron microscope (SEM), surface area meter, and thermogravimetrical analysis (TGA) systems. Zinc ferrite was found to be decomposed to ZnO and Fe2O3 initially and carbothermal reduction of ZnO and Fe2O3 took place simultaneously ...
Jyh-Jen Lee, Chun-I Lin, Hsi-Kuei Chen
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