Results 181 to 190 of about 3,242 (195)

Nitridation of sepiolite by carbothermal reduction

Journal of Materials Science Letters, 1985
tude de la preparation de ceramiques de Si 3 N 4 par nitruration de sepiolite (argile fibreuse a base de silicate de magnesium)
Yoshiyuki Sugahara, Kazuyuki Kuroda, Chuzo Kato   +2 more
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Equipment for microwave enhanced carbothermic reductions

2009 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC), 2009
In this paper the diversity of industrial microwave applications is highlighted by the description of another exciting field for microwave usage: the microwave carbothermic reduction of metal oxides. This is a metallurgical application for metal production, for example pig iron from hematite.
Luiz Alberto Jermolovicius, Edmilson Renato de Castro, Jose Thomaz Senise, Marcelo Breda Mourao, Cyro Takano   +4 more
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Kinetics of Carbothermic Reduction of Ilmenite

Materials Science Forum, 2016
The reduction kinetics of ilmenite was investigated. Phase evolution during the reduction process was identified by XRD and morphology change was observed using SEM. Kinetic parameters of the activation energy and pre-exponential factor were determined by Kissinger-Akahira-Sunose (KAS) method and Coast-Redfern method&artificial isokinetic ...
Min Chen, Xuan Xiao, Xue Feng Zhang
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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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Mechanically activated carbothermic reduction of ilmenite

Metallurgical and Materials Transactions A, 1997
A systematic study of the effect of milling conditions on the low-temperature carbothermic reduction of the mineral ilmenite has been carried out. It was found that after ball milling of an ilmenite-carbon mixture at room temperature, the ilmenite was reduced to rutile and metallic iron during subsequent low-temperature annealing (760 °C for 30 minutes)
Y. Chen, T. Hwang, M. Marsh, J. S. Williams   +3 more
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Zirconia carbothermal reduction: Non-isothermal kinetics

International Journal of Refractory Metals and Hard Materials, 2009
Abstract The kinetics of carbothermic reduction of zirconia was studied by non-isothermal TGA with heating rate 10 °C min −1 under Argon flowing. The zirconia and reaction products were analyzed by XRD method. The model-fitting kinetic approach has been applied to TGA data. The reaction mechanism for carbothermal reduction of zirconia was determined
Reza Ebrahimi-Kahrizsangi, Ehsan Amini-Kahrizsangi   +1 more
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Carbothermic reduction of mechanically activated celestite

International Journal of Mineral Processing, 2009
Abstract Effects of dry milling on the carbothermic reduction of celestite were examined. Celestite and coke mixture was milled up to 120 h in a planetary ball mill. Unmilled and milled mixtures and their black ashes from carbothermic reduction were characterized by a combination of X-ray diffraction (XRD) analysis, scanning electron microscope ...
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Reaction‐Rate‐Limiting Steps in Carbothermal Reduction Processes

Journal of the American Ceramic Society, 1985
The production of β‐sialon (Si3A1303N5) and nonoxidic powders by carbothermal reduction of oxides is discussed. Special attention is paid to the rate‐determining steps in the conversion process performed in a packed‐bed reactor.
van Dijen, F.K., Metselaar, R., Siskens, C.A.M.   +2 more
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Carbothermal reduction synthesis of TiB2 ultrafine powders

Ceramics International, 2016
Abstract Submicrometric TiB 2 powders were synthesized by carbothermal reduction process using titanium dioxide, boron carbide and carbon black as the starting materials. The influence of different amount of boron carbide (22.0–26.8 wt%), calcination temperature (1400–1900 °C) and holding time (15–90 min) on the composition and microstructure of the
Jincheng Yu, Li Ma, Aumber Abbas, Yujun Zhang, Hongyu Gong, Xianli Wang, Liwei Zhou, Hening Liu   +7 more
openaire   +1 more source