Results 201 to 210 of about 6,681 (230)

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
openaire   +1 more source

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 ...
openaire   +1 more source

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

Plasma Carbothermic Reduction of Rare-Earth Metals

Russian Metallurgy (Metally), 2018
The results of the manufacture of high-purity scandium and critical analysis of the existing technology of rare-earth metals (REMs) are reported. Carbothermic and distillation technologies and equipment for manufacturing REMs are considered. An optimizing calculation of electric-furnace condensers is reported.
V. S. Cherednichenko, A. S. An’shakov, V. A. Serikov, V. A. Faleev   +3 more
openaire   +1 more source

Porous AlN Ceramics Fabricated by Carbothermal Reduction

Materials Science Forum, 2014
A new method for preparing porous AlN ceramics with high porosity had been developed by carbothermal reduction of die-pressed green bodies composed of alumina, carbon, sintering additives and AlN seeds. The influences of sintering additives and sintering temperature on the microstructure and mechanical properties of porous AlN ceramics were ...
Yuan Lu, Jing Long Li, Jian Feng Yang, Peng Li   +3 more
openaire   +1 more source

Silicon assistant carbothermal reduction for SiC powders

Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material, 2008
The silicon assistant method to increase the reaction yield of carbothermal reduction of silica at a lower temperature is reported. The effect of silicon on the carbothermal reduction process has been investigated in detail. Compared with traditional reduction, the introduction of silicon can change the reaction path and further increase the conversion
Kezhi Li, Jian Wei, Hejun Li, Chuang Wang, Gengsheng Jiao   +4 more
openaire   +1 more source

Priority Lithium recovery from spent Li-ion batteries via carbothermal reduction with water leaching

Resources, Conservation and Recycling, 2023
Zhiming Yan, Zushu Li
exaly