Abstract
A novel counter-flow liquid injection plasma synthesis (CF-LIPS) reactor has been developed to produce ceramic powders. By using a counter-flow plasma configuration, entrainment of reactant particles into the plasma is improved compared to conventional injection methods. The counter-flow process also creates large recirculation zones which increase the residence time to more than 100 ms as predicted by modeling results [1]. The long residence time ensures complete evaporation and decomposition of precursor particles and complete reactions to the desirable products. Also, the process employs liquid precursors rather than solids, resulting in less contamination of products from unevaporated reactants. Results show that CF LIPS is an excellent method for producing single-phase and spherical spinel powders with a narrow particle size distribution. Particle size increases with increasing precursor concentration based on the synthesis of magnesium aluminate powders. Characterization techniques include X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDXS), X-ray mapping, centrifugal sedimentation particle size distribution analysis, and vibrating sample magnetometer (VSM) measurements. In addition, crystallographic studies are conducted to determine the bond lengths, bond angles, and stoichiometries of the as-produced spinels.
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References
S. H. Paik, Xi Chen, P. Kong, and E. Pfender,Plasma Chem. Plasma Process. 11, 229 (1991).
P. Kong and E. Pfender, “Plasma Synthesis of Fine Powders by Counter-Flow Liquid Injection,”International Symposium on Combustion and Plasma Synthesis of High-Temperature Materials, San Francisco, Oct. 23–26, 1988.
T. W. Or, Master's Thesis, University of Minnesota, December, 1990.
I. A. Tikhomirov, A. G. Karengin, and S. B. Kvesko,Phys. Chem. Mater. Treatment 18, No. 5, 42 (1984).
A. S. Eliseeva, V. L. Gartmen, E. V. Gorozhankin, and G. M. Krylov,Phys. Chem. Mater. Treatment 18, No. 5, 498 (1984).
H. Anderson, T. T. Kodas, and D. M. Smith,Ceram. Bull. 68, 996 (1989).
T. Kodas and A. Datye,J. Appl. Phys. 65, No. 5, 2149 (1989).
S. E. Pratsinis, T. T. Kodas, M. P. Dudukovic, and S. K. Friedlander,Powder Technol. 17, 17 (1986).
D. M. Roy, R. Neurgaonkar, T. P. O'Holleran, and R. Roy,Ceram. Bull. 56, 1023 (1977).
J. P. Pollinger and G. L. Messinger, “Synthesis of Al2O3, MgO, and Spinel Powder by Plasma Vaporization of Solutions,”Proc. of the Am. Ceram. Soc., 1986 Conference Ceramic Powder Science and Technology, Boston, Aug. 3–6, 1986.
Z. P. Lu, T. W. Or, P. Kong, L. Stachowicz, and E. Pfender,Material Research Society Symposium Proceedings, Vol. 190, Plasma Synthesis and Plasma Processing of Materials, San Francisco, California, April 17–19 (1990).
P. Kong, T. W. Or, L. Stachowicz, and E. Pfender,Material Research SocietI'S ymposium Proceedings, Vol. 190, Plasma Synthesis and Plasma Processing of Materials, San Francisco, California, April 17–19 (1990).
C. L. Chan, “Some Properties of Chemical Vapor Deposited Diamond and Spinels,”Trans. Am. Geophys. Union 72, No. 17, 147 (1991).
Z. P. Lu, T. W. Or, J. Heberlein, and E. Pfender, “Diamond CVD in Thermal Plasmas,”The 28th National Heat Transfer Conference, Minneapolis, The Heat Transfer Division, ASME, HTD, Vol 161 (1991) p. 21.
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Or, T.W., Kong, P.C. & Pfender, E. Counter-flow liquid injection plasma synthesis of spinel powders. Plasma Chem Plasma Process 12, 189–201 (1992). https://doi.org/10.1007/BF01447446
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DOI: https://doi.org/10.1007/BF01447446