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Characterization of Particles Synthesized by Aerosol Processes for Various Pb:Si Molar Feed Ratios

Published online by Cambridge University Press:  15 February 2011

Timothy M. Owens  and
Pratim Biswas
Timothy M. Owens
Affiliation:
National Research Council Postdoctoral Fellow Current Address: Chemical Science and Technology Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899, towens@batman.nist.gov
Pratim Biswas
Affiliation:
Aerosol and Air Quality Research Laboratory, Department of Civil and Environmental Engineering, University of Cincinnati, Cincinnati, OH 45221-0071
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Abstract

A detailed characterization was performed of the particles produced under various Pb:Si molar feed ratios in a flow reactor at a maximum temperature of 1000 °C. The silica particles formed in the high temperature region coagulated and only partially coalesced to form large agglomerate structures of high specific surface area. For a lead only feed, the resulting particles were hydrocerussite with small but detectable amounts of massicot. As the silica precursor was inlet in excess amounts (Pb:Si ≤ 1:12), the crystalline lead compounds disappeared and amorphous lead-silica complexes predominated. The particle morphology also changed from cylindrical, polygonal and spherical shapes to large agglomerate structures composed of several size modes of primary particles. At Pb:Si molar feed ratios of 1:12 and 1:29, the particles making up the chain-like agglomerate structure were primarily spherical with larger lead silicate spherical particles (≈ 0.5 μm) attached to the agglomerate. The lead was found to be distributed throughout the large agglomerate structures.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 400: Symposium E – Metastable Metal-Based Phases and Microstructures , 1995 , 101
Copyright
Copyright © Materials Research Society 1996

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References

1. Barton, R., Clark, W. and Seeker, W., Combust. Sci. and Technol., 74, p. 327 (1990).Google Scholar
2. Linak, W. P. and Wendt, J. O. L., Prog. Energy Combust. Sci., 19, p. 145 (1993).Google Scholar
3. Dempsey, C. R. and Oppelt, E. T., J. Air and Waste Mgmt. Assoc., 43, p. 25 (1993).Google Scholar
4. Owens, T. M. and Biswas, P., to appear in Ind. Eng. Chem. Res. J., 1996.Google Scholar
5. Biswas, P., Aquino, M. I., Zachariah, M. R., McMillin, B. and Owens, T. M., submitted to Envir. Sci. Technol., 1995.Google Scholar
6. Wu, C. Y. and Biswas, P., Combustion and Flame, 92, p. 31 (1993).Google Scholar
7. Lin, W. Y., Sethi, V., and Biswas, P., Aerosol Sci. Technol., 17, p. 119 (1992).Google Scholar
8. Lyons, S. W., Yun, X., Ward, T. L. and Kodas, T. T., J. Materials Res., 7, p. 3333 (1992).Google Scholar
9. Owens, T. M., Wu, C. Y. and Biswas, P., Chem. Engr. Comm., 133, p. 31 (1995).Google Scholar
10. Eighmy, T. T., Eusden, J. D. Jr., Krzanowski, J. E., Domingo, D. S., Stampfli, D., Martin, J. R. and Erikson, P. M., Environ. Sci. Technol., 29, p. 629 (1995).Google Scholar
11. Ulrich, G. D., Combust. Sci. Technol., 4, p. 47 (1971).Google Scholar
12. Hinds, W. C., Aerosol Technology: Properties, Behavior, and Measurement of Airborne Particles ,Wiley, New York, 1982.Google Scholar
13. Lide, D. R., ed., CRC Handbook of Chemistry and Physics, 74th Edition, CRC Press, Boca Raton, 1994.Google Scholar
14. Biswas, P., Li, X. and Pratsinis, S. E., J. Appl. Phys., 65, p. 2445 (1989).Google Scholar
15. Lee, K. W., Chen, H. and Gieske, J. A., Aerosol Sci. Technol., 3, p. 53 (1984).Google Scholar
16. Lee, K. W., J. Colloid Interface Sci., 92, p. 315 (1983).Google Scholar
17. Matsoukas, T. and Friedlander, S. K., J. Colloid Interface Sci., 146, p. 495 (1991).Google Scholar