Characterization of particles synthesized by aerosol processes for various Pb:Si molar feed ratios

Timothy M. Owens, Pratim Biswas

Research output: Contribution to journalConference articlepeer-review

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.

Original languageEnglish (US)
Pages (from-to)101-106
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Volume400
StatePublished - 1996
Externally publishedYes
EventProceedings of the 1995 Fall MRS Symposium - Boston, MA, USA
Duration: Nov 27 1995Nov 30 1995

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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