Combustion synthesis of non-agglomerated A12O3 and TiO2 nanopowders in uniform electric fields

Hong Zhao, Venkata Rapaka, Stephen D. Tse

Research output: Contribution to conferencePaperpeer-review

Abstract

This paper presents some results on A12O3 and TiO2 nanoparticles produced using an axisymmetric stagnation-point premixed flat flame from corresponding organometallic vapor precursors. In our setup, along with the thermophoretic effect, the major mechanism that controls the rate of particle deposition on the substrate is the electrophoretic effect, which originates due to the response of nanoparticles, charged by the combustion process through thermionic emission, in a uniform electric field. The effect of electrical field strength and direction on aggregate size, crystallinity, primary particle size, and surface area, were examined using DLS, XRD, TEM, and multi point BET nitrogen adsorption, respectively. Additionally, the Sandia Spin code was used to calculate the gas-phase flame structure. The temperature/residence time history that the particles experience in the flame nder different electrical fields and pressures has been estimated.

Original languageEnglish (US)
Pages1845-1852
Number of pages8
StatePublished - 2005
Event43rd AIAA Aerospace Sciences Meeting and Exhibit - Reno, NV, United States
Duration: Jan 10 2005Jan 13 2005

Other

Other43rd AIAA Aerospace Sciences Meeting and Exhibit
CountryUnited States
CityReno, NV
Period1/10/051/13/05

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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