Synthesis and electrical resistivity analysis of ATO-coated talc

This paper provided an economical route to produce composite conductive powders. The aim of this work was to uniformly deposit antimony-doped tin oxide (ATO) nanoparticles onto talc matrix by co-precipitation to prepare Sb-SnO2/talc (SST) composite conductive powders after calcination. The samples were characterized by X-ray diffraction and scanning electronic microscopy. In order to investigated the mechanism of hydrolysis reaction the precursors of ATO powder were researched by means of thermogravimetric analysis. Each effect of pH, coating ratio, SnCl4·5H2O/SbCl3 mass ratio, hydrolysis temperature, calcination temperature and time on the resistivity of the SST powders was studied. Under the optimum experimental conditions, the resistivity of the composite conductive powders was less than 10 Ω cm.

The talc displayed the platelike structure and the surface was rather smooth. However, after coated with ATO the surface of talc was rough and a little out-of-flatness. It can be seen that the SST powders still retained the platelike structure after coated with ATO nanoparticles.Figure optionsDownload as PowerPoint slideHighlights
► ATO was deposited on talc matrix to prepare composite conductive powders.
► The effect of all parameters on the resistivity of the SST powders was studied.
► Under the optimum conditions, the resistivity was less than 10 Ω·cm.