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.