Surface Covering of Antimony-Doped Tin Oxide on Titanium Dioxide and Resistivity Analysis

Functional nanocomposites have been widely studied in recent years. Because of its non-toxic and inexpensive properties, titanium dioxide has pervasive application value in the chemical industry. Nano-sized antimony-doped tin oxide (ATO) metallic oxide was developed and combined with a pure titanium dioxide substrate by the effective co-precipitation method. The obtained powder had good conductibility, and its carriers were supplied by the infiltrated Sb atoms in tin oxide crystal. In the present work, the calcination temperatures and molar ratio of tin (IV) chloride pentahydrate (SnCl 4 ·5H 2 O) and antimony (III) chloride (SbCl 3 ) were optimized for achieving excellent electrical performances. As a result, the sheet resistivity of Sb-SnO 2 /TiO 2 was in the range from 9 kΩ·cm to 15 kΩ·cm. By mixing method, the resistance of Sb-SnO 2 /TiO 2 /PDMS could be as low as 2 MΩ.