Conductive SrVO3 Powders Synthesized by Sol-Gel Method

Abstract:

Conductive SrVO₃ powders were synthesized by sol-gel method combined with subsequent heat treatment. The molar ratio of Sr:V was adjusted during the sol process. The thermal behavior of the gel was analyzed to figure out the calcination temperature in order to get the precursors without residual carbon, and then the gel was reduced in H₂ to obtain the final products. The influence of temperature and molar ratio of Sr:V on the morphologies, structures and compositions was researched. The conductivity of the samples was tested by standard dc four-probe technology. The results show that when the molar ratio of Sr:V=1:1.06, the calcination temperature is 500 °C and reduction temperature is 850 °C in H₂, the SrVO₃ powers without the impurities of residual carbon or vanadium oxides can be obtained. The electrical conductivity of SrVO₃ powders reaches 714.3 S/cm, while that of graphite powders is about 500 S/cm.