Evolution in Structural and Optical Properties of Stannic Oxide Xerogel upon Heat Treatment

@inproceedings{Wu2004EvolutionIS,
  title={Evolution in Structural and Optical Properties of Stannic Oxide Xerogel upon Heat Treatment},
  author={N. Wu and Li-Fu Wu and Irene Rusakova and Alejandro Hamed and A. P. Litvinchuk},
  year={2004}
}
Upon consecutive heat treatments at increasing temperatures, the microstructure of solution–sol–gel-derived stannic oxide (SnO2) xerogel evolves in three stages: (I) below 300°C, characterized by extensive dehydroxylation and gel shrinkage with little grain growth and surface loss; (II) between 300° and 500°C, by extensive crystallization, leading to dramatic surface loss (by 70%); and (III) above 500°C, by grain growth. Concurrently, the UV-absorption edge shows red shifts during stages I and… CONTINUE READING