|About this Abstract
||Materials Science & Technology 2012
||MS&T'12 Poster Session
||B48: Fast Sintering of SnO2 Nanoparticles after Chemical Lixiviation
||Gilberto Pereira, Pedro G. M. R. Basso
|On-Site Speaker (Planned)
Tin oxide based powders without additives present low densification even at high sintering temperatures. Usually, metal cations are introduced as sintering aid, and the densification can be achieved when low temperatures as 1200°C are used, even within a few seconds. In this work, SnO<sub>2</sub> based powders were prepared with different amounts of Mg<sup>2+</sup> by a polymeric chemical process derived from Pechini’s method. The powders were submitted to a lixiviation (washing) process. Both washed and unwashed samples were sintered by fast firing. All unwashed samples presented high initial densification rate, while washed samples showed low rate, but similar to samples containing few amounts of Mg<sup>2+</sup>. Since sintering is a high-temperature process strongly dependent on surface characteristics, a relationship between additive removal and the sintering behavior can be established. All powders were characterized by specific surface area. The sintering was studied by means of final density.
||Definite: A CD-only volume