Artigo
Effect of atmosphere on the sintering and grain growth of tin oxide
Fecha
1999-12-01Registro en:
Materials Science Forum, v. 299-300, p. 134-140.
0255-5476
10.4028/www.scientific.net/MSF.299-300.134
WOS:000079831600018
2-s2.0-4444257922
Autor
Universidade Estadual Paulista (Unesp)
Chemistry Dept.
Resumen
High purity SnO 2 powder (>99.9%) was compacted in cylindrical pellets and sintered in atmospheres of dry argon, argon with water vapor, oxygen and CO 2 using 10 °C/min up to 1200 °C or isotherms in the range of 1000 to 1200 °C. Time, temperature and sintering atmosphere have large influence on grain growth and low influence on densification of this oxide. Surface diffusion is the dominant mechanism up to 1200 °C and evaporation-condensation is dominant above 1200 °C. The maximum linear shrinkage observed was about 2.0% and attributed to structural rearrangement of particles due to high capillary stresses developed with neighboring particles. © 1999 Trans Tech Publications.