High purity SnO{sub}2 powder (>99.9%) was compacted in cylindrical pellets and sintered in atmospheres of dry argon, argon with water vapor, oxygen and CO{sub}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 linearshrinkage observed was about 2.0% and attributed to structural rearrangement of particles due to high capillary stresses developed with neighboring particles.
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