Effect of Niobia on the Sintering of SnO2

  • D. Gouvea
  • J. A. Varela
  • C. V. Santilli
  • E. Longo


SnO2 crystallizes in tetragonal system with structure similar to rutile and is a n-type semiconductor. The electrical conductivity is mainly due to the existence of point defects (oxygen vacancies) that generate donor electron levels. Its electrical and optical properties have been studied for many technological applications1,2, and thin films and compacts are used as electrodes for electrochemical processes. The grain boundary properties of SnO2 have been studied with respect to its use in gas sensors. SnO2 films are used as electrodes in electron optical devices and as heating elements.


Pore Diameter Apparent Density Pore Growth Ceramic Varistor Liquid Phase Formation 
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Copyright information

© Springer Science+Business Media New York 1989

Authors and Affiliations

  • D. Gouvea
    • 1
  • J. A. Varela
    • 1
  • C. V. Santilli
    • 1
  • E. Longo
    • 2
  1. 1.Instituto de QuimicaUNESPAraraquaraBrazil
  2. 2.Departamento de QuimicaUFSCarSao CarlosBrazil

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