Influence of Tin Oxide Addition in the Morphologic Characteristics of Zinc Oxide Powders Synthesized by Pechini's Method

G.J. Pereira; Douglas Gouvêa; S.M. Hiraoka

doi:10.4028/www.scientific.net/MSF.498-499.704

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HomeMaterials Science ForumMaterials Science Forum Vols. 498-499Influence of Tin Oxide Addition in the Morphologic...

Influence of Tin Oxide Addition in the Morphologic Characteristics of Zinc Oxide Powders Synthesized by Pechini's Method

Abstract:

Zinc oxide is widely used in semiconductors fabrication, pigments and mainly in varistors. The electrical properties of ZnO based varistors are related to the grain boundary characteristics, and it can be modified using additives. In this work, zinc oxide based powders were prepared by chemical route derived from the Pechini’s method, and small amounts of tin ions were added to the system. The XRD measurements showed that the tin oxide not forming solid solution in the bulk, and it was observed that the increasing of tin concentration causes an increasing of the surface area at isothermal conditions of calcination. Once the isoelectric point was dislocated to more acid values, the hypothesis of segregation onto surface was considered.

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Periodical:

Materials Science Forum (Volumes 498-499)

Pages:

704-709

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.498-499.704

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Online since:

November 2005

Authors:

G.J. Pereira, Douglas Gouvêa, S.M. Hiraoka

Keywords:

Pechini, Segregation, Synthesis, Zinc Oxide (ZnO)

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