Sintesis de ceramicos de ZnO dopados con praseodimio y cobalto

Zinc oxide, ZnO, is a very interesting compound in science and electronic ceramics technology. ZnO ceramics containing some additives were reported to show varistor action with excellent nonlinearity in current - voltage characteristics. However, investigations were restricted to the ZnO - Bi2O3 cer...

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Bibliographic Details
Published in:Materials research (São Carlos, São Paulo, Brazil) São Paulo, Brazil), 2003-06, Vol.6 (2), p.211-217
Main Authors: Cruz, Ana Milena, Avila, Humar, Rodríguez-Páez, Jorge Enrique, Castro, Mirian Susana
Format: Article
Language:English
Subjects:
earth rares
powder synthesis
varistor
zinc oxide
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Summary:Zinc oxide, ZnO, is a very interesting compound in science and electronic ceramics technology. ZnO ceramics containing some additives were reported to show varistor action with excellent nonlinearity in current - voltage characteristics. However, investigations were restricted to the ZnO - Bi2O3 ceramic system. Other type of varistor, which contains praseodymium oxide, also present nonlinear behaviour. In this work, results obtained in the synthesis Zn-Pr-Co powder are shown. In order to determine and control the several stages of the chemical method, potentiometric titration was used. The solid phase obtained was pressed and sintered.
ISSN:1516-1439
1516-1439
DOI:10.1590/S1516-14392003000200016